SUSP_DropperBackdoor_Keywords_RID3273

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

Detects suspicious keywords that indicate a backdoor

rule SUSP_DropperBackdoor_Keywords_RID3273 : DEMO EXE FILE SUSP {
   meta:
      description = "Detects suspicious keywords that indicate a backdoor"
      author = "Florian Roth"
      reference = "https://blog.talosintelligence.com/2019/04/dnspionage-brings-out-karkoff.html"
      date = "2019-04-24 14:05:41"
      score = 75
      customer = "demo"
      license = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"
      hash1 = "cd4b9d0f2d1c0468750855f0ed352c1ed6d4f512d66e0e44ce308688235295b5"
      tags = "DEMO, EXE, FILE, SUSP"
      minimum_yara = "3.5.0"
      
   strings:
      $x4 = "DropperBackdoor" fullword wide ascii
   condition: 
      uint16 ( 0 ) == 0x5a4d and filesize < 1000KB and 1 of them
}

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

be52d366-32c3-44ff-a20d-6071c9421b25

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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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