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  • Distribution Method : Disguised as a Fake Stop ransomware recovery tool
 
  • MD5 : 6fbb86f54ecd1ed4d517f95de2c149e2
 
  • Major Detection Name : a variant of MSIL/Filecoder.Zorab.A (ESET), Ransom.Zorba (Malwarebytes)
 
  • Encrypted File Pattern : .ZRB
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\crab.exe
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\--DECRYPT--ZORAB.txt
     - <Drive Letter>:\autorun.inf
     - <Drive Letter>:\bot.exe
 
  • Payment Instruction File : --DECRYPT--ZORAB.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Disable and Blocks Registry Editor (regedit.exe)
     - Disable system restore (vssadmin.exe delete shadows /all /quiet, wmic.exe shadowcopy delete, bcdedit /set {default} bootstatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet)

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