MAL-2026-14168
Malicious code in chalk-util (npm)
Details
--- _-= Per source details. Do not edit below this line.=-_
## Source: amazon-inspector (4a61959df09375862d2802f22d92ed1a26066bf2ddc2618b76f89666567a91f4) chalk-util@1.0.0 is a typosquat of chalk whose index.js exports an empty object; the package's only functional code is scripts/postinstall.js. On npm install, postinstall XOR-decodes an obfuscated URL (key 'stf2026') pointing to an https://github.com/... asset, downloads it to %TEMP%\main.exe on Windows (and via a decoded PowerShell bridge command on WSL-detected Linux, identified through /proc/version), and spawns it detached with a hidden window. The same postinstall reconstructs the bare IP 193.70.34.101 via ['193','70','34','101'].join('.') and POSTs a JSON body containing the resolved platform label to http://193.70.34.101:20099/vote over plain HTTP as an install beacon. Four separate byte-array constants (ADDON_ENC, BRIDGE_LAUNCHER_ENC, BRIDGE_SCRIPT_PRE_ENC, BRIDGE_SCRIPT_POST_ENC) are XOR-decoded at runtime to hide the fetch URL and the shell command passed to exec(). The auto-execute-on-default-install gate is satisfied via the postinstall lifecycle hook; the fetched binary contents are attacker-controlled and unverified.
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Affected packages
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