MAL-2026-13336

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-boxy-markdown/MAL-2026-13336.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13336
Published
2026-08-05T15:21:15Z
Modified
2026-08-05T16:50:58Z
Summary
Malicious code in dolyame-boxy-markdown (npm)
Details

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

Source: amazon-inspector (373a9a2757b6b44dde0583e1cf35f5eabe8e360bf732e751630d8bb8ddb72ee6)

On require() of dolyame-boxy-markdown, index.js loads ext.js which downloads a platform-specific native binary from author-controlled Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT covert-channel fallback under *.dl.wel1.ru (sdk/ext/pkg/net subdomains). The fetched bytes are written to /var/tmp or %TEMP% under disguised names (dotnet_diag.exe,.cache_), chmod 0755, then spawned detached via cmd.exe /c start /b on Windows or /bin/sh -c ' &' on Unix. No hash or signature verification is performed. Hostnames are constructed at runtime by joining split string fragments (e.g. ['oob-w','orker.cf101-adf.w','orkers.de','v'].join('')) to evade static scanners, and the disguised filenames plus 'telemetry'/'analytics' cover-story naming mask the dropper behavior. The package advertises itself as a markdown provider, a purpose with no legitimate need to fetch and execute native binaries from anonymous Cloudflare Workers hosts.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-015665",
            "import_time":  "2026-08-05T16:13:29.82592601Z",
            "modified_time":  "2026-08-05T15:21:15Z",
            "sha256":  "373a9a2757b6b44dde0583e1cf35f5eabe8e360bf732e751630d8bb8ddb72ee6",
            "source":  "amazon-inspector",
            "versions":  [
                "35.9.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-boxy-markdown

Package

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

Affected ranges

Affected versions

35.*
35.9.4

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":  "_ext.js",
            "sha256":  "6349fd14c4120b8eada80758cd43bd0b2d86829ea8b5a03608a919295acce751",
            "tlsh":  "69a1755a127a70198bb0a7f4871b441af65bf6633380c294fb6c64985f7752483b2dfc"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "dolyame-boxy-markdown-35.9.4.tgz",
            "hashes":  {
                "sha1":  "4237e45a8e97d48b1949a020776090df4be03c43",
                "sha512_sri":  "sha512-qRkjI/yNpW2VMnIVX7msgcJfKlyVNVNLJncwgyAH7Gvp1FJcUJxw1UMcgUm22xyB4zcQgiWsEN3Qa/bfEP0Dvw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-boxy-markdown/MAL-2026-13336.json"