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Penta Ransomware (.PENTA)

  • Distribution Method : Unknown
 
  • MD5 : 5e685c7264d47dd21ebfa36a9437d142
 
  • Major Detection Name : Generic.Ransom.HydraCrypt.ED5CD204 (BitDefender), Ransom.HiddenTear!g1 (Norton)
 
  • Encrypted File Pattern : .PENTA
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PENTA_README.txt
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PENTA.url
     - C:\Users\%UserName%\AppData\Roaming\PENTA.exe
     - C:\Users\%UserName%\AppData\Roaming\PENTA_README.txt
     - <Drive Letter>:\PENTA.exe
 
  • Payment Instruction File : PENTA_README.txt
 
  • Major Characteristics :
     - Offline Encryption
     - BiggyLocker / Chaos Ransomware series
     - Disable system restore (vssadmin delete shadows /all /quiet, wmic shadowcopy delete, bcdedit /set {default} bootstatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet)
     - Changes desktop background (C:\Users\%UserName%\AppData\Local\Temp\<Random>.jpg)
     - Propagation using "<Drive Letter>:\PENTA.exe" file.

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