SUSP_PE_Discord_Attachment_Oct21_1_RID3357

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

Detects suspicious executable with reference to a Discord attachment (often used for malware hosting on a legitimate FQDN)

rule SUSP_PE_Discord_Attachment_Oct21_1_RID3357 : DEMO EXE FILE SUSP {
   meta:
      description = "Detects suspicious executable with reference to a Discord attachment (often used for malware hosting on a legitimate FQDN)"
      author = "Florian Roth"
      reference = "Internal Research"
      date = "2021-10-12 14:43:41"
      score = 70
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      
      tags = "DEMO, EXE, FILE, SUSP"
      minimum_yara = "3.5.0"
      
   strings:
      $x1 = "https://cdn.discordapp.com/attachments/" ascii wide
   condition: 
      uint16 ( 0 ) == 0x5a4d and filesize < 5000KB and 1 of them
}

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

3de06fd1-bfa3-4a54-9731-0d06497f7c0e

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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

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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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