Check Point: TDS-gated ecosystem impersonating Ghidra/dnSpy/ILSpy delivers SessionGate, RemusStealer, AnimateClipper

Check Point Research details a malware-distribution operation that impersonates open-source reversing tools using CloudFront-hosted JavaScript to hijack download clicks and route victims through a Traffic Distribution System enforcing geo/device/VPN/frequency filtering before delivering one of three payloads (Check Point Research, 2026-06-03). The payloads are SessionGate (a per-session multi-stage loader with AES-encrypted modules), RemusStealer (targeting 20+ browsers, 220+ wallet extensions, 77 password-manager extensions and 18 2FA tools), and AnimateClipper (a clipboard hijacker with on-chain C2). The targeting is notable for this audience: it goes after security researchers and developers searching for trusted tools, bypassing standard phishing-awareness training (T1566, T1204, T1555, T1111). Hunt for ghidra/dnspy/ilspy download-then-execute chains under browser child processes and clipboard-API access from unexpected processes. [SINGLE-SOURCE] (Check Point primary research).

Check Point disclosed and patched CVE-2026-50751 (CVSS 9.3) on 8 June 2026 — a logic-flow weakness in certificate validation in the deprecated IKEv1 key exchange affecting Remote Access VPN and Mobile Access deployments. An unauthenticated remote attacker can establish a VPN session without a valid user password; post-authentication activity is still required to reach internal resources (Check Point, 2026-06-08). NCSC-CH issued an Action-Required advisory the same day and links observed exploitation to a Qilin ransomware affiliate (NCSC-CH, 2026-06-08); CISA added the CVE to its KEV catalog on 8 June. Full technical treatment, exploitation prerequisites and hardening are in § 5 below. The companion CVE-2026-50752 (CVSS 7.4, site-to-site IKEv1 MitM, no observed exploitation) should be patched in the same window.

CISA added CVE-2026-42271 to its KEV catalog on 8 June 2026, confirming active exploitation of a command-injection flaw in LiteLLM, the open-source AI gateway/proxy widely deployed to multiplex LLM API calls in enterprise AI stacks (GitHub Advisory GHSA-v4p8-mg3p-g94g). Two preview endpoints — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accept a full MCP server configuration (command, args, env) in the request body; with stdio transport, the proxy spawns the supplied command on the host under the proxy's privileges. The endpoints were gated only by a valid API key with no role check, so any authenticated user (including low-privilege internal keys) could execute arbitrary commands. Horizon3.ai documents that chaining with CVE-2026-48710 (a Starlette Host-header validation bypass) makes the path unauthenticated (Horizon3.ai, 2026-06-01). Affected: LiteLLM 1.74.2 to < 1.83.7; fixed in 1.83.7, which adds role-based authorization on the MCP test endpoints.

CVE Summary Table

Portainer shipped CE 2.33.8 / 2.39.2 / 2.41.0 on 2026-05-28 closing two CVSS 9.4 authorization bypasses; CCB Belgium issued a "Patch Immediately" advisory on the same day. CVE-2026-44848 (GHSA-rrmm-9v76-h3p4) — the Docker plugin-management endpoints (/plugins/*) are not registered in Portainer's proxy-authorization handler map, so any authenticated non-admin user with endpoint access can POST /plugins/pull to install a plugin from any registry and POST /plugins/{name}/enable to activate it; Docker runs enabled plugins as root on the host with the plugin's declared capabilities and mounts, giving OS-level code execution. CVE-2026-44849 (GHSA-5fxq-qcf3-244w) — Portainer's seven EndpointSecuritySettings restrictions (privileged mode, host PID, device mapping, capabilities, sysctls, security-opt, bind mounts) are enforced on the standard container-create path but not on the Docker Swarm service API; POST /services/create validates only Mounts[] (1 of 7 checks), and POST /services/{id}/update performs no checks at all. Non-admin users can submit arbitrary CapabilityAdd, Sysctls and Privileges values; a volume-driver bypass additionally allows bind-mount equivalents via Type: volume with VolumeOptions.DriverConfig.Options{type: none, o: bind}. Affected: CE 2.33.0–2.33.7, 2.39.0–2.39.1, 2.40.x. Temporary mitigation: revoke Swarm endpoint access for non-admin users via Portainer RBAC, disable plugin management for non-admin users.

