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Nemty v1.5 Ransomware (._NEMTY_<7-Digit Random>_ / _NEMTY_<7-Digit Random>_-DECRYPT.txt)

  • Distribution Method : Mail attachment file
 
  • MD5 : 5da3327ff4ddd023f1e8c7791fb98a5a
 
  • Encrypted File Pattern : ._NEMTY_<7-Digit Random>_
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AdobeUpdate.exe
     - C:\Users\%UserName%\\_NEMTY_<7-Digit Random>_-DECRYPT.txt
     - C:\Windows\System32\Tasks\_NEMTY_<7-Digit Random>_
 
  • Payment Instruction File : _NEMTY_<7-Digit Random>_-DECRYPT.txt
 
  • Major Characteristics :
     - Checking IP address (api.db-ip.com)
     - Block processes execution (oracle.exe, outlook.exe, sql.exe, thunderbird.exe, winword.exe, wordpad.exe etc.)
     - Stop multi services (AcrSch2Svc, Apache2.4, DbxSvc, MSSQL$SQLEXPRESS, OracleXETNSListener, SQLWriter etc.)
     - Disable system restore (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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