Ransomware Research

Flyper Ransomware

Flyper is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Flyper
First Seen
September 1, 2016

How Flyper Ransomware Works

Targeted Files

http://www.bleepingcomputer.com/forums/t/626330/kawaiilocker-ransomware-help-support-how-decrypt-filestxt/Thanks:MalwareHunterTeam Requires C&C

File Encryption Patterns

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

File extensions added after encryption:

..locked..flyper

Ransom Note and Payment Demands

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

fileRead_Me.txt

Ransom message:

notes/Read_Me.txt

Note locations:

Desktop
fileinstruction.txt

Ransom message:

notes/instruction.txt

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Flyper ransomware:

  • hidden-tear.exe
  • aa
  • Ox402QK.dwg
  • hiddwntear.exe
  • flyper.exe
  • inInvoice.exe

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About This Analysis

This Flyper 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 Flyper.

Last updated: July 30, 2025

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