MAL-2026-12548

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-commit-pos-order-am/MAL-2026-12548.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12548
Published
2026-08-05T14:14:04Z
Modified
2026-08-05T14:35:18.058034984Z
Summary
Malicious code in checkout-commit-pos-order-am (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (732c6bcc33ca109e02cca656cb0f2324504d3bc3176cff55420b4705990a62e8)

checkout-commit-pos-order-am@35.8.4 executes a dropper on module load. Its main entry index.js requires _shim.js, which selects a platform-specific asset path and downloads an opaque native binary over HTTPS from hardcoded oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, and oob-worker.cf103-070.workers.dev hosts, with a DNS TXT-record fallback that reassembles base64 chunks from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Destination hostnames and the child_process require are built at runtime by joining fragmented substrings to evade static scanners. The downloaded bytes are written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows (disguised filenames), chmod 0755, and spawned detached via /bin/sh -c "<path> &" or cmd.exe /c start /b. A parallel dropper with the same download-chmod-spawn shape is bundled as lib/telemetry.js (~81KB) under an analytics-SDK cover story and is not currently wired from the entry points but ships in the tarball.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.8.4"
            ],
            "id": "IN-MAL-2026-015219",
            "import_time": "2026-08-05T14:20:13.96164967Z",
            "modified_time": "2026-08-05T14:14:04Z",
            "source": "amazon-inspector",
            "sha256": "732c6bcc33ca109e02cca656cb0f2324504d3bc3176cff55420b4705990a62e8"
        }
    ]
}
References
Credits

Affected packages

npm / checkout-commit-pos-order-am

Package

Name
checkout-commit-pos-order-am
View open source insights on deps.dev
Purl
pkg:npm/checkout-commit-pos-order-am

Affected ranges

Affected versions

35.*
35.8.4

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "checkout-commit-pos-order-am-35.8.4.tgz",
            "hashes": {
                "sha512_sri": "sha512-f+tkc5yhfcQqZ0+f5MHVZldpve55N9RFDdzqYj3Firv5fwV2IsUM/MsSbgWhL9lA8g1tm9tnmDO2XdsaMfKUGQ==",
                "sha1": "2420a741d1b6f598de1062267e66e7d303e9db9e"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_shim.js",
            "tlsh": "58a1946a16a6711887b0dbe4c6175416f65af2633780c2d8f79c69881ff212483b2efc",
            "sha256": "8936b119216cd834baf02997a34a8d9b2b6116a8e842be81f948844648ae444b"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "da835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "18c7563d79afa40840a62eb5fbe51b88dc499cc73902c7026b04e8ae946dc787"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-commit-pos-order-am/MAL-2026-12548.json"