Ransom_Win32_FileCryptor_N_MTB

YARA detection rule by roadwy

Ransom:Win32/FileCryptor.N!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00

rule Ransom_Win32_FileCryptor_N_MTB{
	meta:
		description = "Ransom:Win32/FileCryptor.N!MTB,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00 "
		
	strings :
		$a_81_0 = {2f 63 20 64 65 6c 20 43 3a 2a 20 2f 73 20 2f 71 } 		$a_81_1 = {59 6f 75 20 43 61 6e 27 74 20 64 65 63 72 79 70 74 } 		$a_81_2 = {52 61 6e 73 6f 6d 6e 6f 74 65 } 		$a_81_3 = {79 6f 75 72 20 66 69 6c 65 73 20 77 69 6c 6c 20 62 65 20 64 65 6c 65 74 65 64 20 66 6f 72 65 76 65 72 } 		$a_81_4 = {52 65 64 65 72 5f 6c 6f 63 6b } 		$a_81_5 = {2f 63 20 74 61 73 6b 6b 69 6c 6c 20 2f 69 6d 20 65 78 70 6c 6f 72 65 72 2e 65 78 65 20 2f 66 } 	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 ]]

5db4cb5f-0b9a-4106-b71f-8cdf2ae5df75

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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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