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OpenAdvisories
Malicious MAL-2026-12627

claims-jira-service

npm package · versions 35.8.3

Reported Aug 5, 2026 · Updated Aug 5, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (666343795502690c0582b4b73652c215ad8f5025ca586d255e94910e8dd59744)
On require('claims-jira-service'), index.js loads _ext.js which downloads a platform-specific executable from author-controlled hosts assembled at runtime by Array.join string-splitting (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS TXT record fallback under *.dl.wel1.ru. The fetched bytes are written to a temp directory under disguised names (.cache_<hex>, dotnet_diag_<hex>.exe), chmod 0755, and spawned detached via /bin/sh -c or cmd. A stamp file with a benign name (.analytics_state) is used to throttle re-execution. Hostnames and payload paths are split across string arrays to defeat static analysis, and DNS-TXT chunking is used as a covert transport channel.