Kingslayer_codekey

YARA detection rule by RSA Research · GPL-2.0

detects Win32 files signed with stolen code signing key used in Kingslayer attack

rule Kingslayer_codekey
{
meta:
	description = "detects Win32 files signed with stolen code signing key used in Kingslayer attack"
	author = "RSA Research"
	reference = "http://firstwat.ch/kingslayer"
	date = "03 February 2017"
	hash0 = "fbb7de06dcb6118e060dd55720b51528"
	hash1 = "3974a53de0601828e272136fb1ec5106"
	hash2 = "f97a2744a4964044c60ac241f92e05d7"
	hash3 = "76ab4a360b59fe99be1ba7b9488b5188"
	hash4 = "1b57396c834d2eb364d28eb0eb28d8e4"
strings:
	$val0 = { 31 33 31 31 30 34 31 39 33 39 31 39 5A 17 0D 31 35 31 31 30 34 31 39 33 39 31 39 5A }
	$ven0 = { 41 6C 74 61 69 72 20 54 65 63 68 6E 6F 6C 6F 67 69 65 73 }
condition:
	uint16(0) == 0x5A4D and $val0 and $ven0
}

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

bc3af3be-f793-40d3-a249-8bfe41f9bcd5

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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.

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

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