MAL-2026-15935Critical▾ Abyssal⚠ Exploited in the wildMalicious code in proxycer (PyPI)
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 52.3 · likelihood 0 · exploitation 18
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
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The package's top-level init.py imports starts.py, which is a single-line loader that reverses a ~100KB string literal, base64-decodes it, marshal.loads the result into a code object, and exec()s it. All actual functionality is concealed behind reversal + base64 + marshal bytecode obfuscation, with an empty README and empty PKG-INFO description. The obfuscated code object runs automatically on import proxycer, so any behavior it contains (credential access, outbound network, filesystem writes, persistence) executes on the installer's host without source visibility.
The provided functionality hides code that exfiltrates files to a remote location.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-09-asti
Reasons (based on the campaign):
files-exfiltration
action-hidden-in-lib-usage
target:android
proxycerRefer to the advisory for the patched release.
Field changes observed since this record was first indexed.