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)
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind 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.
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.
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.
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
Campaign
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.