siren-lamentnpm
Advisory published Updated
siren-lament is a confirmed malicious npm package (MAL-2025-49247) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.0-stage, 2.14.822, 2.14.824…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in siren-lament (npm)
What this malware does
The package contains two files and declares no lifecycle scripts, remote fetches, credential reads, or network exfiltration paths. Version coordinate 0.0.0-stage and minimal file count are consistent with a placeholder or staging publish rather than a functional library. No code paths that would compromise an installer on npm install or require() were identified.
The OpenSSF Package Analysis project identified 'siren-lament' @ 2.14.827 (npm) as malicious.
It is considered malicious because:
- The package executes one or more commands associated with malicious behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for siren-lament (4 malicious versions).
If you installed it — respond
siren-lament 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.
Did it already run?
If siren-lament was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks siren-lament-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.