MAL-2026-12720

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-markdown/MAL-2026-12720.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12720
Published
2026-08-05T13:50:29Z
Modified
2026-08-05T14:36:41Z
Summary
Malicious code in devplatform-markdown (npm)
Details

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

Source: amazon-inspector (9eab2b5f60c30ade507d29f76ffef745c0c12719aefb9f289d57f335288aeac4)

devplatform-markdown@35.9.6 advertises itself as a markdown provider but on require of index.js loads adapter.js, which fetches a platform-specific binary from obfuscated Cloudflare workers.dev hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback under *.dl.wel1.ru. Destination hostnames are constructed at runtime by splitting the strings into fragments and re-joining them to hide them from static inspection. The downloaded bytes are written under disguised names (e.g..cache, dotnet_diag_.exe) in /var/tmp or the Windows Temp directory, chmod 0755, and spawned detached via /bin/sh -c or cmd /c start. A local marker file named.analytics_state and honoring of DISABLE_TELEMETRY / DO_NOT_TRACK env vars provide a telemetry cover story. Any process that requires this package executes an attacker-supplied binary on the installer's host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015061",
            "import_time": "2026-08-05T14:19:57.843022292Z",
            "modified_time": "2026-08-05T13:50:29Z",
            "sha256": "9eab2b5f60c30ade507d29f76ffef745c0c12719aefb9f289d57f335288aeac4",
            "source": "amazon-inspector",
            "versions": [
                "35.9.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-markdown

Package

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

Affected ranges

Affected versions

35.*
35.9.6

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": "_adapter.js",
            "sha256": "8302819626f7c7f339a08d02af30cb2a962826f8579d6cf593841f2d4d03de4e",
            "tlsh": "bca1969a156a70198bb09be48717541af65bf6633380c2c4fb6c58841f7716483b2dfc"
        }
    ],
    "package_integrity": [
        {
            "filename": "devplatform-markdown-35.9.6.tgz",
            "hashes": {
                "sha1": "37d9673eab25cdae30a282c0cdae5ba93f11f57d",
                "sha512_sri": "sha512-gW3+9t2v01cfLj9kQIrT3zXoeqO3E0YmcZCxpjNaQ0Fy/mJrdn3+ad5o7xqerkcX4/gSxbEoj4wshhbRbHKqkg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-markdown/MAL-2026-12720.json"