npm-rce-pocnpm
Malicious code in npm-rce-poc (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
Package declares a postinstall lifecycle script that, on npm install, fetches a script over plain HTTP from a hardcoded bare IP (http://115.190.124.243:8761/slt on Unix,.../swt on Windows) and immediately executes it — piping to sh on Unix and writing to C:\Users\Public\run.bat via certutil then invoking it on Windows. The package presents itself as date-fns-lite, a lookalike of the popular date-fns library, and ships a benign-looking date-formatting index.js as cover; the actual behavior is an install-time dropper that hands remote code execution to the operator of 115.190.124.243 against every installer. No pinning, no integrity check, no TLS.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for npm-rce-poc (version 1.0.13). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging npm-rce-poc across your stack and pipelines.
If you installed it — respond
npm-rce-poc is a typosquat — you almost certainly intended a legitimately-named package. Remove npm-rce-poc, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If npm-rce-poc 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 npm-rce-poc 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 npm-rce-poc-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.