Ransom_MSIL_Wanacry_B_MTB

YARA detection rule by roadwy

Ransom:MSIL/Wanacry.B!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00

rule Ransom_MSIL_Wanacry_B_MTB{
	meta:
		description = "Ransom:MSIL/Wanacry.B!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_81_0 = {59 6f 75 72 20 46 69 6c 65 73 20 48 61 76 65 20 62 65 65 6e 20 65 6e 63 72 79 70 74 65 64 } 		$a_81_1 = {53 68 61 72 65 57 61 72 65 5f 52 61 6e 73 6f 6d 77 61 72 65 } 		$a_81_2 = {57 61 6e 61 63 72 79 74 6f 72 } 		$a_81_3 = {45 74 68 65 72 65 75 6d 20 41 64 72 65 73 73 } 	condition:
		((#a_81_0  & 1)*1+(#a_81_1  & 1)*1+(#a_81_2  & 1)*1+(#a_81_3  & 1)*1) >=4
 
}

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

ecaf1c0f-b3a4-408b-801c-cba9a6527f93

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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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