MAL-2026-12289

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/twork-data-services-counterfree/MAL-2026-12289.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12289
Published
2026-08-05T09:15:13Z
Modified
2026-08-05T10:07:02.260078575Z
Summary
Malicious code in twork-data-services-counterfree (npm)
Details

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

Source: amazon-inspector (d2736d9321d2c88c7c2ba7202eefb1c7d0f24106f97480043483ee47ca7d19f9)

index.js unconditionally requires./init on load. init.js selects a platform-specific binary path, fetches an opaque payload over HTTPS from attacker-controlled Cloudflare Workers hosts whose hostnames are assembled at runtime by joining short string fragments (e.g. 'oob-worker.cf102' + '-baf.work' + 'ers.' + 'dev' → oob-worker.cf102-baf.workers.dev; sibling hosts oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). If HTTPS mirrors are unreachable, the loader falls back to a DNS-TXT covert channel: it resolves TXT on c.<domain> under *.dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site) to obtain a chunk count, resolves numbered subdomains to collect base64 chunks, and reassembles the payload. The bytes are written to /tmp or %TEMP% under deceptive names masquerading as system tooling (dotnetdiag<rnd>.exe on Windows,.cache<rnd> /.analyticsstate on POSIX), chmod 0o755 is applied on POSIX, and the binary is spawned detached via cp.spawn('/bin/sh', ['-c', fp+' &'], {detached:true}).unref() or the Windows cmd equivalent. Fires on require() of the package, so any consumer that installs and loads twork-data-services-counterfree executes attacker-controlled code with the installer's privileges.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "20.1.3"
            ],
            "import_time": "2026-08-05T09:28:30.238253944Z",
            "sha256": "d2736d9321d2c88c7c2ba7202eefb1c7d0f24106f97480043483ee47ca7d19f9",
            "modified_time": "2026-08-05T09:15:13Z",
            "id": "IN-MAL-2026-014609",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / twork-data-services-counterfree

Package

Name
twork-data-services-counterfree
View open source insights on deps.dev
Purl
pkg:npm/twork-data-services-counterfree

Affected ranges

Affected versions

20.*
20.1.3

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-hgl2DYi+OPkX0VSlKnKet9iK7K7DLOdmnPXKHwsm08IfdhPSOReoJomf56dASvNd+RPbn7ccueS1lpG6XpSStg==",
                "sha1": "7e20fdef9fb6c2c99b313961d7432d828b5f8ca0"
            },
            "filename": "twork-data-services-counterfree-20.1.3.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_init.js",
            "sha256": "f6dfcb35519ccbe0723eb7363b2361bf88ed745cb274ee99655ac1af4a790b16",
            "tlsh": "33a1a69a156a711847b0a7e4c7174415f65bf6633380c294f79ca5980fb312482b2ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/twork-data-services-counterfree/MAL-2026-12289.json"