UPDATE (originally covered 2026-05-20; consolidated in weekly W21): Microsoft Threat Intelligence published a full dissection of The Gentlemen ransomware on 2026-05-28, giving Storm-2697 a much sharper technical profile than the victim-list reporting available in week 21. The encryptor is a single-binary Go executable (obfuscated through Garble to strip symbol tables), uses Curve25519 + XChaCha20 with per-file ephemeral keys (no bulk-decryption shortcut), and ships a self-propagation module that executes a series of lateral-movement techniques in parallel per host — PsExec, WMIC, scheduled tasks, services, PowerShell remoting — maximising the probability that at least one pivot path succeeds in any AD-joined environment.

Check Point Research's 2026-05-13 writeup adds the actor-side context that Microsoft's dissection does not — Check Point counts approximately 332 victim organisations on the operator's leak site, and documents that on Domain Admin compromise The Gentlemen deploys itself across the estate through a Group Policy Object linked at all relevant OUs. Huntress Labs' 2026-05-21 IR report corroborates the defense-evasion playbook: PowerShell disables Microsoft Defender real-time monitoring (Set-MpPreference -DisableRealtimeMonitoring), stops WinDefend, adds broad Add-MpPreference -ExclusionProcess and drive-level exclusions, disables Controlled Folder Access, and clears Security / System / Application event logs (EID 104, EID 1102). Huntress documented two April / May 2026 incidents whose entry vector was RDP with compromised credentials, lateral movement reached domain controllers via the NETLOGON share and SCCM's CcmExec.exe, and process names were masqueraded as svchost32.exe. The DFIR Report's 2026-05-11 alert confirmed a related chain in which EtherRAT (delivered via a malicious Sysinternals MSI) and TukTuk C2 preceded Gentleman deployment. Microsoft's Defender detection name is Ransom:Win64/Gentlemen.A; recommended Attack Surface Reduction posture per Microsoft's ASR rules reference is Block process creations originating from PsExec and WMI commands combined with EDR-in-block-mode enforcement.

Material new development vs. last coverage: full encryption + propagation mechanism, named-cluster identity (Storm-2697), the GPO-spread pathway documented by Check Point Research, and Check Point's count of approximately 332 victims. Detection focus: hunt for wevtutil cl Security|System|Application chained with sc stop WinDefend or msconfig; flag svchost32.exe spawned outside %SystemRoot%\System32; alert on CcmExec.exe launching non-SCCM payloads. Hardening: enforce SMB signing GPO, restrict GPO-creation rights to a hardened OU, enable Credential Guard, monitor Event ID 5136 for GPO modifications and 5140 for the hidden share SMB share.

UPDATE (originally covered 2026-05-23): Following Unit 42's coverage of UNC1549 / Screening Serpens AppDomainManager hijacking, Check Point Research (published 2026-05-22, widely re-reported this week) adds material technical depth on three February–April 2026 campaign waves keyed to Operation Epic Fury (Check Point Research, 2026-05-22; The Hacker News, 2026-05-26). The IRGC-affiliated actor replaced its MiniJunk family with a new backdoor, MiniFast — a 64-bit DLL with a single CheckForUpdates export and a JSON HTTP C2 using API-style endpoints (/agent/init, /agent/poll, /upload/) and a 14-opcode command set including DLL injection, UAC elevation and scheduled-task persistence.

Two persistence/delivery techniques are new versus the prior coverage: (1) Zoom scheduled-task hijacking (T1053.005) — instead of creating a suspicious new task, the malware watches for the legitimate ZoomUpdateTaskUser-<SID> task and hijacks it; (2) SEO poisoning (T1598.003) via a fake SQL Developer download domain ranked on Bing/DuckDuckGo, alongside T1574.008 AppDomain hijacking via redirected .config files. The loader chain validates parent=svchost.exe before proceeding and abused two SSL.com-issued code-signing certificates (Check Point Research, 2026-05-22). Hunt for ZoomUpdateTaskUser-* task modifications by non-Zoom processes, non-default AppDomainManager values in .NET .config files, and execution from user-writable AppData paths.

Horizon research surfaced a quarterly report the dailies did not cover: Check Point's Q1 2026 State of Ransomware (published 2026-05-11). The synthesis that matters for a CH/EU public-sector SOC is structural, not the leaderboard: after two years of fragmentation driven by law-enforcement pressure on LockBit, ALPHV/BlackCat and others, the ecosystem is reconsolidating — the top ten leak-site operations now account for roughly 71% of listed victims, with Qilin holding the top spot for a third straight quarter and The Gentlemen (§ 7) entering the top three. The single most defender-relevant finding is LockBit's comeback paired with a deliberate geographic shift toward European and Latin American targets — which moves the rebuilt operation directly into this audience's threat model rather than leaving it a US-centric concern. Read alongside the Gentlemen internal-leak intelligence in § 7, the picture is a smaller number of higher-capability operations with European intent; prioritise the edge-appliance and identity hardening those operators are documented to rely on.

