Ransomware Research

Avanzi Ransomware

Avanzi is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2024, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Avanzi
First Seen
January 1, 2024

How Avanzi Ransomware Works

Targeted Files

Full extension -> .id-C63F241F.[avanziahelp@cock.li].avan

File Encryption Patterns

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

File extensions added after encryption:

..avan

Ransom Note and Payment Demands

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

fileinfo.txt

Ransom message:

notes/info.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUpRoaming

Technical Indicators

Associated Executable Files

The following executable files are associated with Avanzi ransomware:

  • payload.exe

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About This Analysis

This Avanzi 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 Avanzi.

Last updated: July 30, 2025

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