commandorjsnpm
commandorjs is a confirmed malicious npm package (MAL-2026-14174) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in commandorjs (npm)
What this malware does
[email protected] is a dropper disguised as an npm library. Its index.js exports an empty object; the only functional code is scripts/postinstall.js, which runs automatically on npm install. The postinstall script POSTs a JSON payload with platform/arch/node info to a hardcoded plain-HTTP endpoint at 193.70.34.101:20099/vote (host assembled from a split integer array). It then XOR-decodes obfuscated blobs (ADDON_ENC, BRIDGE_LAUNCHER_ENC, BRIDGE_SCRIPT_PRE_ENC, BRIDGE_SCRIPT_POST_ENC) using the 7-byte key 'stf2026' to reconstruct a github.com download URL and shell launcher commands. On Windows it downloads the decoded binary to %TEMP%/main.exe and launches it detached; on WSL/virtualized Linux it executes a decoded PowerShell-style bridge command to run the Windows payload on the host. URL and shell-command obfuscation, bare-IP plain-HTTP telemetry, write-to-temp with detached exec, and a WSL-to-Windows-host bridge together form an install-time remote-code-execution dropper.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for commandorjs (version 1.0.0).
If you installed it — respond
Remove commandorjs 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 commandorjs was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks commandorjs-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.