MAL-2025-191784

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/loquru/MAL-2025-191784.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2025-191784
Published
2025-08-01T13:47:41Z
Modified
2025-12-12T20:38:37.955286Z
Summary
Malicious code in loquru (PyPI)
Details

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

Source: kam193 (a98209ec0f506986521ebd7b24de4f266f6bb61aba50f2dc511c391f1037848b)

It's a clone of "loguru" package which on import loads a second-stage script from loguru[.]guru. This makes a few checks and downloads the next stage, which is a code obfuscated with PyArmor with unclear behaviour.

The way the malicious code has been embedded could be called a "sophisticated" threat. The code is in the _logger.py in two places: the payload in L2242 as a long string constraint of only whitespaces, which are then transformed into bits and bytes, and later compiled and executed using "types.FunctionType" during initialisation of Core class.

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

Campaign: 2025-07-loquru

Reasons (based on the campaign):

  • typosquatting

  • obfuscation

  • clones-real-package

  • Downloads and executes a remote malicious script.

Database specific 
{
    "iocs": {
        "domains": [
            "loguru.guru"
        ],
        "urls": [
            "https://loguru.guru/version/is_match_revision",
            "https://loguru.guru/version/code"
        ]
    },
    "malicious-packages-origins": [
        {
            "id": "pypi/2025-07-loquru/loquru",
            "modified_time": "2025-08-01T13:47:41.367157Z",
            "import_time": "2025-12-02T22:30:55.317137131Z",
            "sha256": "641cc2cb716a258c01b21b9d995e1352779eecf22663d8101ac7e946d362d96b",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "kam193"
        },
        {
            "id": "pypi/2025-07-loquru/loquru",
            "modified_time": "2025-08-01T13:47:41.367157Z",
            "import_time": "2025-12-02T23:07:18.343821479Z",
            "sha256": "a98209ec0f506986521ebd7b24de4f266f6bb61aba50f2dc511c391f1037848b",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "kam193"
        },
        {
            "versions": [
                "0.7.3"
            ],
            "id": "pypi/2025-07-loquru/loquru",
            "modified_time": "2025-08-01T13:47:41.367157Z",
            "import_time": "2025-12-10T21:38:57.577061693Z",
            "sha256": "45d6403aae40fb99fdee2c26853d75d2c1616fccb919fb8b28988ec5d535bada",
            "source": "kam193"
        }
    ]
}
References
Credits

Affected packages

PyPI / loquru

Package

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

Affected ranges

Affected versions

0.*
0.7.3

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/loquru/MAL-2025-191784.json"