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BitPaymer Ransomware (.cmsnwned)

  • Distribution Method : Unknown
 
  • MD5 : ba167e9c0645c0304af9c779b1f4e322
 
  • Major Detection Name : Ransom-IEncrypt (McAfee), Ransom.Win32.ICRYPT.SMGC.hp (Trend Micro)
 
  • Encrypted File Pattern : .cmsnwned
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\<Random>.tmp
     - C:\Users\%UserName%\AppData\Roaming\<Random Foldername>
     - C:\Users\%UserName%\AppData\Roaming\<Random Foldername>\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\<Random>
     - C:\Users\%UserName%\AppData\Roaming\<Random>:bin
 
  • Payment Instruction File : <Original Filename>.<Original Extension>.cmsnwned_readme
 
  • Major Characteristics :
     - Offline Encryption
     - Streamer Ransomware series
     - Creates executable ADS (Alternate Data Stream) file. When this file executes, it replaces one of the windows service to ransomware itself.
     - Disable system restore (vssadmin.exe Delete Shadows /All /Quiet)

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