Ransom_Win32_FileCryptor_K_MTB

YARA detection rule by roadwy

Ransom:Win32/FileCryptor.K!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00

rule Ransom_Win32_FileCryptor_K_MTB{
	meta:
		description = "Ransom:Win32/FileCryptor.K!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_81_0 = {45 6e 63 72 79 70 74 65 64 20 62 79 20 42 6c 61 63 6b 52 61 62 62 69 74 2e } 		$a_81_1 = {68 6f 77 5f 74 6f 5f 64 65 63 72 79 70 74 2e 68 74 61 } 		$a_81_2 = {45 6e 63 72 79 70 74 20 61 6c 6c } 		$a_81_3 = {45 6e 63 72 79 70 74 65 64 20 66 69 6c 65 73 3a } 		$a_81_4 = {6f 64 73 2c 78 61 72 2c 78 6c 72 2c 78 6c 73 2c 78 6c 73 62 2c 78 6c 73 6d 2c 78 6c 73 78 2c 78 6c 74 2c 78 6c 74 6d 2c 78 6c 74 78 2c 61 73 70 } 	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 ]]

1a7bd595-3eb1-4221-8878-f24449f9dc65

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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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