Ransom_MSIL_Kraken_B

YARA detection rule by roadwy

Ransom:MSIL/Kraken.B,SIGNATURE_TYPE_PEHSTR_EXT,05 00 04 00 05 00 00

rule Ransom_MSIL_Kraken_B{
	meta:
		description = "Ransom:MSIL/Kraken.B,SIGNATURE_TYPE_PEHSTR_EXT,05 00 04 00 05 00 00 "
		
	strings :
		$a_00_0 = {4b 00 72 00 61 00 6b 00 65 00 6e 00 2e 00 65 00 78 00 65 00 } 		$a_01_1 = {22 61 6e 74 69 5f 72 65 76 65 72 65 22 3a 74 72 75 65 2c } 		$a_01_2 = {22 65 78 74 65 6e 73 69 6f 6e 5f 62 79 70 61 73 73 22 3a 74 72 75 65 2c } 		$a_01_3 = {4b 52 41 4b 45 4e 20 45 4e 43 52 59 50 54 45 44 20 55 4e 49 51 55 45 20 4b 45 59 } 		$a_03_4 = {4e 6f 20 77 61 79 20 74 6f 20 72 65 63 6f 76 65 72 79 20 79 6f 75 72 20 66 69 6c 65 73 20 77 69 74 68 6f 75 74 [0-06] 4b 52 41 4b 45 4e 20 44 45 43 52 59 50 54 4f 52 } 	condition:
		((#a_00_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_03_4  & 1)*1) >=4
 
}

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

0ba81615-cbb9-4557-8b40-db480757a353

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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 ]]

What do these messages mean?

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

[[ currentRule.title ]]

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