MAL-2026-17766
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (1a1dd63de3f5e380c573cd6bcf885c9d0c7a5c503959dfde1a6c8b963a6ddaea)
On npm install, postinstall.js collects installer host identity — os.hostname(), os.userInfo().username, home directory, cwd, non-internal network interface addresses, DNS servers, and platform/arch/release — and POSTs it as JSON over HTTPS to the hardcoded endpoint https://collector.oob.s4yhii.com/_npm-poc/beacon, with a secondary DNS lookup against *.oob.s4yhii.com as an out-of-band execution signal. The package's scope (@s4yhiitestpoc/*) and metadata self-describe this as a dependency-confusion proof-of-concept targeting internal namespaces that resolve to the public registry; the self-labeling does not change the fact that installer host identifiers leave the installer's machine on install to a hardcoded third-party domain the installer did not opt into.
- 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": "postinstall.js",
"sha256": "f23aca67400de96abcfaa7a7c0ef987ebe14cef43467110595c8abc4a51f532d",
"tlsh": "fa51a75512b0237137f12ad0a84e54f5d322c3a6795979e4b18d02846bcb4fa42b62fb"
}
],
"package_integrity": [
{
"filename": "scan-https-d-1.0.0.tgz",
"hashes": {
"sha1": "f50c0ae29c524e0f135059f4c3779ed2906c2dd1",
"sha512_sri": "sha512-1xxUqIEv1UbxyZhi/GGYOFDfw1ezF4Ny8LGm/Vas2bWUU97X+dl/PrgOkV7zsbSazyk69DzGPuDw6lhN10jzbw=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "@s4yhiitestpoc/scan-https-d"
},
"versions": [
"1.0.0"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-021434",
"import_time": "2026-10-11T14:18:05.348764552Z",
"modified_time": "2026-10-11T13:58:59Z",
"sha256": "1a1dd63de3f5e380c573cd6bcf885c9d0c7a5c503959dfde1a6c8b963a6ddaea",
"source": "amazon-inspector",
"versions": [
"1.0.0"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1a1dd63de3f5e380c573cd6bcf885c9d0c7a5c503959dfde1a6c8b963a6ddaea)\nOn `npm install`, postinstall.js collects installer host identity \u2014 os.hostname(), os.userInfo().username, home directory, cwd, non-internal network interface addresses, DNS servers, and platform/arch/release \u2014 and POSTs it as JSON over HTTPS to the hardcoded endpoint https://collector.oob.s4yhii.com/_npm-poc/beacon, with a secondary DNS lookup against *.oob.s4yhii.com as an out-of-band execution signal. The package\u0027s scope (`@s4yhiitestpoc/*`) and metadata self-describe this as a dependency-confusion proof-of-concept targeting internal namespaces that resolve to the public registry; the self-labeling does not change the fact that installer host identifiers leave the installer\u0027s machine on install to a hardcoded third-party domain the installer did not opt into.\n",
"id": "MAL-2026-17766",
"modified": "2026-10-11T13:58:59Z",
"published": "2026-10-11T13:58:59Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/@s4yhiitestpoc/scan-https-d/v/1.0.0"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in @s4yhiitestpoc/scan-https-d (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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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