MAL-2026-5100

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/obfuscation/MAL-2026-5100.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5100
Published
2026-05-31T13:13:56Z
Modified
2026-05-31T14:45:53.084056244Z
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

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": [
        {
            "import_time": "2026-05-31T14:36:54.229591627Z",
            "versions": [
                "3.23.0",
                "3.23.2",
                "3.23.3"
            ],
            "source": "kam193",
            "id": "pypi/2026-05-cryptolock/obfuscation",
            "modified_time": "2026-05-31T13:13:57.039494Z",
            "sha256": "9a6d747918a89b433d6b670595d6b8d3049f49a69762c3e483d4f0f9dbeb81a3"
        }
    ]
}
References
Credits

Affected packages

PyPI / obfuscation

Package

Name
obfuscation
View open source insights on deps.dev
Purl
pkg:pypi/obfuscation

Affected ranges

Affected versions

3.*
3.23.0
3.23.2
3.23.3

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/obfuscation/MAL-2026-5100.json"