The most consequential campaign development of the window is one no daily captured: on 2026-05-04 a rival actor leaked The Gentlemen's internal Rocket database backend on underground forums, and KELA (2026-05-20) and Check Point ("Thus Spoke The Gentlemen", 2026-05-13) published deep analyses of the resulting six-month (Nov 2025 – Apr 2026) chat archive (key: item:the-gentlemen-raas-czech-university-and-swiss-engineering-fi). The leak exposes the inner circle (admin/infrastructure alias zeta88, also operating as hastalamuerte, alongside Wick, mAst3r, Kunder and others) and — far more useful to defenders — the operation's initial-access playbook: Fortinet and Cisco edge appliances, NTLM relay, harvested OWA / M365 credential logs, and GPO-based deployment of the encryptor. A linked affiliate runs a SystemBC SOCKS5 botnet of 1,570+ victims. This is an intelligence gift: every named access path maps to an existing hunt — prioritise edge-appliance patch state, NTLM-relay hardening (SMB/LDAP signing, channel binding) and anomalous-GPO-creation monitoring. Per Check Point's Q1 data the group sits at #3 globally (§ 6) — though its victims concentrate in Thailand, Brazil and India (US ~13%), so the European and Swiss listings carried over from W21 run against its centre of gravity, which is precisely what makes a CH/EU hit worth surfacing rather than treating as background.

Unit 42 published a comprehensive write-up on Screening Serpens (a.k.a. UNC1549, Smoke Sandstorm, Nimbus Manticore) on 2026-05-22 covering operations from February through April 2026 timed to the onset of the U.S.–Israeli Middle East conflict that began 2026-02-28 (Unit 42, 2026-05-22 · Cybersecurity Dive, 2026-05-22). The group deployed new RAT variants across two malware families: MiniUpdate in four variants used between 2026-03-26 and 2026-04-17 with lures impersonating aviation, healthcare and financial-services firms, and MiniJunk V2 in two variants used between 2026-02-17 and 2026-03-27 against Middle Eastern and U.S. targets.

The technically significant evolution is AppDomainManager hijacking (T1574.014) paired with classic DLL sideloading (T1574.001): the infection chain drops a legitimate Microsoft .NET executable alongside a weaponised UpdateChecker.dll / InitInstall.dll / Updater.dll and — critically — a malicious .runtimeconfig.json that redirects the CLR's AppDomainManager loading at process startup, silently disabling ETW tracing and strong-name validation before the RAT executes. That leaves the host's EDR operating in a reduced-telemetry mode on every infected workstation. Delivery is high-touch — fake recruitment PDFs, spoofed video-conference meeting invitations, and ZIP archives containing a legitimate executable as the trigger; persistence uses scheduled tasks; C2 routes through Azure-hosted domains. Confirmed targets: U.S., Israel, UAE, plus at least two further Middle Eastern entities consistent with prior UNC1549 focus on aerospace, defence and telecommunications. The CH/EU nexus is indirect but real — Swiss aerospace and defence suppliers (RUAG, Pilatus and defence export channels) sit squarely in the sector profile, as do EU R&D firms historically swept up in Iranian collection campaigns.

Detection vantage: alert on .runtimeconfig.json writes by non-installer processes; watch the Microsoft-Windows-DotNETRuntime ETW provider for StrongNameVerification=0 startup events and CLR debug-mode initialisation; watch scheduled-task creation from processes with .dll parent images loading via rundll32.exe / svchost.exe. Hardening: enforce a code-integrity policy (UMCI + trusted-signers allowlist) so unsigned DLLs cannot load into the .NET CLR; restrict .runtimeconfig.json writes outside install paths via FIM.

Check Point Research's March-April 2026 AI Threat Landscape Digest (published 2026-05-22) is the operationally most striking annual / periodic AI report of the past month. The centrepiece — researched by Gambit Security and summarised in the Check Point post — documents a single unidentified operator compromising nine Mexican government agencies between December 2025 and February 2026, covering tax records, civil registry, patient files and electoral infrastructure. The structural innovation: the attacker ran two commercial AI platforms in parallel — one managing live exploitation and issuing >5,000 AI-executed commands, a second processing harvested data and feeding instructions back into the first. Persistence for the AI itself was simple: modifying the AI client's startup configuration file to embed persistent instructions inherited by every subsequent session.

