APT_APT41_CRACKSHOT

Description

Detects APT41 malware CRACKSHOT

Query · yara

strings:
      $x1 = ";procmon64.exe;netmon.exe;tcpview.exe;MiniSniffer.exe;smsniff.exe" ascii

      $s1 = "RunUrlBinInMem" fullword ascii
      $s2 = "DownRunUrlFile" fullword ascii
      $s3 = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36" fullword ascii
      $s4 = "%s|%s|%s|%s|%s|%s|%s|%dx%d|%04x|%08X|%s|%s" fullword ascii
   condition:
      uint16(0) == 0x5a4d and filesize < 250KB and ( 1 of ($x*) or 2 of them )
Raw source APT_APT41_CRACKSHOT · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
rule APT_APT41_CRACKSHOT {
   meta:
      description = "Detects APT41 malware CRACKSHOT"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://www.fireeye.com/blog/threat-research/2019/08/apt41-dual-espionage-and-cyber-crime-operation.html"
      date = "2019-08-07"
      score = 85
      hash1 = "993d14d00b1463519fea78ca65d8529663f487cd76b67b3fd35440bcdf7a8e31"
      id = "4ec34a77-dc7f-5f27-9f0a-c98438389018"
   strings:
      $x1 = ";procmon64.exe;netmon.exe;tcpview.exe;MiniSniffer.exe;smsniff.exe" ascii

      $s1 = "RunUrlBinInMem" fullword ascii
      $s2 = "DownRunUrlFile" fullword ascii
      $s3 = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36" fullword ascii
      $s4 = "%s|%s|%s|%s|%s|%s|%s|%dx%d|%04x|%08X|%s|%s" fullword ascii
   condition:
      uint16(0) == 0x5a4d and filesize < 250KB and ( 1 of ($x*) or 2 of them )
}

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