LWA-2026-11424 confirmed malware

timed-assess@1.0.0

Malicious code in timed-assess (npm)

T1059.007 · JavaScriptT1027.004 · Encrypted/Encoded FileT1059 · Command and Scripting Interpreter

Analysis

timed-assess@1.0.0 runs a hidden payload at install. The postinstall hook executes `node apps`, which loads apps/index.js: this reads a bundled file, decrypts it with the hardcoded DES password 'bf497c0b9cee', and pipes the decrypted content into a detached background `node` process (spawn with detached:true, unref) that executes it. The package is presented as a proctoring/assessment tool but its install-time behaviour is decrypt-and-execute of an encrypted blob in a process that outlives the installer. The encrypted payload file is bundled under the package (referenced as public/logo.ico).

analyzed by
Leitwacht
first seen
Aug 18, 2026, 07:00 PM
analyzed
Aug 18, 2026, 07:01 PM

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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.