Ransom_MSIL_Blocker_A_MTB

YARA detection rule by roadwy

Ransom:MSIL/Blocker.A!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00

rule Ransom_MSIL_Blocker_A_MTB{
	meta:
		description = "Ransom:MSIL/Blocker.A!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_81_0 = {65 78 70 6f 72 74 20 48 4b 45 59 5f 43 55 52 52 45 4e 54 5f 55 53 45 52 5c 53 6f 66 74 77 61 72 65 5c 4d 69 63 72 6f 73 6f 66 74 5c 57 69 6e 64 6f 77 73 5c 43 75 72 72 65 6e 74 56 65 72 73 69 6f 6e 5c 52 75 6e } 		$a_81_1 = {57 69 6e 44 65 66 65 6e 64 65 72 } 		$a_81_2 = {46 61 69 6c 65 64 20 74 6f 20 73 65 74 20 68 6f 6f 6b } 		$a_81_3 = {53 74 61 72 74 75 70 44 65 6c 61 79 49 6e 4d 53 65 63 } 		$a_81_4 = {5c 42 4c 4f 43 4b 5c 6f 62 6a 5c 44 65 62 75 67 5c 42 4c 4f 43 4b 2e 70 64 62 } 	condition:
		((#a_81_0  & 1)*1+(#a_81_1  & 1)*1+(#a_81_2  & 1)*1+(#a_81_3  & 1)*1+(#a_81_4  & 1)*1) >=5
 
}

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

ab6b27e9-9aaa-4384-b3b3-04e1404b20e2

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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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