Malicious code in test-agency-assignment-02 (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (e9944ea8ca21c0670c4b718a12427e8ca7330571ef5a9198a60b05f75038fe73) The tarball contains only package.json and 4444.vbs; the declared main entry (index.js) is absent. package.json defines a postinstall script `wscript.exe 4444.vbs`, so on `npm install` on Windows the VBScript executes automatically. 4444.vbs is heavily obfuscated (colon-delimited XOR-encoded CreateObject strings, embedded AES S-box and ChaCha20-IETF routines, and 600+ base64 fragments reconstructed at runtime) and presents cover strings identifying itself as `Device Telemetry Aggregator / Verdant Signals Corp.`. It reconstructs an encrypted payload, writes it to %TEMP% as a `pf*.dat` file, and invokes powershell.exe to perform process hollowing of the decoded loader. The package ships no library code — its only reachable behavior is the install-time dropper.
MAL-2026-17297
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:MAL-2026-17297
test-agency-assignment-02
Source reference: /affected/0/package/name
- Affected versions
- 1.0.5
Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"package": {
"name": "test-agency-assignment-02",
"purl": "pkg:npm/test-agency-assignment-02",
"ecosystem": "npm"
},
"versions": [
"1.0.5"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
}
],
"source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test-agency-assignment-02/MAL-2026-17297.json",
"indicators": {
"evidence_files": [
{
"path": "package.json",
"tlsh": "01d0a7274945563369f446640935991ab5128f2f51314c0bb2f3651890e37b24889b06",
"sha256": "ab92d275016fd5c87f726eaacc6d7a83ad87f62002a4cee7a07de79a8ee8ef5c"
},
{
"path": "4444.vbs",
"tlsh": "daf4f034658a68abb63bcafeace6c72935147c053040606c35deb6581bfdcd15bda0f8",
"sha256": "89a31ec0719b2137938c892385823ffb993d2d903e1fdfe17b246ba88531609a"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "02e66c207376d2e743cca7df0001733c0d24fb53",
"sha512_sri": "sha512-pPlsB2BA0XQxORXa91N7mwr/AxfDsnPgfW/jddsANiFpHMcPNP+91cIojl+spJej3DfUTosTyNnV7sbB6hdKBA=="
},
"filename": "test-agency-assignment-02-1.0.5.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #32236 · Revision 1
- Added to Heist Feed
- Publisher date