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}_$/
Ransom Note and Payment Demands
After encrypting files, Nemty displays ransom notes demanding payment for file recovery:
NEMTY-DECRYPT.txt
Ransom message:
notes/NEMTY-DECRYPT.txt
Note locations:
EveryFolder
/^_NEMTY_[a-zA-Z0-9]{7}_-DECRYPT\.txt$/
Ransom message:
notes/_NEMTY_UOETFFO_-DECRYPT.txt
Note locations:
EveryFolder
/^NEMTY_[a-zA-Z0-9]{7}-DECRYPT\.txt$/
Ransom message:
notes/NEMTY_MKL9TFJ-DECRYPT.txt
Note locations:
EveryFolder
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
Elastio Can Help You
Don't let Nemty ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
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