SUSP_LNK_Contains_Padding

YARA detection rule by Greg Lesnewich · GPL-2.0

Look for LNK files with space padded commandline args

rule SUSP_LNK_Contains_Padding {
  meta:
    author      = "Greg Lesnewich"
    description = "Look for LNK files with space padded commandline args"
    date        = "2023-01-05"
    version     = "1.0"
    DaysofYARA  = "5/100"

  strings:
    $padding = { 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 }

  condition:
    uint32be(0x0) == 0x4c000000 and $padding
}

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

df40c1ad-e0b6-4dc9-8d68-a2d94cc9c292

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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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