MAL-2026-13557
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (ff93de8eda70052b857d953b6087515b34e3ae34d7269e410f6e07b181977d97)
The package presents itself as a UI checkable-group helper but on require executes a dropper. _helpers.js and the main-exported lib/telemetry.js assemble destination hostnames at runtime from split-string arrays (e.g. ["oob-worker.cf1","00-416.work","er","s.dev"].join("") yielding oob-worker.cf100-416.workers.dev, plus cf101-adf and cf103-070 siblings), select a platform-specific endpoint, download an opaque binary via https.get, write it to /tmp or %TEMP% under a spoofed name mimicking a Microsoft diagnostic tool (dotnet_diag_<hex>.exe, .cache_<hex>), chmodSync 0755, and spawn it detached via cp.spawn("/bin/sh",["-c", filePath+" &"], {detached:true}) on Unix or cmd.exe /c start /b on Windows. A covert DNS-TXT fallback channel under *.dl.wel1.ru reassembles a base64 payload from numbered subdomains (c.<domain> for count, <i>.<domain> for chunks). No hash or signature verification is performed. The dropper is duplicated across _helpers.js and the main-exported lib/telemetry.js, ensuring execution on any require of the package. Hostname obfuscation via split-string concatenation, spoofed on-disk names, detached execution, and the DNS-TXT covert channel are consistent with purpose-built malware distributed as a UI-helper lure.
- CWE-506 - The product contains code that appears to be malicious in nature.
{
"affected": [
{
"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": "_helpers.js",
"sha256": "d051af3a58cb08db09b2e4a0a4f9530a205200a592e973be01cb523031d3d6d9",
"tlsh": "44a1735916fa70180792e0d8852fa416719ef59372c4d8d4fb8c6a984fe7228c3b39fc"
},
{
"path": "lib/telemetry.js",
"sha256": "730f8b1bcba564ecdedd133600e3e0cb509cd9bb30ed582fb002e9dd634996bf",
"tlsh": "8e73304966fb10214263b0685ebb40437635c4072a4aed5dba9c43ec9f8db3896f1fb9"
}
],
"package_integrity": [
{
"filename": "dolyame-ui-checkablegroup-35.8.1.tgz",
"hashes": {
"sha1": "385c475a176cba1f2697aebe9a1794f48b4fc114",
"sha512_sri": "sha512-sO+XVDKhmxaRwD0dEjsN9zRcjAOFUSqPnqZILmemiIvyFzDqJDKFQ+Iv7gNl7686l4RhUqV81kL86eASdBNFQg=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "dolyame-ui-checkablegroup"
},
"versions": [
"35.8.1"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-017046",
"import_time": "2026-08-07T12:51:23.739124106Z",
"modified_time": "2026-08-07T12:36:06Z",
"sha256": "ff93de8eda70052b857d953b6087515b34e3ae34d7269e410f6e07b181977d97",
"source": "amazon-inspector",
"versions": [
"35.8.1"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (ff93de8eda70052b857d953b6087515b34e3ae34d7269e410f6e07b181977d97)\nThe package presents itself as a UI checkable-group helper but on require executes a dropper. `_helpers.js` and the main-exported `lib/telemetry.js` assemble destination hostnames at runtime from split-string arrays (e.g. `[\"oob-worker.cf1\",\"00-416.work\",\"er\",\"s.dev\"].join(\"\")` yielding `oob-worker.cf100-416.workers.dev`, plus `cf101-adf` and `cf103-070` siblings), select a platform-specific endpoint, download an opaque binary via `https.get`, write it to `/tmp` or `%TEMP%` under a spoofed name mimicking a Microsoft diagnostic tool (`dotnet_diag_\u003chex\u003e.exe`, `.cache_\u003chex\u003e`), `chmodSync` 0755, and spawn it detached via `cp.spawn(\"/bin/sh\",[\"-c\", filePath+\" \u0026\"], {detached:true})` on Unix or `cmd.exe /c start /b` on Windows. A covert DNS-TXT fallback channel under `*.dl.wel1.ru` reassembles a base64 payload from numbered subdomains (`c.\u003cdomain\u003e` for count, `\u003ci\u003e.\u003cdomain\u003e` for chunks). No hash or signature verification is performed. The dropper is duplicated across `_helpers.js` and the main-exported `lib/telemetry.js`, ensuring execution on any `require` of the package. Hostname obfuscation via split-string concatenation, spoofed on-disk names, detached execution, and the DNS-TXT covert channel are consistent with purpose-built malware distributed as a UI-helper lure.\n",
"id": "MAL-2026-13557",
"modified": "2026-08-07T12:36:06Z",
"published": "2026-08-07T12:36:06Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/dolyame-ui-checkablegroup/v/35.8.1"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in dolyame-ui-checkablegroup (npm)"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.