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Malicious package

etherresnpm

etherres is a confirmed malicious npm package (MAL-2025-19891) that executes malicious code on install (malicious version 6.15.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in etherres (npm)

MAL-2025-19891
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall etherres

What this malware does

The package etherres was found to contain malicious code.

Malicious versions

1 flagged
6.15.0

Indicators of compromise (SHA-256)

7bbb431a2fceb42e01e40ab0108605c2b3391b7eb49b3d5e43b0b8b9bbe3beb5
034d70113554d02b7eac74bdba44ec4e0d271c688587413bec3f1292059e738d

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 etherres (version 6.15.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging etherres across your stack and pipelines.

  2. If you installed it — respond

    Remove etherres 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 etherres 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 etherres 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. etherres on npm has been identified as a malicious package (version 6.15.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-04517RLUA-2025-05790

References

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks etherres-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.

Explore

etherres (npm) malicious package — MAL-2025-19891 | O3 Security