MAL-2026-12244

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-mutual-mgm-form/MAL-2026-12244.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12244
Published
2026-08-05T09:01:38Z
Modified
2026-08-05T10:06:41.906448462Z
Summary
Malicious code in tinkoff-mutual-mgm-form (npm)
Details

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

Source: amazon-inspector (84bc64dc52d6f64a0673f548b3201cc6eed96ea71665ccd1fc1a41b29ac12cca)

On require('tinkoff-mutual-mgm-form'), index.js loads compat.js, which selects a platform-specific asset path and fetches a native binary over HTTPS from Cloudflare Workers subdomains assembled via array.join('') string concatenation (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT chunked fallback to look-alike hosts under dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site). The fetched bytes are written to a masquerading path in /var/tmp or %TEMP% (e.g., dotnetdiag<rnd>.exe or.cache<rnd>), chmodded to 0755, and spawned detached via /bin/sh -c '<path> &' or cmd.exe start /b. The require('child_process') module name is also split-string obfuscated, and cover-story comments frame the behavior as 'telemetry' and 'session tracking'. A second copy of the same fetch-write-chmod-spawn dropper is bundled in lib/telemetry.js as an 'Analytics SDK', staged as an alternate payload. Destinations, obfuscation, masquerading filenames, and detached execution are inconsistent with the package's declared purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T09:01:38Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-014513",
            "import_time": "2026-08-05T09:28:20.980876828Z",
            "sha256": "84bc64dc52d6f64a0673f548b3201cc6eed96ea71665ccd1fc1a41b29ac12cca",
            "versions": [
                "20.2.9"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-mutual-mgm-form

Package

Name
tinkoff-mutual-mgm-form
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-mutual-mgm-form

Affected ranges

Affected versions

20.*
20.2.9

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "tinkoff-mutual-mgm-form-20.2.9.tgz",
            "hashes": {
                "sha512_sri": "sha512-fPfGT4Tns2FbfF1esoeL7eF8DfJjiYr3l9/bqwneRjdIxeOu/wjLMtbpcRptmml5zEHARlRGDjzmGVMKvjm9vA==",
                "sha1": "26b5ab1495f1e63635e20d79b843cc100294bf15"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "1fb1a76a126570194b70dbe4c7175419f66af26333408594f75ca9d81fb221483b3efc",
            "sha256": "1ab4510c8f3a11c26031a5c0d51554f93d9c240519a0c33c786a4f0bb8031e2a",
            "path": "_compat.js"
        },
        {
            "tlsh": "66835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "b516b8bf2148ad6ceb4e8a3ffb8b601768db22a34269a9b672192c1414bb9222",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-mutual-mgm-form/MAL-2026-12244.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]