Ransom_MSIL_CryptoLocker_DB_MTB_2

YARA detection rule by roadwy

Ransom:MSIL/CryptoLocker.DB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00

rule Ransom_MSIL_CryptoLocker_DB_MTB_2{
	meta:
		description = "Ransom:MSIL/CryptoLocker.DB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_81_0 = {49 45 46 4d 54 43 42 5a 54 31 56 53 49 45 5a 4a 54 45 56 54 49 45 68 42 56 6b 55 67 51 6b 56 46 54 69 42 46 54 6b 4e 53 57 56 42 55 52 55 51 } 		$a_81_1 = {54 6d 56 6c 5a 43 42 74 62 33 4a 6c 49 47 6c 75 5a 6d 39 79 62 57 46 30 61 57 39 75 49 47 46 69 62 33 56 30 49 45 4a 70 64 47 4e 76 61 57 34 } 		$a_81_2 = {5a 47 56 6a 63 6e 6c 77 64 46 39 7a 59 57 52 41 63 48 4a 76 64 47 39 75 62 57 46 70 62 43 35 6a 62 32 30 } 		$a_81_3 = {57 55 39 56 55 69 42 51 52 56 4a 54 54 30 35 42 54 43 42 4a 52 45 56 4f 56 45 6c 47 53 55 4e 42 56 45 6c 50 54 6a 6f 67 } 	condition:
		((#a_81_0  & 1)*1+(#a_81_1  & 1)*1+(#a_81_2  & 1)*1+(#a_81_3  & 1)*1) >=4
 
}

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

b5e811b4-9d0a-4f71-bf5c-32d6cd8e1ffa

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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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