Two further findings have direct EU/CH public-sector implications. First, the EvilTokens platform — a commercial jailbreak-as-a-service tool packaging AI-driven phishing generation, financial-data extraction and similar capabilities as a subscription — represents the same commoditisation curve as Kali365 (§ 1) but for AI-assisted intrusion. Second, CPR explicitly calls out that stolen API keys for Anthropic, OpenAI, Groq and Mistral are now high-value criminal targets, since they grant access to powerful AI services without an account; Swiss federal and cantonal agencies using commercial AI APIs should treat key rotation cadence and source-IP scoping (Conditional Access on the API layer) on par with classic privileged-credential hygiene. Detection vantage: bulk exfiltration events temporally co-located with anomalous API call patterns to commercial AI services from non-standard processes; process trees in which AI client libraries spawn data-collection subprocesses; cloud audit logs showing API key issuance followed immediately by large-volume inference calls from unusual source IPs.

HiddenLayer / Hadrian researchers disclosed CVE-2026-45829, a CVSS 4.0 = 10.0 pre-authentication RCE in ChromaDB's Python FastAPI server (affected from v1.0.0) (Hadrian Security, 2026-05-19; BleepingComputer, 2026-05-19). The vulnerable endpoint is POST /api/v2/tenants/{tenant}/databases/{db}/collections: when the request body sets trust_remote_code: true with an attacker-controlled HuggingFace model identifier (or a local path), the server fetches and executes the attacker-supplied Python code before the auth check fires, then politely returns 403 Forbidden after the code has run. The flaw exists only in the Python FastAPI server (chromadb[server] pip package) — the default Rust server (chroma run) does not traverse this code path. Per BleepingComputer's reporting of Shodan queries, approximately 73 % of internet-exposed ChromaDB instances are running a vulnerable version of the software. As of disclosure, ChromaDB v1.5.9 (latest) is unpatched. Mitigations: disable the Python FastAPI server and migrate to the Rust server; alternatively, block network-level access to the ChromaDB API (it should never be internet-exposed in the first place); if internal, set trust_remote_code: false server-wide via config. Detection concept — unexpected outbound network connections from ChromaDB Python server processes; child processes spawned by uvicorn / gunicorn workers with non-default lineage; access logs showing POST /api/v2/.../collections bodies referencing HuggingFace repository slugs with attacker-controlled patterns. T1190 Exploit Public-Facing Application; the impact maps to T1059.006 Python execution under the server context.

UPDATE (originally covered 2026-05-14 backend database leak analysis): The TheGentlemen RaaS group's leak site listed two new European victims this week: University of Finance and Administration (VSFS, vsfs.cz) in the Czech Republic on 2026-05-19 and Swiss engineering firm DEVO-Tech AG (devo-tech.ch, Ziefen / BL) on 2026-05-18. The DeXpose write-ups are aggregator coverage of the leak-site listings themselves; neither victim has publicly confirmed the breach as of this brief. TTPs, infrastructure, and the Go-based locker remain unchanged from the Check Point Research deep coverage of 2026-05-14 — the new data point is geographic spread continuing into EU higher education and Swiss SMB engineering.

Higher-education and public-sector defenders in the DACH region should confirm offline-backup integrity and revisit SD-WAN / VPN gateway patch posture (the primary initial-access vectors documented for TheGentlemen in prior reporting). Listings are not victim confirmation; both organisations were listed by TheGentlemen and not confirmed by the victims themselves.

BigBlueButton (BBB) — the de facto open-source virtual classroom platform deployed across German DFN, Swiss SWITCH, and pan-European GÉANT academic networks, including cantonal school deployments — published three GitHub Security Advisories on 2026-05-17 covering distinct flaws in its bbb-web component, all in versions before 3.0.21 (two of three) and 3.0.23 (one). CVE-2026-46351 (CVSS 8.1) is a CWE-330 weakness: the sessionToken is generated with insufficiently random values, letting an authenticated low-privilege attacker who shares or has observed a meeting determine other participants' session tokens and impersonate any conference user (BBB GHSA-7959-pf2v-xc4h, 2026-05-17). CVE-2026-46353 (CVSS 8.1) is a CWE-284 access-control bypass in the presentationUploadExternalUrl endpoint: by supplying specific URL parameters an attacker can bypass checksum validation and send valid API requests to restricted endpoints without proper authentication, with high confidentiality + integrity impact (BBB GHSA-43hc-5g2m-cqff, 2026-05-17). CVE-2026-46404 (CVSS 6.8) is a CWE-918 SSRF in presentation URL validation: insufficient redirect-following checks allow a high-privilege authenticated attacker to reach RFC1918 and link-local (169.254.0.0/16) addresses from the BBB server context (BBB GHSA-xqm3-6q7q-4v5h, 2026-05-17). BSI's WID-SEC-2026-1568 corroborated on 2026-05-18 (BSI WID-SEC-2026-1568, 2026-05-18).

