Malicious code in statist-browser-typed-client-mb.product.mclaccount (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1381b3c1cd52acc110406d4609b7afea6e0681e3fe1259fcff0cd0a819aacabc) On require, index.js loads _loader.js which selects a platform-specific binary path, fetches bytes from obfuscated Cloudflare Workers endpoints (oob-worker.cf102-baf.workers.dev, cf100-416/cf103-070/cf99-9b3.workers.dev) with a DNS TXT-record fallback channel across numbered subdomains of dl.well1.site (tin, tina, ldr, win) that reassembles a base64 payload. The downloaded bytes are written to /tmp or %TEMP% under disguised names (.cache_<rand>, dotnet_diag_<rand>.exe), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Hostnames and API names are reconstructed via split-string joins (e.g. ['tin.','dl.well1.si','te'].join(''), require('child_'+'process')) to evade static analysis. A parallel implementation of the same dropper is shipped as lib/telemetry.js under an 'analytics SDK' cover story, with identical DNS-TXT reassembly, chmod 0755, and detached /bin/sh execution. ## Source: ghsa-malware (21bc192595c845c8870559d0575b69c158b6441912ceed68a263730b683d180a) 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 threat involves a malicious npm package (statist-browser-typed-client-mb.product.mclaccount) at version 20.2.6 that, when loaded, fetches obfuscated payloads from Cloudflare Workers endpoints and DNS TXT-record fallback channels. The payloads are base64 reassembled, saved to temporary locations with disguised names, permissioned for execution, and launched detached via shell commands. The code uses string splitting and joining to reconstruct hostnames and API names to evade detection. A similar dropper exists in a telemetry.js module under the guise of an analytics SDK, employing the same techniques for payload delivery and execution.
Potential Impact
The malicious package can execute arbitrary code on the host system by downloading and running binaries without user consent. This can lead to unauthorized code execution, potential system compromise, and persistence through disguised payloads. The obfuscation and use of multiple delivery channels complicate detection and analysis.
Mitigation Recommendations
No official patch or remediation guidance is provided. Users should avoid using version 20.2.6 of the statist-browser-typed-client-mb.product.mclaccount package. Remove any installations of this package and scan affected systems for the presence of the described payload files and processes. Monitor for suspicious network connections to the indicated Cloudflare Workers endpoints and dl.well1.site subdomains. Employ runtime protection to detect and block execution of unexpected binaries from temporary directories.
Malicious code in statist-browser-typed-client-mb.product.mclaccount (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1381b3c1cd52acc110406d4609b7afea6e0681e3fe1259fcff0cd0a819aacabc) On require, index.js loads _loader.js which selects a platform-specific binary path, fetches bytes from obfuscated Cloudflare Workers endpoints (oob-worker.cf102-baf.workers.dev, cf100-416/cf103-070/cf99-9b3.workers.dev) with a DNS TXT-record fallback channel across numbered subdomains of dl.well1.site (tin, tina, ldr, win) that reassembles a base64 payload. The downloaded bytes are written to /tmp or %TEMP% under disguised names (.cache_<rand>, dotnet_diag_<rand>.exe), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Hostnames and API names are reconstructed via split-string joins (e.g. ['tin.','dl.well1.si','te'].join(''), require('child_'+'process')) to evade static analysis. A parallel implementation of the same dropper is shipped as lib/telemetry.js under an 'analytics SDK' cover story, with identical DNS-TXT reassembly, chmod 0755, and detached /bin/sh execution. ## Source: ghsa-malware (21bc192595c845c8870559d0575b69c158b6441912ceed68a263730b683d180a) 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 threat involves a malicious npm package (statist-browser-typed-client-mb.product.mclaccount) at version 20.2.6 that, when loaded, fetches obfuscated payloads from Cloudflare Workers endpoints and DNS TXT-record fallback channels. The payloads are base64 reassembled, saved to temporary locations with disguised names, permissioned for execution, and launched detached via shell commands. The code uses string splitting and joining to reconstruct hostnames and API names to evade detection. A similar dropper exists in a telemetry.js module under the guise of an analytics SDK, employing the same techniques for payload delivery and execution.
Potential Impact
The malicious package can execute arbitrary code on the host system by downloading and running binaries without user consent. This can lead to unauthorized code execution, potential system compromise, and persistence through disguised payloads. The obfuscation and use of multiple delivery channels complicate detection and analysis.
Mitigation Recommendations
No official patch or remediation guidance is provided. Users should avoid using version 20.2.6 of the statist-browser-typed-client-mb.product.mclaccount package. Remove any installations of this package and scan affected systems for the presence of the described payload files and processes. Monitor for suspicious network connections to the indicated Cloudflare Workers endpoints and dl.well1.site subdomains. Employ runtime protection to detect and block execution of unexpected binaries from temporary directories.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12447
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735746bf8831d539159f85
Added to database: 08/05/2026, 15:31:18 UTC
Last enriched: 08/05/2026, 17:28:04 UTC
Last updated: 09/07/2026, 22:12:28 UTC
Views: 18
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