MAL-2025-191833

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pydefender/MAL-2025-191833.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2025-191833
Published
2025-03-01T15:16:30Z
Modified
2025-12-12T20:41:55.633526Z
Summary
Malicious code in pydefender (PyPI)
Details

-= Per source details. Do not edit below this line.=-

Source: kam193 (a1e2cc2d94eff74e302118c35c34f87e76175fe507facbe21c29883960c8223e)

setup.py is prepared to download and run an obfuscated batch script. While the script is not detected by any AV currently, in the sandbox analysis it reveals behaviour like adding exclusions to Windows Defender

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-02-pydefender

Reasons (based on the campaign):

  • Downloads and executes a remote malicious script.

  • malware

  • The package overrides the install command in setup.py to execute malicious code during installation.

Database specific 
{
    "iocs": {
        "urls": [
            "https://raw.githubusercontent.com/baledreamer/payload/refs/heads/main/smegma.bat"
        ]
    },
    "malicious-packages-origins": [
        {
            "source": "kam193",
            "modified_time": "2025-03-01T15:16:30Z",
            "sha256": "47fde0731c15c3a884ceb4dd40deb651eb2998414cf1eadac95c58a0f4d132bb",
            "id": "pypi/2025-02-pydefender/pydefender",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "import_time": "2025-12-02T22:30:55.459826763Z"
        },
        {
            "source": "kam193",
            "modified_time": "2025-03-01T15:16:30Z",
            "sha256": "a1e2cc2d94eff74e302118c35c34f87e76175fe507facbe21c29883960c8223e",
            "id": "pypi/2025-02-pydefender/pydefender",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "import_time": "2025-12-02T23:07:18.483745497Z"
        },
        {
            "versions": [
                "0.0.1"
            ],
            "modified_time": "2025-03-01T15:16:30Z",
            "sha256": "2df02a7ddd673cba32eb57e59dbffb385ec1c30f1c8d7e688472a17b5a18b62b",
            "id": "pypi/2025-02-pydefender/pydefender",
            "source": "kam193",
            "import_time": "2025-12-10T21:38:57.699308036Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / pydefender

Package

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

Affected ranges

Affected versions

0.*
0.0.1

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/pydefender/MAL-2025-191833.json"