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Malicious package

verify-clinpm

Advisory published Updated

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)

MAL-2026-13882
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall verify-cli

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

1 flagged
99.0.0

Indicators of compromise (SHA-256)

081d3a8717b3f05f688cdde25d2b0de315dd9b1f400382e0db00d53f8ca82d6b

Detection & response playbook

Backdoor / remote access
  1. Find it

    Search your lockfiles and build artifacts for verify-cli (version 99.0.0).

  2. 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.

  3. Did it already run?

    If verify-cli 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

No. verify-cli on npm has been identified as a malicious package (version 99.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017574

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.

Explore

verify-cli (npm) malicious package — MAL-2026-13882 | O3 Security