SUSP_Script_Base64_Blocks_Jun20_1_RID32AF

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

Detects suspicious file with base64 encoded payload in blocks

rule SUSP_Script_Base64_Blocks_Jun20_1_RID32AF : DEMO SCRIPT SUSP T1132_001 {
   meta:
      description = "Detects suspicious file with base64 encoded payload in blocks"
      author = "Florian Roth"
      reference = "https://posts.specterops.io/covenant-v0-5-eee0507b85ba"
      date = "2020-06-05 14:15:41"
      score = 70
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      
      tags = "DEMO, SCRIPT, SUSP, T1132_001"
      minimum_yara = "3.5.0"
      
   strings:
      $sa1 = "<script language=" ascii
      $sb2 = { 41 41 41 22 2B 0D 0A 22 41 41 41 } 
   condition: 
      all of them
}

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

4b63ade5-b925-434e-90f8-bc8bcd77af70

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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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