blotsnpm
blots is a confirmed malicious npm package (MAL-2026-11158) that executes malicious code on install (malicious versions 2.1.0, 2.1.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in blots (npm)
What this malware does
package.json defines preinstall and postinstall lifecycle scripts that unconditionally run curl against a hardcoded webhook.site endpoint, transmitting the installer's username (whoami), hostname, current working directory, and timestamp as query parameters. The endpoint is a third-party request-capture service controlled by the author (https://webhook.site/d80b4602-8a87-4693-8510-6ff77c62788e/blots). The package ships no other functionality tied to a documented purpose; the sole install-time effect is reconnaissance of the installer's host and identity to an attacker-controlled destination.
The OpenSSF Package Analysis project identified 'blots' @ 2.1.0 (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
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for blots (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging blots across your stack and pipelines.
If you installed it — respond
Remove blots 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 blots 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 blots 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
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks blots-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.