mal-2026-5100
Vulnerability from ossf_malicious_packages
Published
2026-05-31 13:13
Modified
2026-05-31 13:13
Summary
Malicious code in obfuscation (PyPI)
Details
-= Per source details. Do not edit below this line.=-
Source: kam193 (9a6d747918a89b433d6b670595d6b8d3049f49a69762c3e483d4f0f9dbeb81a3)
During installation, the code tamper with security settings and downloads and executes malicious executable.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-cryptolock
Reasons (based on the campaign):
-
The package overrides the install command in setup.py to execute malicious code during installation.
-
Downloads and executes a remote executable.
-
malware
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "obfuscation"
},
"versions": [
"3.23.0",
"3.23.2",
"3.23.3"
]
}
],
"credits": [
{
"contact": [
"https://github.com/kam193",
"https://bad-packages.kam193.eu/"
],
"name": "Kamil Ma\u0144kowski (kam193)",
"type": "REPORTER"
}
],
"database_specific": {
"iocs": {
"urls": [
"https://github.com/seIfrighteous/x/releases/download/selfrighteous/setup.exe",
"https://tmpfiles.org/dl/wVwFfznUQdRr/main.exe",
"https://github.com/seIfrighteous/x/releases/download/selfrighteous/NisSrv.exe",
"https://github.com/seIfrighteous/x/releases/download/selfrighteous/MpClient.dll"
]
},
"malicious-packages-origins": [
{
"id": "pypi/2026-05-cryptolock/obfuscation",
"import_time": "2026-05-31T14:36:54.229591627Z",
"modified_time": "2026-05-31T13:13:57.039494Z",
"sha256": "9a6d747918a89b433d6b670595d6b8d3049f49a69762c3e483d4f0f9dbeb81a3",
"source": "kam193",
"versions": [
"3.23.0",
"3.23.2",
"3.23.3"
]
}
]
},
"details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (9a6d747918a89b433d6b670595d6b8d3049f49a69762c3e483d4f0f9dbeb81a3)\nDuring installation, the code tamper with security settings and downloads and executes malicious executable.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-05-cryptolock\n\n\nReasons (based on the campaign):\n\n\n - The package overrides the install command in setup.py to execute malicious code during installation.\n\n\n - Downloads and executes a remote executable.\n\n\n - malware\n",
"id": "MAL-2026-5100",
"modified": "2026-05-31T13:13:57Z",
"published": "2026-05-31T13:13:56Z",
"references": [
{
"type": "EVIDENCE",
"url": "https://www.virustotal.com/gui/file/0912542c6e3a6b747a5bb30de22c1b79ead35c5a9a6813dcd8a6056cc312b892/detection"
},
{
"type": "WEB",
"url": "https://bad-packages.kam193.eu/pypi/package/obfuscation"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in obfuscation (PyPI)"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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