verify-clinpm
verify-cli is a confirmed malicious npm package (MAL-2026-13882) that opens a backdoor for remote access (malicious version 99.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in verify-cli (npm)
What this malware does
package.json declares preinstall: node index.js, which runs automatically on npm install. index.js shells out via child_process and curl to POST the installer's whoami, hostname, and id output along with base64-encoded contents of /etc/passwd, /etc/hosts, and (if readable) /etc/shadow to a hardcoded out-of-band interactsh/OAST endpoint at 5f8a1ed70fb7761d678agw9bucryyyyyb.oast.site. Package metadata shows an implausible version (99.0.0), placeholder description ("Nodejs SDK for Redacted"), and a nonexistent dependency, consistent with a dependency-confusion / typosquat beacon rather than a legitimate SDK.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for verify-cli (version 99.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging verify-cli across your stack and pipelines.
If you installed it — respond
verify-cli establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If verify-cli 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 verify-cli 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 verify-cli-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.