PowerShell_Emp_Eval_Jul17_A2_RID3142

YARA detection rule by Florian Roth · CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/

Detects suspicious sample with PowerShell content

rule PowerShell_Emp_Eval_Jul17_A2_RID3142 : DEMO EXE FILE HKTL SCRIPT T1059_001 {
   meta:
      description = "Detects suspicious sample with PowerShell content "
      author = "Florian Roth"
      reference = "PowerShell Empire Eval"
      date = "2017-07-27 13:14:51"
      score = 90
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "e14c139159c23fdc18969afe57ec062e4d3c28dd42a20bed8ddde37ab4351a51"
      tags = "DEMO, EXE, FILE, HKTL, SCRIPT, T1059_001"
      minimum_yara = "3.5.0"
      
   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 ]]

ac0fdfc9-83f9-4cb7-96a8-56eeb80fafb1

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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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