MAL-2026-13547
Vulnerability from ossf_malicious_packages
-= Per source details. Do not edit below this line.=-
Source: amazon-inspector (995f8b1091ff43f5fae824ef6ac028895003b9a24960b78449cbc7b295aa34fd)
On require of the package, index.js loads support.js which downloads a platform-specific binary from string-split-obfuscated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS TXT fallback that reassembles a base64 payload from numbered subdomains under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched binary is written to /var/tmp on Unix or %TEMP% on Windows under a disguised name (.cache or dotnet_diag_.exe), chmodded 0o755, and spawned detached via /bin/sh -c or cmd.exe /c start. Host strings and API names are reconstructed at runtime from array-join fragments (e.g., ["oob-worker.cf103-070.work","ers.d","ev"].join("")) to evade static analysis. A second module lib/telemetry.js ships the same dropper primitives with require("child_" + "process") and fs["chmod"+"Sync"] indirection, bundled as a ready-to-wire payload alongside the active dropper.
- 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": "_support.js",
"sha256": "33a2beb5d94d15afefa2ea1fc4d00bf07288bea6d291312e5c38ec0c0daa3380",
"tlsh": "b1a1946a05aa70184b70dbf4c617541af65af66373808698fb9c95c81ff251483b2efc"
},
{
"path": "lib/telemetry.js",
"sha256": "5e726c0075e2275d041c15f67d8c990ab7626b8f973117e9c9b142ed67d373d0",
"tlsh": "f9835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
}
],
"package_integrity": [
{
"filename": "devplatform-spa-plugin-remote-module-35.9.6.tgz",
"hashes": {
"sha1": "968ec53267229b1f5d8acb644717c3d2068e379a",
"sha512_sri": "sha512-sNY7df4BAyYCiNOFHpcXOx/8KLGer4Hmm+UvuwpsCkbtPzBWR9sSoVKPErtF2p65+TAOzRaCJzDSQgx5LIRI0w=="
}
}
]
}
},
"package": {
"ecosystem": "npm",
"name": "devplatform-spa-plugin-remote-module"
},
"versions": [
"35.9.6"
]
}
],
"credits": [
{
"contact": [
"inspector-research@amazon.com"
],
"name": "Amazon Inspector",
"type": "FINDER"
}
],
"database_specific": {
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-017047",
"import_time": "2026-08-07T12:51:23.777780628Z",
"modified_time": "2026-08-07T12:36:14Z",
"sha256": "995f8b1091ff43f5fae824ef6ac028895003b9a24960b78449cbc7b295aa34fd",
"source": "amazon-inspector",
"versions": [
"35.9.6"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (995f8b1091ff43f5fae824ef6ac028895003b9a24960b78449cbc7b295aa34fd)\nOn require of the package, index.js loads _support.js which downloads a platform-specific binary from string-split-obfuscated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS TXT fallback that reassembles a base64 payload from numbered subdomains under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched binary is written to /var/tmp on Unix or %TEMP% on Windows under a disguised name (.cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe), chmodded 0o755, and spawned detached via /bin/sh -c or cmd.exe /c start. Host strings and API names are reconstructed at runtime from array-join fragments (e.g., [\"oob-worker.cf103-070.work\",\"ers.d\",\"ev\"].join(\"\")) to evade static analysis. A second module lib/telemetry.js ships the same dropper primitives with require(\"child_\" + \"process\") and fs[\"chmod\"+\"Sync\"] indirection, bundled as a ready-to-wire payload alongside the active dropper.\n",
"id": "MAL-2026-13547",
"modified": "2026-08-07T12:36:14Z",
"published": "2026-08-07T12:36:14Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/devplatform-spa-plugin-remote-module/v/35.9.6"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in devplatform-spa-plugin-remote-module (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.