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XiaoBa Ransomware (.[BaYuCheng@yeah.net].china)

  • Distribution Method : Unknown
 
  • MD5 : b3bf0393423609ba40359e38827c1b68
 
  • Major Detection Name : Trojan.Ransom.XiaoBa (ALYac), Ransom_XIAOBA.THEOCAH (Trend Micro)
 
  • Encrypted File Pattern : .[BaYuCheng@yeah.net].china
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\ReadMe.hta
     - C:\Users\%UserName%\AppData\Local\Temp\ReadMe.vbs
     - C:\Users\%UserName%\AppData\Roaming\<Random>.exe
 
  • Payment Instruction File : ReadMe.hta
 
  • Major Characteristics :
     - Offline Encryption
     - The Chinese users targeted
     - Disable system restore (vssadmin delete shadow /all /quiet, wmic shadowcopy delete, bcdedit /set {default} boostatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet)
     - Encryption guide using Text-to-Speech (TTS) function

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