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Malicious package

karemm2npm

Malicious code in karemm2 (npm) Remove it immediately and rotate any exposed credentials.

MAL-2025-191964
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall karemm2

What this malware does

The package karemm2 was found to contain malicious code.

The OpenSSF Package Analysis project identified 'karemm2' @ 1.0.0 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

  • The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

4b8bdcb09150b560d85e5ddba2a0f76f1f26e6a330c437c93d4cd8b7560a2d28
bdd5f17df1d0a4a9093ad436f4dafa59a288c2c650f7f1dff5cd36af67b5e98f

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for karemm2 (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging karemm2 across your stack and pipelines.

  2. If you installed it — respond

    Remove karemm2 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If karemm2 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 karemm2 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. karemm2 on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

  • Amazon Inspector · finder
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks karemm2-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

karemm2 (npm) malicious package — MAL-2025-191964 | O3 Security