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PowerShell_Emp_Eval_Jul17_A2

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_A2 {
   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 = "e14c139159c23fdc18969afe57ec062e4d3c28dd42a20bed8ddde37ab4351a51"
      id = "8f299fcd-156c-5ce1-8582-c2a4ff2c0cfc"
   strings:
      $x1 = "\\support\\Release\\ab.pdb" ascii
      $s2 = "powershell.exe" ascii fullword
   condition:
      ( uint16(0) == 0x5a4d and filesize < 200KB and all of them )
}

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

90bbee76-4cd9-4363-895e-d7a9a0b67d31

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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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