VYPR

pypi · Malicious package advisory

Malware

flashsimplelogger

MAL-2025-191729

Malicious code in flashsimplelogger (PyPI)

Details


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## Source: kam193 (8c4753ee44e481f1f689cfaeddcddaef8dcdf86fbb1db19b3fe0acc2fadac305)
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.


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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.

Compromised versions (2)

  • 0.1.0
  • 0.2.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.