Ransomware Research

ZuCaNo Ransomware

ZuCaNo is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2021, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
ZuCaNo
First Seen
June 1, 2021

How ZuCaNo Ransomware Works

File Encryption Patterns

ZuCaNo modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..ZuCaNo

Ransom Note and Payment Demands

After encrypting files, ZuCaNo displays ransom notes demanding payment for file recovery:

fileHOW TO DECRYPT FILES.txt

Ransom message:

notes/HOW TO DECRYPT FILES.txt

Note locations:

EveryFolder

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About This Analysis

This ZuCaNo ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like ZuCaNo.

Last updated: July 30, 2025