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Lost Files Ransomware (<Original Filename>.Lost_Files_Encrypt)

  • Distribution Method : Unknown
 
  • MD5 : a5ed2935a9f85c279fce7dde74252434
 
  • Major Detection Name : Ransom.HiddenTear (Malwarebytes), Ransom_RAMSIL.SM (Trend Micro)
 
  • Encrypted File Pattern : <Original Filename>.Lost_Files_Encrypt
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows.lnk
     - C:\Users\%UserName%\Documents\Test_Folder
     - C:\Users\%UserName%\Documents\Test_Folder\Resources
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\32BitRun.exe
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\Installer_exe.exe
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\SecurityUpdater.exe.exe
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\ShortCutVBS.vbs
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\Temp_Test.tester
     - C:\Users\%UserName%\Documents\Test_Folder\Resources\Windows.LNK
     - C:\Users\%UserName%\Documents\Test_Folder\Windows Security Scanner.exe
 
  • Payment Instruction File : Ransomware Lost Files Message.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Wiper method
     - Create a fake "Windows Security Scanner" installation

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