Why it matters to us: BBB is operated at scale by Swiss cantonal Volksschule deployments, German Länder ministries of education and university IT, EU national-research-and-education networks (NRENs). The combination of session-token prediction + checksum bypass would let a low-privilege classroom participant impersonate other students and teachers or send arbitrary authenticated API calls; SSRF on the server gives a presenter-role lateral-movement primitive into RFC1918 networks (KVM hosts, internal LDAP, SIS endpoints). Upgrade bbb-web to ≥ 3.0.21 for the first two CVEs and ≥ 3.0.23 for the SSRF; monitor bbb-web logs for anomalous joins using close-by sessionTokens and for API calls to presentationUploadExternalUrl carrying unexpected URL parameters; alert on egress from the BBB server process to RFC1918 / 169.254/16 ranges. MITRE T1212 (Exploitation for Credential Access) covers the session-token-prediction primitive; the SSRF maps to T1190 (Exploit Public-Facing Application) chained with internal-network reach.

UPDATE (originally covered 2026-05-13, 2026-05-15): Three concurrent developments show the TeamPCP / Shai-Hulud campaign has entered an open-source-imitator phase following Datadog Security Labs' 2026-05-13 analysis of the leaked Shai-Hulud worm source code. First, OX Security disclosed on 2026-05-17 four malicious npm packages published by deadcode09284814 — chalk-tempalte, @deadcode09284814/axios-util, axois-utils, and color-style-utils — combined weekly downloads ~3,000 (OX Security, 2026-05-17; The Hacker News, 2026-05-18). chalk-tempalte is a near-unmodified clone of the leaked Shai-Hulud worm with a modified C2 server and a new attacker-controlled key embedded in the code — the two primary sources disagree on whether this is a public or private key (see § 7); axois-utils bundles "Phantom Bot," a Golang HTTP/TCP/UDP/Reset-flood DDoS tool with Windows Startup folder and Linux scheduled-task persistence that survives package removal; the other two harvest SSH keys, cloud-provider credentials (AWS/GCP/Azure), and cryptocurrency wallet data.

Second, SANS ISC synthesised a 2026-05-18 campaign update confirming that Checkmarx officially acknowledged on 2026-05-11 that its Jenkins AST Scanner plugin had been trojanised — version 2026.5.09, compromise window 2026-05-09 01:25 UTC to 2026-05-10 08:47 UTC — making this TeamPCP's third confirmed Checkmarx intrusion in three months (SANS Internet Storm Center, 2026-05-18; Checkmarx, 2026-05-12). Hundreds of Jenkins controllers installed the malicious plugin before removal; remediated builds 2.0.13-848 and 2.0.13-847 are safe. CxSAST on-premise was unaffected; the cloud-integrated checkmarx/ast-github-action, checkmarx/kics-github-action, and VS Code extensions were all trojaned.

Third, SentinelLabs disclosed on 2026-05-07 — also folded into the SANS ISC summary — "PCPJack," a rival cloud worm that scans for exposed Docker, Kubernetes, Redis, MongoDB and RayML services and chains five CVEs (CVE-2025-29927 Next.js middleware auth bypass; CVE-2025-55182 Next.js Server Actions deserialization; CVE-2026-1357 WPVivid arbitrary file upload; CVE-2025-9501 W3 Total Cache RCE; CVE-2025-48703 CentOS Web Panel command injection) for initial access, then explicitly kills TeamPCP processes and removes TeamPCP artefacts before harvesting credentials — assessed by SentinelLabs with moderate confidence as possibly a former TeamPCP affiliate. Defender takeaway for the Swiss/EU public-sector SOC: developer endpoints and CI/CD runners with installed Checkmarx plugin should be audited for plugin versions outside the known-safe SHA range during the 2026-05-09 → 2026-05-10 window; npm audit and SBOM scans should flag the deadcode09284814 author/scope; egress from CI runners to *.lhr.life hostnames is a high-fidelity hunt pivot for the npm worm wave; Docker/Kubernetes/Redis/MongoDB endpoints exposed to the internet should be inventoried and removed from public exposure (PCPJack's scan list). MITRE T1195.002 (Supply Chain Compromise), T1552.001 (Credentials in Files), T1041 (Exfiltration over C2 Channel).

UPDATE (originally covered 2026-W21 weekly): VulnCheck honeypot telemetry confirmed active exploitation of CVE-2026-42945 on 2026-05-17, promoting the 18-year-old ngx_http_rewrite_module heap buffer overflow from PoC-public status (where it sat last week) to actively-exploited. The flaw is reachable by an unauthenticated remote attacker via a single crafted HTTP request to any NGINX instance running a rewrite-rule configuration that uses unnamed PCRE captures ($1, $2); successful exploitation crashes the worker process (DoS reliable on ASLR-enabled hosts) and reaches RCE on hosts where ASLR is disabled.

