MAL-2026-6899 Malicious code in twcompose-utils (npm)

The package's main entry point src/index.js contains heavily obfuscated JavaScript at line 138 using a classic string-array shuffle pattern (while(!![]) loop with repeated 'shift' calls and hex-encoded indices like 0x144, 0x151). Obfuscation of a top-level module is suspicious because it conceals the actual runtime behavior from reviewers; it is also a common shape for legitimate-but-protected commercial code. Without a deobfuscated trace of the control flow, intent cannot be confirmed — there is no direct evidence in the available signals of network exfiltration, credential access, install-time fetch-and-execute, or other concrete installer-harm mechanisms. Routing to human review so a reviewer can deobfuscate src/index.js and determine whether the hidden code performs exfiltration, dropper, or silent-relay behavior versus benign protected logic.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.