MAL-2026-17297

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test-agency-assignment-02/MAL-2026-17297.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17297
Published
2026-09-29T23:05:45Z
Modified
2026-09-29T23:30:05Z
Summary
Malicious code in test-agency-assignment-02 (npm)
Details

-= 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.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020692",
            "import_time":  "2026-09-29T23:17:35.356841763Z",
            "modified_time":  "2026-09-29T23:05:45Z",
            "sha256":  "e9944ea8ca21c0670c4b718a12427e8ca7330571ef5a9198a60b05f75038fe73",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.5"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / test-agency-assignment-02

Package

Name
test-agency-assignment-02
View open source insights on deps.dev
Purl
pkg:npm/test-agency-assignment-02

Affected ranges

Affected versions

1.*
1.0.5

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "package.json",
            "sha256":  "ab92d275016fd5c87f726eaacc6d7a83ad87f62002a4cee7a07de79a8ee8ef5c",
            "tlsh":  "01d0a7274945563369f446640935991ab5128f2f51314c0bb2f3651890e37b24889b06"
        },
        {
            "path":  "4444.vbs",
            "sha256":  "89a31ec0719b2137938c892385823ffb993d2d903e1fdfe17b246ba88531609a",
            "tlsh":  "daf4f034658a68abb63bcafeace6c72935147c053040606c35deb6581bfdcd15bda0f8"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "test-agency-assignment-02-1.0.5.tgz",
            "hashes":  {
                "sha1":  "02e66c207376d2e743cca7df0001733c0d24fb53",
                "sha512_sri":  "sha512-pPlsB2BA0XQxORXa91N7mwr/AxfDsnPgfW/jddsANiFpHMcPNP+91cIojl+spJej3DfUTosTyNnV7sbB6hdKBA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test-agency-assignment-02/MAL-2026-17297.json"