Ransomware Research

Bitpaymer Ransomware

Bitpaymer is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: WPEncrypt, FriedEx, Bitpaymer NextGen.

Quick Facts

Ransomware Family
Bitpaymer
First Seen
July 1, 2017
Known Aliases
WPEncryptFriedExBitpaymer NextGen

How Bitpaymer Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..locked..LOCK..lmtgr0up

Ransom Note and Payment Demands

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

file{origin_filename}.readme_txt

Ransom message:

notes/DOC1.docx.readme_txt

Note locations:

EveryFile
file{origin_filename}.lmtgr0up_readme

Ransom message:

notes/descript.ion.lmtgr0up_readme

Note locations:

EveryFile
fileHOW_TO_DECRYPT.txt

Ransom message:

notes/HOW_TO_DECRYPT.txt

Note locations:

RootDiscsDesktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Bitpaymer ransomware:

  • apisetstub
  • mafgvag
  • Xrj.exe
  • yZj:exe
  • 0Wk7JMR:exe
  • AFPtT:exe
  • SjwFY.exe
  • 3IkZZ0:exe
  • ZZi2x:exe
  • 841913.exe
  • Bit Paymer.exe
  • BitPaymer.exe
  • Ransomware 1.exe
  • DUe1bLM.exe
  • 5MgqQ.exe
  • EqMz:exe
  • YpoiVa:exe
  • U7zj:exe
  • NlsData081a
  • NlsData081a.dll
  • 2EwLi.exe
  • NONLMB~1.EXE
  • W0MJTB~1.locked:bin
  • TieringEngineService.exe
  • 3AQAQH~1:bin
  • BAG9LA~1.EXE
  • mzj8Si:bin
  • N6F1OD~1.EXE
  • VMNRG2~1:bin
  • WASpotLife.DLL
  • msdtc.exe
  • 2PMa:exe
  • PrkgN:exe
  • Fqj9g5v:exe
  • 351:exe
  • 4RnuBxi:exe

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About This Analysis

This Bitpaymer 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 Bitpaymer.

Last updated: October 30, 2025

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