BlackDropper

YARA detection rule by enzok · NOASSERTION

BlackDropper

rule BlackDropper
{
    meta:
        author = "enzok"
        description = "BlackDropper"
        cape_type = "BlackDropper Payload"
        hash = "f8026ae3237bdd885e5fcaceb86bcab4087d8857e50ba472ca79ce44c12bc257"
    strings:
        $string1 = "BlackDropperCPP"
        $string2 = "Builder.dll"
        $string3 = "\\Builder.exe"
        $crypt1 = {33 D2 48 8B 44 24 ?? 48 8B 4C 24 ?? 48 F7 F1 48 8B C2 48 8B D0 48 8D 4C 24 ?? E8}
        $crypt2 = {0F BE 00 8B 4C 24 ?? 33 C8 8B C1 88 44 24 ?? 48 8B 54 24 ?? 48 8D 4C 24}
        $crypt3 = {E8 [4] 0F B6 4C 24 ?? 88 08 E9}
    condition:
        2 of ($string*) or 2 of ($crypt*)
}

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

f9f08a38-e9a9-404d-a5cf-4e9831010647

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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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