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Jigsaw Ransomware (.##ENCRYPTED_BY_pablukl0cker##)

  • Distribution Method : Unknown
 
  • MD5 : b31b57abd6851f61c2c75c2bc3c19788
 
  • Major Detection Name : a variant of MSIL/Filecoder.Jigsaw.B (ESET), Ransom.Jigsaw.Generic (Malwarebytes)
 
  • Encrypted File Pattern : .##ENCRYPTED_BY_pablukl0cker##
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\OfficeUpdate
     - C:\Users\%UserName%\AppData\Local\OfficeUpdate\MicrosoftWordUpdate.exe
     - C:\Users\%UserName%\AppData\Roaming\MozillaFirefoxUpdate
     - C:\Users\%UserName%\AppData\Roaming\MozillaFirefoxUpdate\update.exe
     - C:\Users\%UserName%\AppData\Roaming\System32Work
     - C:\Users\%UserName%\AppData\Roaming\System32Work\Address.txt
     - C:\Users\%UserName%\AppData\Roaming\System32Work\dr
     - C:\Users\%UserName%\AppData\Roaming\System32Work\EncryptedFileList.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Ramsey Ransomware series
     - The English and Polish users targeted
     - Create a fake ".NET Framework Initialization Error" message
     - Automatically delete encrypted files every hour

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