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CrySis Ransomware (.[stopper@india.com].wallet)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
 
  • MD5 : 87e1146da45e0530016b109eca0bb8d1
 
  • Major Detection Name : Win32/Filecoder.Crysis.K (ESET), Ransom:Win32/Wadhrama.A!rsm (Microsoft)
 
  • Encrypted File Pattern : .[stopper@india.com].wallet
 
  • Malicious File Creation Location :
         - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.exe
         - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\INFORMATION HOoW TO DECRYYPT FILES.jpg
         - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\STOPPER.txt
         - C:\Users\%UserName%\AppData\Roaming\<Random>.exe
         - C:\Windows\System32\<Random>.exe
 
  • Payment Instruction File : STOPPER.txt
 
  • Major Characteristics :
         - Offline Encryption
         - Dharma / Troldesh Ransomware series
         - Disable system restore (vssadmin delete shadows /all /quiet)
         - Changes desktop background (C:\Users\%UserName%\INFORMATION HOoW TO DECRYYPT FILES.jpg)

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