mal-2026-1225
Vulnerability from ossf_malicious_packages
Published
2026-03-03 17:51
Modified
2026-03-03 20:14
Summary
Malicious code in urllib-slim (PyPI)
Details
-= Per source details. Do not edit below this line.=-
Source: kam193 (ab38fb394a17f30f0503cdeb9f982f99aaec2c5f43496b6e5d7ccd505d926915)
During installation, the package starts obfuscated code that downloads and runs remote executables in specific environments - in older packages - attempts to exfiltrate some basic information using DNS requests and then likely cover tracks by installing a similarly named package from private repository
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-02-urllib-slim
Reasons (based on the campaign):
-
typosquatting
-
Downloads and executes a remote executable.
-
obfuscation
-
dependency-confusion
Credits
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "urllib-slim"
},
"versions": [
"9.31",
"9.32",
"9.33",
"9.34",
"9.35",
"9.36"
]
}
],
"credits": [
{
"contact": [
"https://github.com/kam193",
"https://bad-packages.kam193.eu/"
],
"name": "Kamil Ma\u0144kowski (kam193)",
"type": "REPORTER"
}
],
"database_specific": {
"iocs": {
"domains": [
"1r.vc",
"i.1r.vc"
],
"urls": [
"https://storage.googleapis.com/py-pi/python_mac",
"https://storage.googleapis.com/py-pi/python_rhel",
"https://storage.googleapis.com/py-pi/python_win"
]
},
"malicious-packages-origins": [
{
"id": "pypi/2026-02-urllib-slim/urllib-slim",
"import_time": "2026-03-03T18:20:16.086769969Z",
"modified_time": "2026-03-03T17:52:53.800886Z",
"sha256": "ab38fb394a17f30f0503cdeb9f982f99aaec2c5f43496b6e5d7ccd505d926915",
"source": "kam193",
"versions": [
"9.31",
"9.32",
"9.33",
"9.34",
"9.35"
]
},
{
"id": "pypi/2026-02-urllib-slim/urllib-slim",
"import_time": "2026-03-03T19:20:04.717631436Z",
"modified_time": "2026-03-03T18:32:08.971007Z",
"sha256": "af9dfb22d0369590148408b736b7cdc45bf01c59f22fe6ee498809384081c452",
"source": "kam193",
"versions": [
"9.31",
"9.32",
"9.33",
"9.34",
"9.35",
"9.36"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (ab38fb394a17f30f0503cdeb9f982f99aaec2c5f43496b6e5d7ccd505d926915)\nDuring installation, the package starts obfuscated code that downloads and runs remote executables in specific environments - in older packages - attempts to exfiltrate some basic information using DNS requests and then likely cover tracks by installing a similarly named package from private repository\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-02-urllib-slim\n\n\nReasons (based on the campaign):\n\n\n - typosquatting\n\n\n - Downloads and executes a remote executable.\n\n\n - obfuscation\n\n\n - dependency-confusion\n",
"id": "MAL-2026-1225",
"modified": "2026-03-03T20:14:02Z",
"published": "2026-03-03T17:51:17Z",
"references": [
{
"type": "WEB",
"url": "https://bad-packages.kam193.eu/pypi/package/urllib-slim"
},
{
"type": "EVIDENCE",
"url": "https://www.virustotal.com/gui/file/d6029cce705b3842042106efb737c8b14eb736fdbfb8d0d03c3dfbc8d6c207a5?nocache=1"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in urllib-slim (PyPI)"
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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