elf-stats-sleighing-mailbag-621npm
Advisory published Updated
elf-stats-sleighing-mailbag-621 is a confirmed malicious npm package (MAL-2025-192275) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in elf-stats-sleighing-mailbag-621 (npm)
What this malware does
The package elf-stats-sleighing-mailbag-621 was found to contain malicious code.
The OpenSSF Package Analysis project identified 'elf-stats-sleighing-mailbag-621' @ 1.0.0 (npm) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for elf-stats-sleighing-mailbag-621 (version 1.0.0).
If you installed it — respond
Remove elf-stats-sleighing-mailbag-621 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 elf-stats-sleighing-mailbag-621 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
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
- ReversingLabs · finder
Detect & block this
O3 blocks elf-stats-sleighing-mailbag-621-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.