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PowerShell_Emp_Eval_Jul17_A1

YARA detection rule by Florian Roth (Nextron Systems) · Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE

Detects suspicious sample with PowerShell content

rule PowerShell_Emp_Eval_Jul17_A1 {
   meta:
      description = "Detects suspicious sample with PowerShell content "
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "PowerShell Empire Eval"
      date = "2017-07-27"
      hash1 = "4d10e80c7c80ef040efc680424a429558c7d76a965685bbc295908cb71137eba"
      id = "1699f153-f972-5e06-a94b-eb95af637e6b"
   strings:
      $s1 = "powershell" wide
      $s2 = "pshcmd" fullword ascii
   condition:
      ( uint16(0) == 0x5a4d and filesize < 30KB and all of them )
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

2d2107df-f9bd-4c85-8628-f7b3cbd4c647

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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