Ransom_MSIL_Filecoder_EJ_MTB

YARA detection rule by roadwy

Ransom:MSIL/Filecoder.EJ!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00

rule Ransom_MSIL_Filecoder_EJ_MTB{
	meta:
		description = "Ransom:MSIL/Filecoder.EJ!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00 "
		
	strings :
		$a_81_0 = {44 49 53 4b 5f 45 4e 43 4f 44 45 52 2e 65 78 65 } 		$a_81_1 = {44 49 53 4b 5f 45 4e 43 4f 44 45 52 2e 70 64 62 } 		$a_81_2 = {45 4e 43 52 59 50 54 45 44 } 		$a_81_3 = {45 4e 43 52 59 50 54 45 44 44 } 		$a_81_4 = {47 45 54 5f 43 49 50 48 45 52 5f 4b 45 59 } 		$a_81_5 = {2e 66 6d 66 67 6d 66 67 6d } 	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+(#a_81_5  & 1)*1) >=5
 
}

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

fe22e301-2b34-4907-ad14-7c2ea0fc0e87

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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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