Ransomware Research

Nemty Ransomware

Nemty is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Nemty, Nemty Revenge 2.0, Nemty Doxware.

Quick Facts

Ransomware Family
Nemty
First Seen
August 1, 2019
Known Aliases
NemtyNemty Revenge 2.0Nemty Doxware

How Nemty Ransomware Works

Targeted Files

Encrypts first 0x19000 bytes https://app.any.run/tasks/7d11ffba-024e-45a5-b9e7-1969d263c2b9/ https://app.any.run/tasks/43e82b2e-6fdc-47a3-aaf1-354ca971d9eb/ Checks ip via api.ipify.org, api.db-ip.com 82316b71fe6652a2eba0e5b6a86ba7325de04f413be388b2099fe43f6e7f5358 -> req C&C (can be emulated with FakeNet) 5583b4814f68295a65729c4e6c76e7a896cafcced26192f01813e7a298e7d4d0 -> req C&C (can be emulated with FakeNet) 5a4f7aee3a1f8b2129044a2ffe51a79b421974ffbfbd00830e3a61d9bacadb5b -> req C&C (can be emulated with FakeNet)

File Encryption Patterns

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

File extensions added after encryption:

..nemty./\._NEMTY_[a-zA-Z0-9]{7}_$/

Ransom Note and Payment Demands

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

fileNEMTY-DECRYPT.txt

Ransom message:

notes/NEMTY-DECRYPT.txt

Note locations:

EveryFolder
file/^_NEMTY_[a-zA-Z0-9]{7}_-DECRYPT\.txt$/

Ransom message:

notes/_NEMTY_UOETFFO_-DECRYPT.txt

Note locations:

EveryFolder
file/^NEMTY_[a-zA-Z0-9]{7}-DECRYPT\.txt$/

Ransom message:

notes/NEMTY_MKL9TFJ-DECRYPT.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/god.bmp

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Nemty ransomware:

  • 9eenGboYYNXbTO5.exe
  • Decryptor.exe
  • Cashback.exe
  • Cashback.bin
  • D3BMN70B.exe
  • 2c41b93add9ac508_ironman.exe
  • ironman.exe
  • $RJD3Z6K.TMP
  • 부당 전자상거래 위반행위 안내.hwp
  • 이력서_200506(뽑아주시면 최선을 다해서 열심히 하겠습니다)1.exe

Recovery and Decryption Tools

Good news! Decryption tools are available for Nemty ransomware:

0

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About This Analysis

This Nemty 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 Nemty.

Last updated: July 30, 2025

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What is Nemty Ransomware? | Elastio