Ransom_MSIL_Cryptolocker_DL_MTB

YARA detection rule by roadwy

Ransom:MSIL/Cryptolocker.DL!MTB,SIGNATURE_TYPE_PEHSTR_EXT,42 00 42 00 0f 00 00

rule Ransom_MSIL_Cryptolocker_DL_MTB{
	meta:
		description = "Ransom:MSIL/Cryptolocker.DL!MTB,SIGNATURE_TYPE_PEHSTR_EXT,42 00 42 00 0f 00 00 "
		
	strings :
		$a_81_0 = {6b 68 6a 66 20 72 61 6e 73 6f 6d 77 61 72 65 } 		$a_81_1 = {57 61 6e 6e 61 53 6d 69 6c 65 } 		$a_81_2 = {4e 69 74 72 6f 52 61 6e 73 6f 6d 77 61 72 65 } 		$a_81_3 = {52 65 6e 20 4c 6f 63 6b 65 72 } 		$a_81_4 = {59 6f 75 72 20 66 69 6c 65 73 20 68 61 76 65 20 62 65 65 6e 20 65 6e 63 72 79 70 74 65 64 } 		$a_81_5 = {42 69 74 63 6f 69 6e 73 } 		$a_81_6 = {79 6f 75 72 20 44 72 69 76 65 20 68 61 76 65 20 62 65 65 6e 20 65 6e 63 72 79 70 74 65 64 } 		$a_81_7 = {44 69 73 61 62 6c 65 52 65 61 6c 74 69 6d 65 4d 6f 6e 69 74 6f 72 69 6e 67 } 		$a_81_8 = {42 69 74 63 6f 69 6e 20 50 61 79 6d 65 6e 74 20 41 64 72 65 73 73 3a } 		$a_81_9 = {44 65 63 72 79 70 74 69 6f 6e 20 4b 65 79 3a } 		$a_81_10 = {52 45 4e 5f 4c 6f 63 6b 65 72 } 		$a_81_11 = {44 69 73 61 62 6c 65 54 61 73 6b 4d 67 72 } 		$a_81_12 = {49 6e 63 6f 72 72 65 63 74 20 44 65 63 72 79 70 74 20 4b 65 79 } 		$a_81_13 = {44 65 63 72 79 70 74 69 6e 67 20 66 69 6c 65 73 } 		$a_81_14 = {52 61 6e 73 6f 6d 77 61 72 65 } 	condition:
		((#a_81_0  & 1)*50+(#a_81_1  & 1)*50+(#a_81_2  & 1)*50+(#a_81_3  & 1)*50+(#a_81_4  & 1)*10+(#a_81_5  & 1)*10+(#a_81_6  & 1)*10+(#a_81_7  & 1)*5+(#a_81_8  & 1)*5+(#a_81_9  & 1)*5+(#a_81_10  & 1)*5+(#a_81_11  & 1)*1+(#a_81_12  & 1)*1+(#a_81_13  & 1)*1+(#a_81_14  & 1)*1) >=66
 
}

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

322665ea-2f7e-4181-acd3-f0e821921959

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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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