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Nemty v2.2 Ransomware (.NEMTY_<7-Digit Random> / NEMTY_<7-Digit Random>-DECRYPT.txt)

  • Distribution Method : Mail attachment file
 
  • MD5 : 6fb8cd3afe6619493d62965ad528d0fb
 
  • Encrypted File Pattern : .NEMTY_<7-Digit Random>
 
  • Malicious File Creation Location : C:\Users\%UserName%\NEMTY_<7-Digit Random>-DECRYPT.txt
 
  • Payment Instruction File : NEMTY_<7-Digit Random>-DECRYPT.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Checking IP address (api.db-ip.com)
     - Block processes execution (excel.*, oracle.*, outlook.*, sql.*, thunderbird.*, winword.* etc.)
     - Stop multi services (AcrSch2Svc.*, Apache2.4.*, DbxSvc.*, MSSQL$SQLEXPRESS.*, OracleXETNSListener.*, SQLWriter.* etc.)
     - Disable system restore (vssadmin resize shadowstorage /for=<Drive Letter>: /on=<Drive Letter>: /maxsize=401MB, vssadmin resize shadowstorage /for=<Drive Letter>: /on=<Drive Letter>: /maxsize=unbounded, vssadmin.exe delete shadows /all /quiet, bcdedit /set {default} bootstatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet, wmic shadowcopy delete)

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