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Malicious package

@klapp-about/routesnpm

Malicious code in @klapp-about/routes (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-5411
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @klapp-about/routes

What this malware does

On npm install, the package's preinstall hook (node index.js) collects host and user identity data — os.hostname(), os.userInfo().username, __dirname, process.cwd(), pid, node version, platform, and architecture — and ships them to two attacker-controlled destinations: (a) an HTTP POST to a bare IP http://172.201.213.59:9090/cb/klapp-about-routes carrying the collected fields as JSON, and (b) a hex-encoded DNS lookup to *.d8jbmnsqcfu78dfs8vdg34ohqhirb4pbg.oast.live (interactsh out-of-band callback). The package name @klapp-about/routes and the unusually high version 99.0.0 are the canonical shape of a dependency-confusion attack — an internal-looking scope published to public npm at a version high enough to override a private resolver. Self-description as a 'security research / dependency-confusion PoC' does not change installer-side impact: any developer or CI system that misroutes installs to the public registry has their machine fingerprint shipped to the hardcoded IP and DNS callback service without consent.

Malicious versions

3 flagged
99.0.099.0.199.0.2

Indicators of compromise (SHA-256)

3a89d8d92c1d5303d17c64a14353dfd86d738d620129a830af3684b6ab2e2167
99d2936e8940c6e62254cb8aefb5220dad856de80e50243788f3282e17035c10
dd5d030db916b2c1fcac6ca8ebaa5415eae8a32ad67a5104b78a17d535111a10
fbc76fb74ca69f4553d9ffdb5b337805879b2a9d689fef836fb3b23e18a34482
715f07e0a1984fc9eb7d6432fc2491b08139755426b3c8905ba2d9274e2d4875
d37bd4622a778532f5476c87ebbe915d7d07d5ae30bf817d52ebdad17154c789

Frequently asked questions

No. @klapp-about/routes on npm has been identified as a malicious package (versions 99.0.0, 99.0.1, 99.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-005097IN-MAL-2026-005074IN-MAL-2026-005073IN-MAL-2026-005098IN-MAL-2026-005138IN-MAL-2026-005139

References

Credits

  • Amazon Inspector · finder

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Supply-chain protection
@klapp-about/routes (npm) malicious package — MAL-2026-5411 | O3 Security