MAL-2026-12684

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-unit/MAL-2026-12684.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12684
Published
2026-08-05T13:55:26Z
Modified
2026-08-05T14:36:24.135808265Z
Summary
Malicious code in delivery-ci-unit (npm)
Details

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

Source: amazon-inspector (69ab1e8e2553a7469b1ce9a50549b0f1cb964160096693715d10643a853eade4)

On require of the package, index.js loads loader.js, which reconstructs attacker-controlled hostnames from split-string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, plus DNS TXT chunked-base64 fallbacks at sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), fetches a platform-specific binary over HTTPS, writes it to /tmp/.cache<hex> on Unix or TEMP\dotnetdiag<hex>.exe on Windows, chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. No signature or hash verification is performed; filenames masquerade as system caches; a TTL marker rate-limits execution; environment-variable checks are used as evasion; and a DNS TXT covert channel serves as a fallback delivery path. The fetch host is reconstructed at runtime with no legitimate purpose, and the destinations are not the package's publisher.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T13:55:26Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015094",
            "import_time": "2026-08-05T14:20:01.321279048Z",
            "sha256": "69ab1e8e2553a7469b1ce9a50549b0f1cb964160096693715d10643a853eade4",
            "versions": [
                "35.9.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-unit

Package

Name
delivery-ci-unit
View open source insights on deps.dev
Purl
pkg:npm/delivery-ci-unit

Affected ranges

Affected versions

35.*
35.9.3

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "delivery-ci-unit-35.9.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-PpITXyz5uUgh72KVH1GwMWyDSaQgw+Hl6yZkR7CqPzzUmsB3mfZlAXf8RZq/76m2Jk/gcRk/DjcyzwP30BWMiQ==",
                "sha1": "685c61e3b5d9e03ae4e9d4dfe7f8d2d55b83da1d"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "69b1965a126630284bb09be4c71b4416f65ff6633380c294fb6ca9951f73124c2b2efd",
            "sha256": "15aa03b434cda85a1b998291f8cebd5a15e41e7f66703536cb29570b1acbd22d",
            "path": "_loader.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-unit/MAL-2026-12684.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]