APT / THREAT GROUP
Zumanek
2
aliases
Last seen:Mar 17, 2026
Intelligence Profile
According to ESET, this malware family was active exclusively in Brazil until the middle of 2020. It s identified by its method for obfuscating strings. It creates a function for each character of the alphabet and then concatenates the result of calling the correct functions in sequence.
Threat Analysis
Zumanek is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.
External References
Quick Facts
TypeAPT / Threat Group
Aliases2
Also Known As
win.zumanekZumanek
External Intelligence
Malpedia: win.zumanekResearch Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.