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Rapid Ransomware (.no_more_ransom)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
 
  • MD5 : ff5367b375ee5aa583927e8d4ac12d87
 
  • Major Detection Name : a variant of Win32/Filecoder.Rapid.A (ESET), Trojan.Win32.Z.Ransom.933376.A (ViRobot)
 
  • Encrypted File Pattern : .no_more_ransom
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Roaming\info.exe
     - C:\Users\%UserName%\AppData\Roaming\recovery.txt
     - C:\Windows\System32\Tasks\Encrypter
 
  • Payment Instrucition File : How Recovery Files.txt / recovery.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Disable and Blocks Task Manager (Taskmgr.exe)
     - Block processes execution (msftesql.exe, oracle.exe, sqlagent.exe, sqlbrowser.exe, sqlservr.exe, sqlwriter.exe etc.)
     - Disable system restore (vssadmin.exe Delete Shadows /All /Quiet, bcdedit.exe /set {default} recoveryenabled No, bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures, wbadmin DELETE SYSTEMSTATEBACKUP, wmic SHADOWCOPY DELETE)
     - Adds Encrypter to scheduler to execute "%AppData%\info.exe" every minute

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