Ransomware Research

Zsszyy Ransomware

Zsszyy is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Zsszyy
First Seen
March 1, 2025

How Zsszyy Ransomware Works

Targeted Files

0bf91eba6d40137e17ade8bfa49c39d606c2453233e35e022e5293878ca0f6f6 -> for linux ESXI Full extension -> .{A4EDA8CF-78F3-ADF1-914B-5F2CBAAA094E}.zsszyy

File Encryption Patterns

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

File extensions added after encryption:

..zsszyy

Ransom Note and Payment Demands

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

fileREADME.TXT

Ransom message:

notes/README.TXT

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Zsszyy ransomware:

  • encrypter.7z
  • encrypter-linux-esxi-x64.run
  • bnsnsilm.exe
  • encrypter-windows-gui-x86.exe

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About This Analysis

This Zsszyy 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 Zsszyy.

Last updated: July 30, 2025

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