Ransomware Research

RensenWare Ransomware

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

Quick Facts

Ransomware Family
RensenWare
First Seen
April 1, 2017

How RensenWare Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..RENSENWARE..Haruna..KASHIMA

Ransom Note and Payment Demands

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

message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

Technical Indicators

Associated Executable Files

The following executable files are associated with RensenWare ransomware:

  • Rensenware.exe
  • rensenWare.exe
  • Trojan.Ransom.Rensenware
  • Rensen.exe
  • rensenware.exe
  • 1kkUiAnQvSWUv2.exe
  • Trojan.Ransom.Rensenware.exe
  • RensenWare.exe
  • Trojan.Ransom.RensenWare.exe
  • XDDWDx.exe
  • XDDWDx.exe.exe
  • Ransomware HiddenTears.exe
  • 684.json
  • qae8v0xd7s2iDQ.exe
  • Tda0xbFhlh9afR.exe
  • myfile.exe
  • RensenwareGame.exe
  • wefe.bin
  • ESZHSKiB
  • ransomware RensenWare

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About This Analysis

This RensenWare 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 RensenWare.

Last updated: July 30, 2025

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