PowerShell_JAB_B64

Description

Detects base464 encoded $ sign at the beginning of a string

Query · yara

strings:
      $s1 = "('JAB" ascii wide
      $s2 = "powershell" nocase
   condition:
      filesize < 30KB and all of them
Raw source PowerShell_JAB_B64 · YARA
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Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
rule PowerShell_JAB_B64 {
   meta:
      description = "Detects base464 encoded $ sign at the beginning of a string"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://twitter.com/ItsReallyNick/status/980915287922040832"
      date = "2018-04-02"
      score = 60
      id = "c18fa17b-aaa5-5a89-bc25-3cc51b5af103"
   strings:
      $s1 = "('JAB" ascii wide
      $s2 = "powershell" nocase
   condition:
      filesize < 30KB and all of them
}

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