MAL-2026-12753

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-snarkdown/MAL-2026-12753.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12753
Published
2026-08-05T13:43:53Z
Modified
2026-08-05T14:36:55.636081772Z
Summary
Malicious code in devplatform-snarkdown (npm)
Details

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

Source: amazon-inspector (050140bdd00f1d32d6a6142067c28c92fe95ff1be979f4272c8966ba58c78b92)

On require of the package, shim.js selects a platform-specific URL, downloads a binary from hardcoded Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), and falls back to a DNS-TXT covert channel that reconstructs a base64 payload from chunked TXT records under wel1.ru subdomains (sdk/ext/pkg/net.dl.wel1.ru). The fetched bytes are written to a temp path under a masquerading name (e.g..cache* / dotnetdiag*.exe), chmodded 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Hostnames and resolver domains are assembled at runtime by joining string fragments to defeat static analysis. A timestamped lockfile at /tmp/.analyticsstate (or %TEMP%\analyticsstate) gates re-execution for ~21201 seconds, and DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK env vars cause early return — a sandbox/CI evasion posture wrapped in telemetry cover-story naming. The package advertises itself as a markdown parser; downloading and executing a native binary at require time is unrelated to that purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015017",
            "import_time": "2026-08-05T14:19:53.033631506Z",
            "sha256": "050140bdd00f1d32d6a6142067c28c92fe95ff1be979f4272c8966ba58c78b92",
            "modified_time": "2026-08-05T13:43:53Z",
            "versions": [
                "35.2.1"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-snarkdown

Package

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

Affected ranges

Affected versions

35.*
35.2.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-UDq3Ii1nOZ2Uqi2hy1+HnVmmgzz6HowcT9ep81gKvoRHteVrstMmzJAknwlRG3fHzYc5O6tWRXem5PkAbxtAgw==",
                "sha1": "a8418ccd50c8efc9aa6ce8d01acf10e8c004c2e6"
            },
            "filename": "devplatform-snarkdown-35.2.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "9ed29faade9c222addc6bc341112306e1e57e2880581099303567beb6d17c35d",
            "path": "_shim.js",
            "tlsh": "a8a1745a06a670084bb09be0cb175416f55bf6637380d294fb9ca5985fb352483b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-snarkdown/MAL-2026-12753.json"