OSV Malicious Advisory
scanned 3h ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-10564 confirms this npm version as malicious. On `npm install`, the package's postinstall script (postinstall.js) reads `os.hostname()` and sends it as a query parameter in a plain-HTTP GET to a hardcoded bare IP: `http://37.60.255.218/skybackground.png?display=<hostname>`. The response body is piped to `downloaded-image.jpg` in the package directory, with redirects followed without validation, staging attacker-controlled bytes on disk...
Advisory
MAL-2026-10564
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in micro-ui-loader (npm)
Details
On `npm install`, the package's postinstall script (postinstall.js) reads `os.hostname()` and sends it as a query parameter in a plain-HTTP GET to a hardcoded bare IP: `http://37.60.255.218/skybackground.png?display=<hostname>`. The response body is piped to `downloaded-image.jpg` in the package directory, with redirects followed without validation, staging attacker-controlled bytes on disk. The package's advertised purpose is inconsistent across artifacts — README presents it as 'Simple Text Utils' (capitalize/reverse/wordCount), package.json describes an 'image downloader', and the exported API is only `downloadImage`. The author is the placeholder string 'Your Name'. The combination of an unsolicited installer-identifying beacon to a bare-IP HTTP endpoint at lifecycle time, attacker-controlled byte staging, and a cover-story mismatch is the install-time reconnaissance pattern.
## Source: ghsa-malware (e69a48c7b693baaeff967d17d0e5c3d2b63264a12626f746d5988ad26f0a4823) 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.
Decision reason
OpenSSF Malicious Packages via OSV confirms micro-ui-loader@2.0.0 as malicious (MAL-2026-10564): Malicious code in micro-ui-loader (npm)
References
Source & flagged code
0 flaggedNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory