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Rietspoof yara

James_inthe_box Feb 16th, 2019 (edited) 710 Never
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  1. rule Rietspoof_bin
  2. {
  3.     meta:
  4.         description = "Rietspoof bot"
  5.         author = "James_inthe_box"
  6.         reference = "https://blog.avast.com/rietspoof-malware-increases-activity"
  7.         date = "2019/02"
  8.         maltype = "Downloader"
  9.        
  10.     strings:
  11.         $mz = { 4d 5a }
  12.         $string1 = "RAM:"
  13.         $string2 = "CPU:"
  14.         $string3 = "USER: admin"
  15.         $string4 = "USER: user"
  16.         $string5 = "data.dat"
  17.        
  18.     condition:
  19.         ($mz at 0) and (all of ($string*)) and filesize < 3MB
  20. }
  21.  
  22. rule Rietspoof_mem
  23. {
  24.     meta:
  25.         description = "Rietspoof bot"
  26.         author = "James_inthe_box"
  27.         reference = "https://blog.avast.com/rietspoof-malware-increases-activity"
  28.         date = "2019/02"
  29.         maltype = "Downloader"
  30.  
  31.     strings:
  32.         $string1 = "RAM:"
  33.         $string2 = "CPU:"
  34.         $string3 = "USER: admin"
  35.         $string4 = "USER: user"
  36.         $string5 = "data.dat"
  37.  
  38.     condition:
  39.         all of ($string*) and filesize > 100KB
  40. }
RAW Paste Data
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