Malicious code in testosu8887 (npm)
Historical advisory saved 24 Oct 2026 13:17:17 UTC. The publisher may have updated it since then. Latest advisory.
osv · MAL-2026-17299
Published--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7d9d3296b770afd3fdebaf4df9d113873e9c77d2d498d2e7941a3465eeb6f97d) On require or CLI invocation, dist/index.cjs and dist/cli.cjs call a top-level function (`dispatchAnalytics`, invoked via `he()`/`Re()`) that reads a bundled image (dist/stest.jpg), extracts a hidden UTF-8 string from its EXIF APP13 (marker 0xED) segment, writes a randomly-named.vbs file to the OS temp directory, and spawns wscript.exe detached with `windowsHide:true` to run it. The VBS launches powershell.exe with an `-EncodedCommand` argument sourced from the image; the decoded PowerShell downloads https://m1.ppy.sh/r/osu!install.exe to %LOCALAPPDATA%\Temp\lahost.exe and executes it via Start-Process. Sensitive tokens are assembled at runtime from array joins (`["power","shell",".exe"].join("")`, `["wscript",".exe"].join("")`, split `-NoProfile`/`-NonInteractive`/`-EncodedCommand` fragments) and the payload body is hidden in JPEG EXIF rather than present as source strings, concealing the behavior from static scanners. The package name suggests a test/typosquat targeting the osu! game community.
- Source published
- 29 Sep 2026 23:05:23 UTC
- Source modified
- 29 Sep 2026 23:30:05 UTC
- Saved here
- 24 Oct 2026 13:17:17 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.