Malicious code in pixel-map-testmetest (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

pixel-map-testmetest 0.0.1 and 0.0.2 ship a rebuild of the data-pipeline-testmetest 2.0.1 credential stealer and run it on `npm install`: their `binding.gyp` source `<!(env node index.js >/dev/null 2>&1; echo stub.c)` makes node-gyp run `index.js`, which decrypts `data.bin` and pipes it into Bun. The package.json poses as an npm staged-publishing placeholder (`"stub": true`, "Temporary package placeholder for staged publishing"). Published by npm account `newtestnewdont` on 2026-10-21 after a benign 1.0.0; the same account published benign-looking color-utils-testmetest, string-helpers-testmetest and byte-stride-testmetest. 0.0.2 (published 3.5 hours after 0.0.1) is the same loader and hook with a re-encrypted, additionally obfuscated payload. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (65072803ff6a65eee326b518b2039415559b4f8582f44b2f2af2f871aea9f39e) On npm install, node-gyp automatically processes binding.gyp. The binding.gyp here declares target type 'none' with no C/C++ sources and abuses GYP command-expansion `<!(env node index.js...; echo stub.c)` to execute index.js at install time. index.js is a Caesar-cipher/charcode-obfuscated loader wrapped in eval that AES-128-GCM-decrypts a 319 KB sibling blob (data.bin) using hex key/iv/aad hardcoded in the loader, brotli-decompresses the result, writes it into a mkdtemp'd `.b-<rand>` directory, and spawns the Bun runtime (declared as an npm dependency `bun ^1.2.18`) to execute the dropped file, bypassing Node-based inspection. package.json sets `stub: true` with description 'Temporary package placeholder for staged publishing' and the README claims a holding version, yet the tarball ships the obfuscated loader, the encrypted blob, the binding.gyp install hook, and the alternate runtime — the stated purpose contradicts the shipped behavior. The actual payload bytes are not inspectable statically; the combination of install-time execution, multi-layer obfuscation, hardcoded-key AES-encrypted blob, drop-to-temp, and alternate-runtime execution matches the npm alternate-runtime dropper pattern.

Source published

21 Oct 2026 18:00:00 UTC

Source modified

22 Oct 2026 06:45:05 UTC

Observed 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

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.