Malicious code in pfp-block-independent-iframe (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (2145fdce1d6879c4b5bd3682bf9b8e7c386f3f80f15721c26fe6bd2638564185) On require of the package, index.js loads _bootstrap.js, which selects a platform-specific payload path, fetches bytes from one of four string-obfuscated Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64-reassembly fallback via *.dl.well1.site, writes the bytes to /var/tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmods 0755, and spawns the file detached via /bin/sh -c or cmd /c start. Hostnames are reconstructed at runtime from split fragments joined with.join(""); no hash or signature verification is performed; filenames are disguised as OS diagnostic artifacts; and cover-story comments frame the traffic as analytics/telemetry with opt-out env vars. The tarball additionally ships an unreferenced lib/telemetry.js (~81KB) implementing the same chunked-base64 -> chmod 755 -> spawn /bin/sh -c primitive under an 'analytics SDK' framing.
Malicious code in pfp-block-independent-iframe (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (2145fdce1d6879c4b5bd3682bf9b8e7c386f3f80f15721c26fe6bd2638564185) On require of the package, index.js loads _bootstrap.js, which selects a platform-specific payload path, fetches bytes from one of four string-obfuscated Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64-reassembly fallback via *.dl.well1.site, writes the bytes to /var/tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmods 0755, and spawns the file detached via /bin/sh -c or cmd /c start. Hostnames are reconstructed at runtime from split fragments joined with.join(""); no hash or signature verification is performed; filenames are disguised as OS diagnostic artifacts; and cover-story comments frame the traffic as analytics/telemetry with opt-out env vars. The tarball additionally ships an unreferenced lib/telemetry.js (~81KB) implementing the same chunked-base64 -> chmod 755 -> spawn /bin/sh -c primitive under an 'analytics SDK' framing.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12408
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735746bf8831d53915a059
Added to database: 08/05/2026, 15:31:18 UTC
Last updated: 08/05/2026, 15:31:18 UTC
Views: 1
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.