etherjs-utilsnpm
Malicious code in etherjs-utils (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
package.json declares a postinstall script that performs an HTTPS GET to an ephemeral pinggy-free.link tunnel URL (rqnyz-2605-7280-7--2000-c51.run.pinggy-free.link/npm/-/binary/telemetry), concatenates the response body, and passes it directly to child_process.exec. This runs unattended during npm install and grants the URL operator arbitrary code execution on every installer's machine. The package's only library code (index.js) is a 156-byte stub re-exporting a thin wrapper around ethers' JsonRpcProvider; the package name 'etherjs-utils' lures users of the popular ethers.js library. The destination is a mutable, anonymous tunnel host with no relationship to any legitimate publisher, no version pinning, and no integrity check on the executed bytes.
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for etherjs-utils (version 1.0.39). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging etherjs-utils across your stack and pipelines.
If you installed it — respond
Remove etherjs-utils 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.
Did it already run?
If etherjs-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.
How O3 protects you
O3 blocks etherjs-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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks etherjs-utils-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.