Affected per F5 PSIRT advisory K000161019: NGINX Open Source 0.6.27 through 1.30.0 (every release since 2008) and NGINX Plus R32 through R36, plus F5 NGINX Instance Manager, NGINX Ingress Controller, NGINX Gateway Fabric, NGINX App Protect WAF, F5 WAF for NGINX, and NGINX App Protect DoS. Patches: NGINX Open Source 1.30.1 / 1.31.0; NGINX Plus R32 P6, R36 P4. Interim mitigation if immediate upgrade is not possible: convert unnamed PCRE captures in all rewrite directives to named captures ((?P<name>...) syntax). Detection-engineering anchors that follow from the flaw class (heap-overflow worker crash under specific rewrite-rule configurations) are NGINX worker-process crash events (SIGSEGV / SIGABRT and immediate respawn) in syslog / journald, correlated with inbound HTTP requests carrying unusually long or deeply-nested rewrite-rule input strings from the same source; defenders should validate these against their own rewrite-rule configuration before depending on them.

HiddenLayer / Hadrian researchers disclosed a CVSS 10.0 pre-authentication RCE in ChromaDB's Python FastAPI server (affected from v1.0.0): the embedding-function model is loaded before the authentication check runs, so an unauthenticated request reaches code execution "before it asks who you are." Public PoC, still unpatched in v1.5.9. ChromaDB is a common vector-store backend for retrieval-augmented-generation stacks now appearing in public-sector AI pilots; any internet-reachable instance is exposed. Take ChromaDB off the public internet and front it with an authenticating reverse proxy until a fix ships.

Check Point's AI Threat Landscape Digest (published 2026-05-22, covered 2026-05-23) documents a single operator running two AI platforms in parallel to breach nine Mexican government agencies — the most concrete public example yet of AI tooling operationalised for end-to-end intrusion rather than reconnaissance assistance. Single-source (Check Point only); the synthesis relevant to this audience is the trajectory, not the victim count: where the Verizon and Rapid7 reports show AI compressing the exploitation timeline, this shows AI compressing the operator skill floor — fewer skilled humans needed per campaign. Treat as a directional indicator pending independent corroboration.

Check Point's April 2026 monthly threat report (published early May 2026) confirms Qilin / Agenda leading all ransomware operators with 15% of 707 published attacks in April; Germany is the third-most-targeted country globally at 5.0% of victims (US 41.6%); Europe accounts for 27% of ransomware victims globally. Sector targeting in April 2026: Business Services (33.8%), healthcare, manufacturing. The Gentlemen — despite the May 4 backend breach — remained in the top-7 operators with 320+ victims (Check Point Research, 2026-05-08). The synthesis the dailies did not yet absorb: Germany's 5% share of global ransomware victims is materially elevated compared to the 2024–2025 baseline (~2–3%); the Qilin DLS lists 65 German victims total as of 2026-05-16 (Check Point blog, dataset reference). For Swiss defenders: CH-DE cross-border operations (Swiss subsidiaries in DE, German subsidiaries of Swiss parents) inherit the German exposure level; this is the empirical basis for a DACH-region threat-modelling premium on ransomware-readiness exercises.

Following the 2026-05-04 Rocket backend DB leak (attributed to a breach of hosting provider 4VPS), administrator zeta88 / hastalamuerte announced a full communications-infrastructure overhaul — new NAS deployment and new locker upgrades — signalling no intent to cease operations. The operation maintained ~332 victims in H1 2026, ranking second in global RaaS activity per Check Point Research. Check Point documented initial access via CVE-2024-55591 (FortiOS management interface auth bypass, ITW since November 2024) and CVE-2025-32433 (Erlang SSH in Cisco context); post-access chain includes RelayKing-based NTLM relay (CVE-2025-33073), AD enumeration, EDR disablement, and GPO-deployed locker (Check Point Research; Check Point blog; daily 2026-05-14 UPDATE).

Bedrock Safeguard (Canadian security firm) published a working decryptor on 2026-05-14 exploiting Go's failure to zero XChaCha20 / X25519 ephemeral private-key material from goroutine stacks post-use; 35/35 files decrypted in testing. The operator claims to have patched the binary, so the decryptor capability is best-case retrospective; affiliates show no evidence of forking, and the core nine-person structure remains intact per leaked chats (Bedrock Safeguard decryptor). Defender takeaway: for any Gentlemen-impacted Go-binary host, attempt process-memory dump capture for ephemeral key recovery before reimaging; verify FortiOS patch state on CVE-2024-55591 across every Swiss / EU public-sector Fortinet deployment (the FortiOS bug is the documented initial-access primary, and the W19 long-running record already lists this CVE).

