MAL-2026-13543

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-v1-resources/MAL-2026-13543.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13543
Published
2026-08-07T12:28:10Z
Modified
2026-08-07T13:20:24.143775219Z
Summary
Malicious code in devplatform-api-v1-resources (npm)
Details

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

Source: amazon-inspector (58312f0f83e88c3dbd6f62bc334db255d0e3d5c6aed0d8d859dd0b17ce77557c)

On require of the package's main entry, setup.js fetches a platform-specific binary from Cloudflare Workers hosts whose names are reassembled at runtime from fragment arrays (e.g. oob-worker.cf101-*.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT fallback under *.dl.wel1.ru. The fetched bytes are written to /var/tmp or the Windows TEMP directory under disguised names (dotnetdiag<hex>.exe,.cache_<hex>), chmod'd to 0755, and spawned detached via /bin/sh on POSIX or cmd on Windows. No hash or signature verification is performed. A second copy of the same download-write-chmod-spawn pattern, using base64 chunk assembly and string-concatenated API names (fs["chmod"+"Sync"]), is shipped in lib/telemetry.js under the guise of a telemetry SDK. C2 hostnames are split into small fragments and joined at runtime to defeat static analysis, and endpoints rotate across multiple workers.dev subdomains with a.ru DNS fallback.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-07T12:28:10Z",
            "id": "IN-MAL-2026-016993",
            "import_time": "2026-08-07T12:51:21.338311766Z",
            "versions": [
                "35.4.7"
            ],
            "source": "amazon-inspector",
            "sha256": "58312f0f83e88c3dbd6f62bc334db255d0e3d5c6aed0d8d859dd0b17ce77557c"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-api-v1-resources

Package

Name
devplatform-api-v1-resources
View open source insights on deps.dev
Purl
pkg:npm/devplatform-api-v1-resources

Affected ranges

Affected versions

35.*
35.4.7

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": "devplatform-api-v1-resources-35.4.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-ZPzAGoLsGupG4PHJvf2aOLBy/+Gp1H4Efv90ZVF1Q3mJeGMV29Wx0ayeukgksbMJFVjmjfbZ/yi782qn4HiAUA==",
                "sha1": "af13c351582ca207fa9540e812e3f0a6743098cc"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "setup.js",
            "tlsh": "46a1ba961666701c8bb09bf4871b5416f65be6633780c288fb5ca4981f721248372efc",
            "sha256": "320a3f97cccce3f6ea76ad2c4f82a50ee514c121d89c10bd3227477894c5d68e"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "20835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "0f0059fea6a711a0da69c94567438bf114d59565e373c83a3daa80088fd36c12"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-v1-resources/MAL-2026-13543.json"