Contains_UserForm_Object_3

YARA detection rule by Martin Willing (https://evild3ad.com) · GPL-2.0

Detect UserForm object in MS Office document. Attackers use UserForm objects to obfuscate their scripts and malicious code.

rule Contains_UserForm_Object_3 {
  meta:
    author      = "Martin Willing (https://evild3ad.com)"
    description = "Detect UserForm object in MS Office document. Attackers use UserForm objects to obfuscate their scripts and malicious code."
    alert       = "May used to store malicious code in a TextBox1 object embedded in a form object"
    reference   = "https://blogs.mcafee.com/mcafee-labs/macro-malware-associated-dridex-finds-new-ways-hide/"
    hash        = "13d4e6f0f7dc15ba17df91954de0b01d"
    date        = "2016-03-11"
    filetype    = "Office documents"

  strings:
    $a = "Microsoft Forms 2.0"      $b = "UserForm1"      $c = "TextBox1"  
  condition:
    all of them
}

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

1bcf7c86-4ce5-449d-a974-37d0f274ef3b

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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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