MAL-2025-191782

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/loggerex/MAL-2025-191782.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2025-191782
Published
2025-08-01T15:57:37Z
Modified
2025-12-31T02:54:50.142393Z
Summary
Malicious code in loggerex (PyPI)
Details

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

Source: kam193 (7a27ca3e673f54a1e041d55e84b8a0e871239df2331c9a3fd1dbe20d1fa86f56)

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/loggerex",
            "modified_time": "2025-08-01T15:57:37.353166Z",
            "import_time": "2025-12-02T22:30:55.313858062Z",
            "sha256": "3177e123c0555fb064b49aa1a070e749e5358b403c1ff877d70c756950f1b10d",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "kam193"
        },
        {
            "id": "pypi/2025-07-loquru/loggerex",
            "modified_time": "2025-08-01T15:57:37.353166Z",
            "import_time": "2025-12-02T23:07:18.340590241Z",
            "sha256": "7a27ca3e673f54a1e041d55e84b8a0e871239df2331c9a3fd1dbe20d1fa86f56",
            "ranges": [
                {
                    "type": "ECOSYSTEM",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "kam193"
        },
        {
            "versions": [
                "0.7.4",
                "0.7.6",
                "0.7.5"
            ],
            "id": "pypi/2025-07-loquru/loggerex",
            "modified_time": "2025-08-01T15:57:37.353166Z",
            "import_time": "2025-12-10T21:38:57.573369848Z",
            "sha256": "bcb53463166fd2bbbd8749db30bbc923dd192ac35348d123548a3ae4a64ac65d",
            "source": "kam193"
        },
        {
            "versions": [
                "0.7.4",
                "0.7.5",
                "0.7.6"
            ],
            "id": "pypi/2025-07-loquru/loggerex",
            "modified_time": "2025-08-01T15:57:37.353166Z",
            "import_time": "2025-12-30T22:39:04.123757641Z",
            "sha256": "77058b0f2ca4f22fe73bd6290136df9a273f4f9473dc8840146776b480d2026e",
            "source": "kam193"
        }
    ]
}
References
Credits

Affected packages

PyPI / loggerex

Package

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

Affected ranges

Affected versions

0.*
0.7.4
0.7.5
0.7.6

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/loggerex/MAL-2025-191782.json"