Ransomware Research

Karo Ransomware

Karo is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Karo
First Seen
June 1, 2017

How Karo Ransomware Works

Targeted Files

Requires C&C (in TOR) to communicate

File Encryption Patterns

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

File extensions added after encryption:

..ipygh

Ransom Note and Payment Demands

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

fileReadMe.html

Ransom message:

notes/ReadMe.html

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Karo ransomware:

  • karo.exe
  • svchost.exe
  • s.exe--
  • sample (60).exe%vir
  • CryptoBubble_ransomware_Italy
  • t.exe
  • 3.exe

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About This Analysis

This Karo 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 Karo.

Last updated: July 30, 2025

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