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Malicious package

@rutxploit-sec/subsplash-cannynpm

Advisory published Updated

@rutxploit-sec/subsplash-canny is a confirmed malicious npm package (MAL-2026-17288) that opens a backdoor for remote access (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @rutxploit-sec/subsplash-canny (npm)

MAL-2026-17288
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @rutxploit-sec/subsplash-canny

What this malware does

npm package @rutxploit-sec/subsplash-canny declares a preinstall lifecycle script that runs node -e inline code reading os.hostname() and os.userInfo().username and issuing an HTTP GET to http://127.0.0.1:8099/ with those values as query parameters, plus a package identifier. The package.json description and README self-describe the artifact as a dependency-confusion proof-of-concept impersonating the private scoped name @subsplash/canny. Installing this package on any machine automatically executes the beacon at install time and transmits the installer's hostname and OS username to the configured endpoint. The current destination is loopback (127.0.0.1:8099), which limits real-world reach in this specific tarball, but the mechanism — arbitrary code execution and identity collection on npm install — is fully wired and would function identically against any remote endpoint.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

dc1ebadea2eb63a0fc7cf7446e36a589c5b87fc7d28e68b68145b98577107ebb

Detection & response playbook

Backdoor / remote access

  1. Find it

    Search your lockfiles and build artifacts for @rutxploit-sec/subsplash-canny (version 1.0.0).

  2. If you installed it — respond

    @rutxploit-sec/subsplash-canny 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 @rutxploit-sec/subsplash-canny 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. @rutxploit-sec/subsplash-canny on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020682

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @rutxploit-sec/subsplash-canny-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
@rutxploit-sec/subsplash-canny (npm) malicious package — MAL-2026-17288 | O3 Security