Ransom_MSIL_FileCrypter_NB_MTB

YARA detection rule by roadwy

Ransom:MSIL/FileCrypter.NB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 07 00 00

rule Ransom_MSIL_FileCrypter_NB_MTB{
	meta:
		description = "Ransom:MSIL/FileCrypter.NB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 07 00 00 "
		
	strings :
		$a_81_0 = {68 61 63 6b 65 72 32 } 		$a_81_1 = {79 6f 75 20 61 72 65 20 65 6e 63 72 79 70 74 65 64 20 77 69 74 68 20 70 6f 77 65 72 66 75 6c 20 6d 69 6c 69 74 61 72 79 20 67 72 61 64 65 20 52 61 6e 73 6f 6d 77 61 72 65 2f 44 6f 78 77 61 72 65 } 		$a_81_2 = {70 61 79 20 75 73 20 24 34 2e 35 20 4d 69 6c 6c 69 6f 6e 20 6f 66 20 42 69 74 63 6f 69 6e 20 77 69 74 68 69 6e 20 35 32 20 68 6f 75 72 73 } 		$a_81_3 = {59 4f 55 52 20 52 45 50 55 54 41 54 49 4f 4e 20 57 49 4c 4c 20 42 45 20 4f 56 45 52 } 		$a_81_4 = {2e 4e 69 62 69 72 75 } 		$a_81_5 = {59 4f 55 20 48 41 56 45 20 42 45 45 4e 20 48 41 43 4b 45 44 } 		$a_81_6 = {41 6c 6c 20 59 6f 75 72 20 46 69 6c 65 73 20 54 72 61 6e 73 66 65 72 65 64 20 54 6f 20 48 61 63 6b 65 72 73 20 52 65 6d 6f 74 65 20 53 65 72 76 65 72 } 	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+(#a_81_6  & 1)*1) >=7
 
}

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

d3da786d-9783-4d10-90bd-ad4df1d5d454

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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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