Malicious code in pfp-block-mobile-past-meetup-list (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cf58f1cbe01e2a0634ec464f040fc08dadf2df035af8c8a68d1fea1d51f10a85) On require() of pfp-block-mobile-past-meetup-list, index.js loads _ext.js which runs a bootstrap routine. It fetches a platform-specific binary via https.get from one of three Cloudflare Workers hosts (oob-worker.cf1-03-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked fallback resolved through tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched payload is written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. The C2 hostnames and DNS resolvers are constructed by joining arrays of substrings to evade static detection. Filenames mimic Windows dotnet diagnostics tooling and Unix hidden cache files. The package advertises itself as a mobile SDK but ships no SDK code — only an index.js stub and the _ext.js dropper. Environment checks against DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK and a /tmp stamp file provide analytics cover. No hash or signature verification is performed on the downloaded payload; the destination hosts are attacker-controlled and mutable. ## Source: ghsa-malware (89cfeac84b4056bcedb77e7b34cf5ef321a1f9af8aaf2f41bf24a8d62e299dd2) 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
The pfp-block-mobile-past-meetup-list npm package version 20.5.1 includes an index.js stub and a _ext.js dropper that fetches a platform-specific binary payload from multiple attacker-controlled Cloudflare Workers domains. The payload is downloaded via HTTPS and a DNS-TXT fallback mechanism, saved to temporary directories on Unix or Windows systems with filenames resembling legitimate diagnostic tools, and executed detached via shell commands. The package performs environment checks to disable telemetry and uses obfuscation to evade static detection. No hash or signature verification is performed on the downloaded payload, allowing arbitrary code execution from mutable attacker-controlled hosts. The package falsely advertises itself as a mobile SDK but contains no SDK code.
Potential Impact
This malicious package enables remote code execution on systems that install and run it by downloading and executing arbitrary binaries from attacker-controlled infrastructure. The lack of integrity checks on the payload and the use of obfuscated network and file operations increase the risk of undetected compromise. The execution of detached processes with attacker payloads can lead to persistent and stealthy footholds on affected systems.
Mitigation Recommendations
No official patch or remediation guidance is currently available for this malicious package. Users should immediately remove pfp-block-mobile-past-meetup-list version 20.5.1 from their environments and avoid installing it. Review dependency trees to ensure this package is not included transitively. Employ supply chain security best practices such as verifying package provenance and using trusted package sources. Monitor for suspicious activity related to the described network domains and file artifacts.
Malicious code in pfp-block-mobile-past-meetup-list (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cf58f1cbe01e2a0634ec464f040fc08dadf2df035af8c8a68d1fea1d51f10a85) On require() of pfp-block-mobile-past-meetup-list, index.js loads _ext.js which runs a bootstrap routine. It fetches a platform-specific binary via https.get from one of three Cloudflare Workers hosts (oob-worker.cf1-03-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked fallback resolved through tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched payload is written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. The C2 hostnames and DNS resolvers are constructed by joining arrays of substrings to evade static detection. Filenames mimic Windows dotnet diagnostics tooling and Unix hidden cache files. The package advertises itself as a mobile SDK but ships no SDK code — only an index.js stub and the _ext.js dropper. Environment checks against DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK and a /tmp stamp file provide analytics cover. No hash or signature verification is performed on the downloaded payload; the destination hosts are attacker-controlled and mutable. ## Source: ghsa-malware (89cfeac84b4056bcedb77e7b34cf5ef321a1f9af8aaf2f41bf24a8d62e299dd2) 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
The pfp-block-mobile-past-meetup-list npm package version 20.5.1 includes an index.js stub and a _ext.js dropper that fetches a platform-specific binary payload from multiple attacker-controlled Cloudflare Workers domains. The payload is downloaded via HTTPS and a DNS-TXT fallback mechanism, saved to temporary directories on Unix or Windows systems with filenames resembling legitimate diagnostic tools, and executed detached via shell commands. The package performs environment checks to disable telemetry and uses obfuscation to evade static detection. No hash or signature verification is performed on the downloaded payload, allowing arbitrary code execution from mutable attacker-controlled hosts. The package falsely advertises itself as a mobile SDK but contains no SDK code.
Potential Impact
This malicious package enables remote code execution on systems that install and run it by downloading and executing arbitrary binaries from attacker-controlled infrastructure. The lack of integrity checks on the payload and the use of obfuscated network and file operations increase the risk of undetected compromise. The execution of detached processes with attacker payloads can lead to persistent and stealthy footholds on affected systems.
Mitigation Recommendations
No official patch or remediation guidance is currently available for this malicious package. Users should immediately remove pfp-block-mobile-past-meetup-list version 20.5.1 from their environments and avoid installing it. Review dependency trees to ensure this package is not included transitively. Employ supply chain security best practices such as verifying package provenance and using trusted package sources. Monitor for suspicious activity related to the described network domains and file artifacts.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12409
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735745bf8831d539159ee5
Added to database: 08/05/2026, 15:31:17 UTC
Last enriched: 08/05/2026, 17:23:01 UTC
Last updated: 09/18/2026, 02:24:10 UTC
Views: 18
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