Ransom_Win64_Nokoyawa_BA

YARA detection rule by roadwy

Ransom:Win64/Nokoyawa.BA,SIGNATURE_TYPE_PEHSTR_EXT,02 00 02 00 02 00 00

rule Ransom_Win64_Nokoyawa_BA{
	meta:
		description = "Ransom:Win64/Nokoyawa.BA,SIGNATURE_TYPE_PEHSTR_EXT,02 00 02 00 02 00 00 "
		
	strings :
		$a_03_0 = {41 8b c2 4d 8d 40 ?? 33 c2 81 c2 ?? ?? ?? ?? 69 c8 ?? ?? ?? ?? 81 f1 ?? ?? ?? ?? 8b c1 c1 e8 0d 33 c1 69 c8 ?? ?? ?? ?? 8b c1 c1 e8 0f 33 c1 41 89 40 fc 49 83 e9 01 75 } 		$a_01_1 = {4e 4f 4b 4f 59 41 57 41 20 76 32 2e 30 2e 70 64 62 } 	condition:
		((#a_03_0  & 1)*1+(#a_01_1  & 1)*1) >=2
 
}

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

954621f4-618a-4e8b-a170-0f2f86ace07b

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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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