mal-2026-13638
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51)
On require() of the package, shim.js executes a bootstrap() at module top level that fetches a platform-specific native binary from string-concatenation-obfuscated hosts under oob-worker.cf10{0,1,2}-.workers.dev, with a base64 DNS-TXT fallback under .dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache (POSIX) or %TEMP%\dotnet_diag_.exe (Windows), chmod'd 0755, and detached-spawned via /bin/sh -c or cmd /c start /b. The exported main lib/telemetry.js contains a duplicate download-decode-chmod-exec chain (Buffer.from(chunks,'base64'), fs'chmod'+'Sync', cp.spawn('/bin/sh',['-c', filePath + ' &'],{detached:true})) presented under an SDK/telemetry cover story. Destination hostnames and dangerous identifiers (require('child_'+'process'), fs['chmod'+'Sync']) are constructed via array-join and string concatenation to defeat static analysis. Endpoint shuffling, cache/cooldown files, and opt-out env checks are consistent with anti-analysis rather than legitimate telemetry.
- 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": "_shim.js",
"sha256": "12b446d122da53533f67de0b0cb18dc7e3e778fa74b1328e7c9b7b31886d6e42",
"tlsh": "82a1a62a16fa30180792e5d5891f6416719af58333c4e5c4fb4c76985fe622883f39ec"
},
{
"path": "lib/telemetry.js",
"sha256": "150c75790bf0b1febfd45a8ed06d177a5d8ebc8451a161294b9534d1fe4d079e",
"tlsh": "0f733f4966fb10214263b0685ebb40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
}
],
"package_integrity": [
{
"filename": "sme-rko-finance-front-operations-holding-domain-35.8.1.tgz",
"hashes": {
"sha1": "eb6e21debbd8a47768ba7c1819547c6cf7aa1c36",
"sha512_sri": "sha512-mUiuGfLu0jvyimwY1dQgsaj25BVy0uK6/iOJHAUpSmbVJAwm8Dknbuuc0Ekqp4l2JM+SiARwgmNCkder89aLGg=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "sme-rko-finance-front-operations-holding-domain"
},
"versions": [
"35.8.1"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-017154",
"import_time": "2026-08-08T00:53:07.355884346Z",
"modified_time": "2026-08-08T00:45:40Z",
"sha256": "f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51",
"source": "amazon-inspector",
"versions": [
"35.8.1"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51)\nOn require() of the package, _shim.js executes a bootstrap() at module top level that fetches a platform-specific native binary from string-concatenation-obfuscated hosts under oob-worker.cf10{0,1,2}-*.workers.dev, with a base64 DNS-TXT fallback under *.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache_\u003crand\u003e (POSIX) or %TEMP%\\dotnet_diag_\u003crand\u003e.exe (Windows), chmod\u0027d 0755, and detached-spawned via /bin/sh -c or cmd /c start /b. The exported main lib/telemetry.js contains a duplicate download-decode-chmod-exec chain (Buffer.from(chunks,\u0027base64\u0027), fs[\u0027chmod\u0027+\u0027Sync\u0027](...,0o755), cp.spawn(\u0027/bin/sh\u0027,[\u0027-c\u0027, filePath + \u0027 \u0026\u0027],{detached:true})) presented under an SDK/telemetry cover story. Destination hostnames and dangerous identifiers (require(\u0027child_\u0027+\u0027process\u0027), fs[\u0027chmod\u0027+\u0027Sync\u0027]) are constructed via array-join and string concatenation to defeat static analysis. Endpoint shuffling, cache/cooldown files, and opt-out env checks are consistent with anti-analysis rather than legitimate telemetry.\n",
"id": "MAL-2026-13638",
"modified": "2026-08-08T00:45:40Z",
"published": "2026-08-08T00:45:40Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/sme-rko-finance-front-operations-holding-domain/v/35.8.1"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in sme-rko-finance-front-operations-holding-domain (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.