Ransom_MSIL_FileCryptor_PF_MTB

YARA detection rule by roadwy

Ransom:MSIL/FileCryptor.PF!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00

rule Ransom_MSIL_FileCryptor_PF_MTB{
	meta:
		description = "Ransom:MSIL/FileCryptor.PF!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {42 69 74 44 65 63 6f 64 65 72 } 		$a_01_1 = {44 65 63 6f 64 65 57 69 74 68 4d 61 74 63 68 42 79 74 65 } 		$a_01_2 = {24 62 65 32 37 35 30 39 61 2d 63 31 31 62 2d 34 33 31 34 2d 62 30 32 63 2d 36 33 35 35 64 35 32 61 63 65 38 61 } 		$a_80_3 = {43 52 59 50 54 2e 65 78 65 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_80_3  & 1)*1) >=4
 
}

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

d2e1b6fd-e805-46ff-b2fb-3c7de94a69c2

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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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