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AutoCryptor Ransomware (No Change / Korean Version)

  • Distribution Method : Mail attachment
 
  • MD5 : ba6ed06e4b5cc53fc71746ec4be4a419
 
  • Major Detection Name : Trojan.Ransom.AutoCryptor (ALYac), Ransom/W32.Blocker.302080 (nProtect)
 
  • Encrypted File Pattern : No Change
 
  • Malicious File Creation Location : C:\Users\%UserName%\AppData\Roaming\UpdateServices.exe
 
  • Payment Instruction File : THIS_YOU_MUST_READ.txt
 
  • Major Characteristics :
         - The Korean users targeted
         - Ransomware execution using Event Viewer (eventvwr.msc)
         - Disable system restore (vssadmin.exe delete shadows /ALL /Quiet)
         - Interrupt file recovery using "C:\Windows\System32\cmd.exe" cipher /w:<Drive Letter> commands
         - Encryption guide using Text-to-Speech (TTS) function

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