semmver

Details

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## Source: amazon-inspector (8de323d5976a26f2d9540680d1706a53bcb3ca743409821e83f7a2f1b60e8594)
The package is a typosquat-style empty stub (semmver/__init__.py contains only __version__ = '1.0.0') whose only functional code is in setup.py. At pip install time, setup.py calls urllib.request.urlretrieve to download an opaque, unpinned binary from https://c2-worker.crawlnet-claim.workers.dev/dl/pyupd, writes it to a temporary path, and launches it via subprocess.Popen with start_new_session=True and stdout/stderr suppressed, detaching it from the installer process. There is no hash or signature verification, no pinning, and the destination host is unrelated to any legitimate utility purpose; the subdomain is self-labeled 'c2-worker'. Installing this package executes attacker-controlled code on the installer's machine.

## Source: kam193 (7b4ffebc6fe59fc1db7154c0a7ed9e6788d6a27ccea81fe1f4df432578b2c4d6)
During installation, package downloads and executes malware.


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


Campaign: 2026-10-semvver


Reasons (based on the campaign):


 - Downloads and executes a remote executable.


 - malware


 - typosquatting

Compromised versions (1)

• 1.0.0

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