W19 long-running record (item:qilin-agenda-raas-die-linke-confirms-q2-2026-german-activity) tracked Qilin's continued German activity. W20 status: Check Point's April 2026 report confirms Qilin leads all RaaS operators at 15% of 707 published attacks in April; Germany's share at 5% of global ransomware victims is the elevated-DACH-exposure data point (Qilin DLS German-victim count cited by W1 horizon research as approximately 65 as of 2026-05-16 — uncorroborated leak-site enumeration that should be treated as a lower bound); Die Linke (German political party) confirmed Qilin compromise in March 2026 (W19 carry-over); no new Swiss-specific victim named in window (Check Point Research).

UPDATE (originally covered 2026-05-10 in the Q1 2026 ransomware quarterly synthesis): Check Point Research published "Thus Spoke…The Gentlemen" on 2026-05-13, a detailed analysis of a 44.4 MB extract from the group's leaked "Rocket" backend database (16.22 GB total) that was posted to the cybercrime forum Breached on 2026-05-04 after the group's infrastructure was compromised by an unidentified actor (Check Point Research, 2026-05-13; BankInfoSecurity, 2026-05-11). The dataset contains 8,200 lines of internal chat-tool traffic across channels INFO / general / TOOLS / PODBOR, shadow files with password hashes, affiliate negotiation transcripts, and configuration artefacts for the ZeroPulse C2 framework.

Nine operator handles are identified — including administrator zeta88 (also hastalamuerte), who both manages the RaaS panel and participates directly in encryption events. Reconstructed attack chain: initial access almost exclusively via unpatched edge devices — FortiGate CVE-2024-55591 (the group's documented mainstay), Cisco appliances, CWMP/TR-069 interfaces — or purchased infostealer credentials; post-access tooling includes NetExec, RelayKing (NTLM relay), CertiHound (AD Certificate Services abuse), TaskHound, PrivHound; EDR-suppression utilities EDRStartupHinder, gfreeze and glinker manipulate ETW callbacks and NTDLL syscall tables; persistence is maintained via Cloudflare Zero Trust tunnels and self-provisioned WireGuard/OpenVPN chains.

Two operationally critical facts: (1) Check Point Research attributes a count of 1,570+ victim entries to a separately-exposed SystemBC C&C server, against 332 victims publicly listed on the group's data-leak site in the first five months of 2026 — significant under-reporting of true scope (Check Point's wider comparison cites 412 cumulative DLS listings); (2) the decryptor has been released as GitHub Bedrock-Safeguard/gentlemen-decryptor, enabling existing victims to recover without payment (decryptor disclosed in BankInfoSecurity's 2026-05-11 reporting). For Swiss / EU SOCs handling an active Gentlemen incident the workflow changes today: attempt decryption before any negotiation. Detection pivots from the leak: alert on EDRStartupHinder, gfreeze, glinker process names (custom binaries, not commodity); monitor for AD Certificate Services reconnaissance (certutil enumeration of CA servers and templates) consistent with CertiHound; correlate with FortiGate CVE-2024-55591 initial-access exploitation patterns that the group continues to weaponise.

UPDATE (TeamPCP / mini-shai-hulud first covered 2026-05-07; PCPJack worm covered 2026-05-10; this is a distinct new artefact in the same actor ecosystem): On 2026-05-09–10 (UTC) TeamPCP (UNC6780) published a backdoored build of the Checkmarx Jenkins AST plugin (version 2026.5.09, marketed under the actor's signature naming "Checkmarx-Fully-Hacked-by-TeamPCP") to the Jenkins Marketplace. Any Jenkins instance configured to auto-update the AST plugin during that window pulled the malicious build and executed the SANDCLOCK credential stealer in the runner context (Checkmarx — Ongoing Security Updates, last updated 2026-05-09; The Hacker News, 2026-05-11; SecurityWeek, 2026-05-11).

SANDCLOCK targets every secret reachable from a typical CI/CD pipeline environment: GitHub Personal Access Tokens, AWS / Azure / GCP credentials, Kubernetes service-account tokens, Docker / OCI registry credentials, SSH keys, and Checkmarx One API tokens. Affected pipelines should be treated as full secrets-compromise events: every credential the runner could read must be rotated and any artefact built or deployed in the window audited. Checkmarx's ongoing-security-updates page specifies plugin version 2.0.13-829.vc72453fa_1c16 (published December 2025) as the safe pinned version; a CVE has been issued as CVE-2026-33634 per the Checkmarx advisory. This is the third Checkmarx-product supply-chain compromise by this actor in three months, after the March 2026 KICS Docker image and the April 2026 VS Code extension defacement — the cadence and the actor's naming convention indicate persistent targeting of the Checkmarx product line specifically, not opportunistic distribution-channel abuse.

