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Malicious package

ts-logger-packnpm

Malicious code in ts-logger-pack (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-4199
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ts-logger-pack

What this malware does

ts-logger-pack is a malicious npm package that depends on terminal-logger-utils and triggers the malicious behavior in that package when installed or imported.

The terminal-logger-utils payload executes a postinstall hook that opens utils.cjs, an obfuscated malware dropper. The dropper downloads and runs a platform-specific second-stage binary from Hugging Face. The second-stage payload provides keylogger, infostealer, and RAT behavior, steals sensitive local data including Telegram Desktop sessions, browser login databases, crypto wallets, SSH keys, cloud configurations, environment variables, and keyword-matched files, and connects to a remote server for full machine control.

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

1 flagged
1.1.3

Indicators of compromise (SHA-256)

baf23be122d75b0f3bb5c0175a7289155d31570a665037b0b2ba499ae08c661a

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 ts-logger-pack (version 1.1.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging ts-logger-pack across your stack and pipelines.

  2. If you installed it — respond

    ts-logger-pack 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 ts-logger-pack 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 ts-logger-pack 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. ts-logger-pack on npm has been identified as a malicious package (version 1.1.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-8w97-mwv3-cwx3

References

Credits

  • OX Security · finder

Detect & block this

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

ts-logger-pack (npm) malicious package — MAL-2026-4199 | O3 Security