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Malicious package

twcompose-utilsnpm

twcompose-utils is a confirmed malicious npm package (MAL-2026-6899) that steals credentials and exfiltrates sensitive data (malicious versions 0.7.6, 0.7.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in twcompose-utils (npm)

MAL-2026-6899
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall twcompose-utils

What this malware does

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.

Malicious versions

2 flagged
0.7.60.7.7

Indicators of compromise (SHA-256)

f7343cf823749e49d695e0bb3994098d181d26e6005e2c2dc2dadc45cae2ee33
096d151917a14021013de8dbd595466944a677be49ee8ca4b3ed94de63d85cd9
4a7ac7b9adc8c89251291fa9d29ed01b75b46bde2f490c102a82acddfa36fc9c

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for twcompose-utils (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging twcompose-utils across your stack and pipelines.

  2. If you installed it — respond

    twcompose-utils is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If twcompose-utils 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.

  4. How O3 protects you

    O3 blocks twcompose-utils 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

No. twcompose-utils on npm has been identified as a malicious package (versions 0.7.6, 0.7.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-pc7p-pxpj-3cw5IN-MAL-2026-009196IN-MAL-2026-009194

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks twcompose-utils-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

twcompose-utils (npm) malicious package — MAL-2026-6899 | O3 Security