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Corona Ransomware (.part → <Original Filename>.<Original Extension>)

  • Distribution Method : Unknown
  • MD5 : fcc1d31bcb5dfa32df25d14579f82514
  • Major Detection Name : Trojan.Ransom.Hakbit (ALYac), a variant of MSIL/Filecoder.VL (ESET)
  • Encrypted File Pattern : .part → <Original Filename>.<Original Extension>
  • Malicious File Creation Location : C:\Users\%UserName%\Desktop\HELP_ME_RECOVER_MY_FILES.txt
  • Payment Instruction File : HELP_ME_RECOVER_MY_FILES.txt
  • Major Characteristics :
     - Offline Encryption
     - Hakbit / RAVACK Ransomware series
     - Block processes execution (mspub.exe, mydesktopqos.exe, mydesktopservice.exe)
     - Stop multi services (avpsus, BMR Boot Service, McAfeeDLPAgentService, mfewc, SQLTELEMETRY, SQLWriter etc.)
     - Disable system restore ("vssadmin.exe" Delete Shadows /all /quiet, "vssadmin.exe" resize shadowstorage /for=<Drive Letter>: /on=<Drive Letter>: /maxsize=401MB, "vssadmin.exe" resize shadowstorage /for=<Drive Letter>: /on=<Drive Letter>: /maxsize=unbounded)