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Malicious package

checkout-commit-pos-order-amnpm

checkout-commit-pos-order-am is a confirmed malicious npm package (MAL-2026-12548) that executes malicious code on install (malicious version 35.8.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in checkout-commit-pos-order-am (npm)

MAL-2026-12548
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall checkout-commit-pos-order-am

What this malware does

[email protected] executes a dropper on module load. Its main entry index.js requires _shim.js, which selects a platform-specific asset path and downloads an opaque native binary over HTTPS from hardcoded oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, and oob-worker.cf103-070.workers.dev hosts, with a DNS TXT-record fallback that reassembles base64 chunks from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Destination hostnames and the child_process require are built at runtime by joining fragmented substrings to evade static scanners. The downloaded bytes are written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows (disguised filenames), chmod 0755, and spawned detached via /bin/sh -c "<path> &" or cmd.exe /c start /b. A parallel dropper with the same download-chmod-spawn shape is bundled as lib/telemetry.js (~81KB) under an analytics-SDK cover story and is not currently wired from the entry points but ships in the tarball.

Malicious versions

1 flagged
35.8.4

Indicators of compromise (SHA-256)

732c6bcc33ca109e02cca656cb0f2324504d3bc3176cff55420b4705990a62e8

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for checkout-commit-pos-order-am (version 35.8.4). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging checkout-commit-pos-order-am across your stack and pipelines.

  2. If you installed it — respond

    Remove checkout-commit-pos-order-am from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If checkout-commit-pos-order-am was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks checkout-commit-pos-order-am before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. checkout-commit-pos-order-am on npm has been identified as a malicious package (version 35.8.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015219

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks checkout-commit-pos-order-am-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

checkout-commit-pos-order-am (npm) malicious package — MAL-2026-12548 | O3 Security