Malicious code in statist-browser-typed-client-coretech.web.metrics (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9b9b2b7ac37cfa02ac91bf79f3ca153bd19923ba95468f5a747de47f82ebf828) On require() of the package, _init.js selects a platform-specific asset, fetches an opaque binary via https.get from one of three hardcoded Cloudflare workers.dev hosts whose names are reconstructed from split-string arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /var/tmp or %TEMP% under a disguised name (.cache_<rnd> on Unix, dotnet_diag_<rnd>.exe on Windows), chmods 0755, and spawns it detached via spawn('/bin/sh',['-c',fp+' &']) or spawn('cmd',...). A DNS-TXT fallback channel resolves numbered subdomains under dl.well1.site (also assembled from fragmented array joins) and base64-decodes the concatenated TXT records when HTTPS retrieval fails. A hidden stamp file (.analytics_state) with a ~6.3-hour TTL throttles re-execution to establish recurring background execution, and the code short-circuits only on well-known opt-out envs (DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK), impersonating legitimate telemetry artifacts. The package name and telemetry cover story do not match the observed behavior: fetching opaque attacker bytes and executing them detached is a canonical binary-runner dropper. ## Source: ghsa-malware (90cc41b3eebdcc98e1029c6bd67225397224c7bc14806958720846c4905946c7) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
AI Analysis
Technical Summary
This malicious npm package, identified as 'statist-browser-typed-client-coretech.web.metrics' version 20.1.8, upon being required, selects a platform-specific asset and fetches an opaque binary payload from one of three hardcoded Cloudflare workers.dev domains. It writes the payload to a disguised file in temporary storage, sets executable permissions, and spawns it detached via shell commands. If HTTPS retrieval fails, it uses a DNS TXT record fallback mechanism to obtain a base64-encoded payload. A hidden '.analytics_state' stamp file with a ~6.3-hour TTL limits repeated execution to maintain persistent background activity. The package's behavior is disguised under a telemetry cover story and respects environment variables that opt out of telemetry, thereby evading some detection methods.
Potential Impact
The package enables remote code execution by downloading and running attacker-controlled binaries on the host system. This can lead to unauthorized system compromise, persistent backdoors, data exfiltration, or further malware deployment. The use of legitimate telemetry impersonation and fallback mechanisms increases stealth and persistence, complicating detection and removal.
Mitigation Recommendations
No official patch or remediation is currently available for this malicious package. Users should immediately remove the package version 20.1.8 from their environments and avoid installing it. Employ supply chain security measures such as verifying package provenance and using trusted sources. Monitor for any unauthorized execution of binaries from temporary directories and consider blocking network access to the identified Cloudflare worker domains and the dl.well1.site domain. Patch status is not yet confirmed — check vendor advisories or trusted security sources for updates.
Malicious code in statist-browser-typed-client-coretech.web.metrics (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9b9b2b7ac37cfa02ac91bf79f3ca153bd19923ba95468f5a747de47f82ebf828) On require() of the package, _init.js selects a platform-specific asset, fetches an opaque binary via https.get from one of three hardcoded Cloudflare workers.dev hosts whose names are reconstructed from split-string arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /var/tmp or %TEMP% under a disguised name (.cache_<rnd> on Unix, dotnet_diag_<rnd>.exe on Windows), chmods 0755, and spawns it detached via spawn('/bin/sh',['-c',fp+' &']) or spawn('cmd',...). A DNS-TXT fallback channel resolves numbered subdomains under dl.well1.site (also assembled from fragmented array joins) and base64-decodes the concatenated TXT records when HTTPS retrieval fails. A hidden stamp file (.analytics_state) with a ~6.3-hour TTL throttles re-execution to establish recurring background execution, and the code short-circuits only on well-known opt-out envs (DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK), impersonating legitimate telemetry artifacts. The package name and telemetry cover story do not match the observed behavior: fetching opaque attacker bytes and executing them detached is a canonical binary-runner dropper. ## Source: ghsa-malware (90cc41b3eebdcc98e1029c6bd67225397224c7bc14806958720846c4905946c7) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This malicious npm package, identified as 'statist-browser-typed-client-coretech.web.metrics' version 20.1.8, upon being required, selects a platform-specific asset and fetches an opaque binary payload from one of three hardcoded Cloudflare workers.dev domains. It writes the payload to a disguised file in temporary storage, sets executable permissions, and spawns it detached via shell commands. If HTTPS retrieval fails, it uses a DNS TXT record fallback mechanism to obtain a base64-encoded payload. A hidden '.analytics_state' stamp file with a ~6.3-hour TTL limits repeated execution to maintain persistent background activity. The package's behavior is disguised under a telemetry cover story and respects environment variables that opt out of telemetry, thereby evading some detection methods.
Potential Impact
The package enables remote code execution by downloading and running attacker-controlled binaries on the host system. This can lead to unauthorized system compromise, persistent backdoors, data exfiltration, or further malware deployment. The use of legitimate telemetry impersonation and fallback mechanisms increases stealth and persistence, complicating detection and removal.
Mitigation Recommendations
No official patch or remediation is currently available for this malicious package. Users should immediately remove the package version 20.1.8 from their environments and avoid installing it. Employ supply chain security measures such as verifying package provenance and using trusted sources. Monitor for any unauthorized execution of binaries from temporary directories and consider blocking network access to the identified Cloudflare worker domains and the dl.well1.site domain. Patch status is not yet confirmed — check vendor advisories or trusted security sources for updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12444
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735750bf8831d53915a61a
Added to database: 08/05/2026, 15:31:28 UTC
Last enriched: 08/05/2026, 17:50:01 UTC
Last updated: 09/14/2026, 07:18:20 UTC
Views: 24
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