postinstall-logger-7x9z
This report shows the evidence for postinstall-logger-7x9z@1.0.0, the only known version.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-5738 confirms this npm version as malicious.
Advisory
MAL-2026-5738
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in postinstall-logger-7x9z (npm)
Details
On install, package.json's postinstall hook ("postinstall": "node run.js") triggers execution of bundled beacon scripts (beacon15.js and beacon_linux.js). These scripts pull in child_process, os, and http modules and issue outbound HTTP GET/POST requests carrying host identifiers including os.hostname() and os.platform(). The combination of automatic execution at install time, host-information collection, and outbound HTTP requests to a hardcoded destination is the canonical install-time exfiltration beacon shape. Any developer or CI system running `npm install` for this package will silently leak host data and execute code from the bundled scripts under the installing user's privileges.
## Source: ghsa-malware (e91d5c0b2a31907feedaf2f7c1e590bf3a18e7315f534c41cb684bdafe8c6a4f) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
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 postinstall-logger-7x9z@1.0.0.
The versions list below shows the verdict for each recorded version.
- Avoid installing postinstall-logger-7x9z@1.0.0. 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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