mal-2026-12299
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (74e5494883e9415a6efbc2775e753d413e111f02709b95688c94e09013dc8db8)
On require() of this package, index.js loads adapter.js which selects a platform-specific asset path (/pkg/package, /pkg/package.exe, /pkg/loader_mac, /pkg/package-arm64) and fetches an opaque native executable over HTTPS from hostnames reconstructed at runtime via array-join fragments (oob-worker.cf-.workers.dev), with a DNS TXT chunked-base64 fallback under *.dl.well1.site. The downloaded bytes are written to /var/tmp/.cache or %TEMP%/dotnet_diag_.exe, chmod'd 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are assembled from split string fragments to evade static grepping. A second unreferenced dropper implementation in lib/telemetry.js (self-described 'Analytics SDK', 81KB) mirrors the same primitives at larger scale (cp.spawn('/bin/sh', ['-c', filePath+' &'], {detached:true}), fs['chmod'+'Sync'], base64 chunk decoding). The fetched payload host is unrelated to any stated package purpose, is mutable and anonymously-hosted, and delivers arbitrary native code that runs with the installer's privileges on every require.
Source: ghsa-malware (21c5f74da53fef9d14daea5a21e6d8a55c8ea50c94a400ee5885660e0952e61b)
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
{
"affected": [
{
"database_specific": {
"cwes": [
{
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature.",
"name": "Embedded Malicious Code"
},
{
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature.",
"name": "Embedded Malicious Code"
}
],
"indicators": {
"evidence_files": [
{
"path": "_adapter.js",
"sha256": "59a5d0891eb63d7dba6d9fc3473eb76e35c95178881290f932e32f23f76735ab",
"tlsh": "81b1956a136630198bb0dbe4cb175415f65af5a333808294fb5c69985fb613883b2efc"
},
{
"path": "lib/telemetry.js",
"sha256": "77e586309f27635196cf87e75126d81b9133b1bc33cca33958eaa68b8e1fba82",
"tlsh": "21835055566a242186b2b368df234007ff3685272643429dbafc82dc1fbd72092a5ffc"
}
],
"package_integrity": [
{
"filename": "twork-data-services-proxy-prime-api-v1-account-overdraft-info-20.7.4.tgz",
"hashes": {
"sha1": "93894c3b4d46372f965a8d5a48a726935b5fdd2a",
"sha512_sri": "sha512-NzCv6MiqqECUqBX3Xq+ObRB9N1nw4cSU8prcMJ3gvovlcgjc6qo4xjHc6L3foZJVsRTDgjzMEYBGMLwkuT6wFw=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "twork-data-services-proxy-prime-api-v1-account-overdraft-info"
},
"versions": [
"20.7.4"
]
}
],
"aliases": [
"GHSA-crw8-m6mj-q6qp"
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-014608",
"import_time": "2026-08-05T09:28:30.047695124Z",
"modified_time": "2026-08-05T09:15:05Z",
"sha256": "74e5494883e9415a6efbc2775e753d413e111f02709b95688c94e09013dc8db8",
"source": "amazon-inspector",
"versions": [
"20.7.4"
]
},
{
"id": "GHSA-crw8-m6mj-q6qp",
"import_time": "2026-08-25T17:25:28.254063806Z",
"modified_time": "2026-08-25T16:38:22Z",
"sha256": "21c5f74da53fef9d14daea5a21e6d8a55c8ea50c94a400ee5885660e0952e61b",
"source": "ghsa-malware",
"versions": [
"20.7.4"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (74e5494883e9415a6efbc2775e753d413e111f02709b95688c94e09013dc8db8)\nOn require() of this package, index.js loads _adapter.js which selects a platform-specific asset path (/pkg/package, /pkg/package.exe, /pkg/loader_mac, /pkg/package-arm64) and fetches an opaque native executable over HTTPS from hostnames reconstructed at runtime via array-join fragments (oob-worker.cf*-*.workers.dev), with a DNS TXT chunked-base64 fallback under *.dl.well1.site. The downloaded bytes are written to /var/tmp/.cache_\u003crand\u003e or %TEMP%/dotnet_diag_\u003crand\u003e.exe, chmod\u0027d 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are assembled from split string fragments to evade static grepping. A second unreferenced dropper implementation in lib/telemetry.js (self-described \u0027Analytics SDK\u0027, 81KB) mirrors the same primitives at larger scale (cp.spawn(\u0027/bin/sh\u0027, [\u0027-c\u0027, filePath+\u0027 \u0026\u0027], {detached:true}), fs[\u0027chmod\u0027+\u0027Sync\u0027], base64 chunk decoding). The fetched payload host is unrelated to any stated package purpose, is mutable and anonymously-hosted, and delivers arbitrary native code that runs with the installer\u0027s privileges on every require.\n\n## Source: ghsa-malware (21c5f74da53fef9d14daea5a21e6d8a55c8ea50c94a400ee5885660e0952e61b)\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n",
"id": "MAL-2026-12299",
"modified": "2026-08-25T17:27:31.885104630Z",
"published": "2026-08-05T09:15:05Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/twork-data-services-proxy-prime-api-v1-account-overdraft-info/v/20.7.4"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-crw8-m6mj-q6qp"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in twork-data-services-proxy-prime-api-v1-account-overdraft-info (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.