Ransom_MSIL_FileCrypter_MK_MTB_5

YARA detection rule by roadwy

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

rule Ransom_MSIL_FileCrypter_MK_MTB_5{
	meta:
		description = "Ransom:MSIL/FileCrypter.MK!MTB,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 07 00 00 "
		
	strings :
		$a_81_0 = {5f 72 65 61 64 6d 65 2e 74 78 74 } 		$a_81_1 = {41 6c 6c 20 79 6f 75 72 20 66 69 6c 65 73 20 6c 69 6b 65 20 70 68 6f 74 6f 73 2c 20 64 61 74 61 62 61 73 65 2c 20 64 6f 63 75 6d 65 6e 74 73 20 61 6e 64 20 6f 74 68 65 72 20 69 6d 70 6f 72 74 61 74 6e 74 20 61 72 65 20 65 6e 63 72 79 70 74 65 64 20 77 69 74 68 20 73 74 72 6f 6e 67 65 73 74 20 65 6e 63 72 79 70 74 69 6f 6e 20 61 6e 64 20 75 6e 69 71 75 65 20 6b 65 79 } 		$a_81_2 = {54 68 69 73 20 73 6f 66 74 77 61 72 65 20 77 69 6c 6c 20 64 65 63 72 79 70 74 20 61 6c 6c 20 79 6f 75 72 20 65 6e 63 72 79 70 74 65 64 20 66 69 6c 65 73 } 		$a_81_3 = {77 65 20 63 61 6e 20 64 65 63 72 79 70 74 20 6f 6e 6c 79 20 31 20 66 69 6c 65 20 66 72 65 65 } 		$a_81_4 = {50 72 69 63 65 20 6f 66 20 70 72 69 76 61 74 65 20 6b 65 79 20 61 6e 64 20 64 65 63 72 79 70 74 20 73 6f 66 74 77 61 72 65 20 69 73 20 37 38 30 30 24 } 		$a_81_5 = {59 6f 75 72 20 50 65 72 73 6f 6e 61 6c 20 49 44 3a } 		$a_81_6 = {53 45 4c 45 43 54 20 2a 20 46 52 4f 4d 20 57 69 6e 33 32 5f 4f 70 65 72 61 74 69 6e 67 53 79 73 74 65 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+(#a_81_6  & 1)*1) >=7
 
}

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

eaf66537-b737-47fc-8509-81e7c2bab97d

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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 ]]

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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 ]]

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

[[ currentRule.title ]]

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