Mapped to T1195.002 Compromise Software Supply Chain and T1552.001 Credentials In Files. The GTIG AI Threat Tracker (see § 5) attributes SANDCLOCK specifically to TeamPCP and flags the stealer as explicitly designed to harvest LLM API keys in addition to traditional cloud credentials — consistent with the actor's pivot to monetising stolen LLM access. Defender pivot: inventory every Jenkins plugin auto-update enabled across CI/CD estates; constrain runners to short-lived OIDC-federated credentials (no long-lived PATs in runner env) where the platform supports it; audit Checkmarx One API logs for unexpected source IPs since 2026-05-09.

For every Jenkins controller running the Checkmarx Jenkins AST plugin: confirm installed plugin version; if 2026.5.09 was ever pulled (auto-update enabled, or manual install in window), declare a secrets-compromise incident, rotate every credential the runner could read (GitHub PATs, AWS / Azure / GCP access keys, Kubernetes service-account tokens, Docker registry credentials, SSH keys, Checkmarx One API tokens, and any LLM API keys exposed to CI), and audit any artefact built or deployed in the window. Pin the plugin to 2.0.13-829.vc72453fa_1c16 per Checkmarx's ongoing-security-updates page. Where the Jenkins platform supports it, migrate runners to OIDC-federated short-lived credentials so the next supply-chain compromise yields no usable secrets.

W1 horizon research identified an in-window operator gap the daily briefs missed. "The Gentlemen" emerged in August 2025 and per ZeroFox surged to the second- or third-most-active ransomware operation globally in Q1 2026 — 192 attacks that quarter, a approximately 448% QoQ increase, 32% of Q1 2026 victims in Europe (up from 2% in Q4 2025) (ZeroFox Q1 2026 Wrap-Up, 2026-04-17). Check Point Research's DFIR report on the operator confirms the post-compromise tradecraft observed during a single incident-response engagement: Cobalt Strike delivered via RPC from a Domain Controller; Mimikatz for credential harvesting; GPO abuse to inject a scheduled task into Group Policy that propagates the encryptor to all domain-joined systems near-simultaneously (compressing time-to-encryption to minimise IR response window); SystemBC SOCKS5 C2 tunnelling and covert payload staging; encryption using X25519 Diffie–Hellman key exchange per file combined with XChaCha20 stream cipher, per-file ephemeral key pair with a random 32-byte private key (Check Point Research DFIR Report, 2026-04-20 · BleepingComputer — The Gentlemen + SystemBC, 2026-04-20). CPR explicitly states the precise initial-access vector could not be conclusively determined for the engagement it analysed; broader reporting attributes initial access to a FortiOS / FortiProxy attack surface that includes CVE-2024-55591 (authentication bypass, CVSS 9.8 — patched January 2025), with secondary reporting describing an operator database of pre-exploited devices and brute-forced VPN credentials primed for deployment — defenders should treat patch-state-alone as insufficient if the device was unpatched against CVE-2024-55591 at any point during the exposure window.

European victims surfaced in BleepingComputer's SystemBC coverage and in quarterly leak-site aggregation include Oltenia Energy Complex (Romania — described as a significant portion of national electricity supply, December 2025) and The Adaptavist Group; Comparitech's Q1 2026 healthcare roundup attributes 10 healthcare-sector claims to the operator in the quarter; the operator's leak-site footprint and the absence of an "off-limits" sector convention make hospitals, water utilities, and similar critical-infrastructure targets in-scope. The cross-finding with this week's other concerns: GPO-injected scheduled-task propagation defeats backup-isolation defences if the AD environment is in the encryption path; if the operator's initial-access funnel includes unpatched FortiGate devices, that surface intersects directly with the Polish water-OT NIS2 coverage-gap framing (§ 4, § 6) since small municipal CI operators are over-represented in the unpatched-FortiGate population. Defender priorities for 2026-W20: hunt scheduled tasks in SYSVOL pointing to UNC paths or temp directories; profile SystemBC SOCKS5 beacons; add XChaCha20 file-header pattern detection at backup / DLP tier; re-verify FortiGate patch state against CVE-2024-55591 and any later FortiOS / FortiProxy auth-bypass advisories.