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Jigsaw Ransomware (.zemblax)

  • Distribution Method : Installation via LokiBot malware
 
  • MD5 : 2fec9bf50de5395f799b23a1099b10d6
 
  • Major Detection Name : MSIL/Filecoder.Jigsaw.R (ESET), Ransom.Jigsaw (Malwarebytes)
 
  • Encrypted File Pattern : .zemblax
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Drpbx
     - C:\Users\%UserName%\AppData\Local\Drpbx\drpbx.exe
     - C:\Users\%UserName%\AppData\Roaming\Frfx
     - C:\Users\%UserName%\AppData\Roaming\Frfx\firefox.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
     - Create a fake ".NET Framework Initialization Error" message
     - Automatically delete encrypted files every hour

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