Backdoor_WinNT_Frurat_A_3

YARA detection rule by roadwy

Backdoor:WinNT/Frurat.A,SIGNATURE_TYPE_JAVAHSTR_EXT,1b 00 1b 00 0c 00 00

rule Backdoor_WinNT_Frurat_A_3{
	meta:
		description = "Backdoor:WinNT/Frurat.A,SIGNATURE_TYPE_JAVAHSTR_EXT,1b 00 1b 00 0c 00 00 "
		
	strings :
		$a_01_0 = {6a 61 76 61 2f 75 74 69 6c 2f 6c 6f 67 67 69 6e 67 2f 4c 6f 67 67 65 72 } 		$a_01_1 = {6a 61 76 61 2f 69 6f 2f 46 69 6c 65 } 		$a_01_2 = {65 78 74 72 61 2f 52 65 67 69 73 74 72 79 55 74 69 6c 73 } 		$a_03_3 = {44 65 73 69 6e 73 74 61 6c 61 [0-10] 72 75 74 61 } 		$a_03_4 = {72 75 74 61 [0-10] 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 [0-10] 72 65 67 69 73 74 72 6f } 		$a_01_5 = {67 65 74 52 65 73 6f 75 72 63 65 41 73 53 74 72 65 61 6d } 		$a_01_6 = {67 65 74 52 75 6e 74 69 6d 65 } 		$a_01_7 = {67 65 74 4c 6f 67 67 65 72 } 		$a_01_8 = {73 63 68 74 61 73 6b 73 } 		$a_01_9 = {2f 64 65 6c 65 74 65 } 		$a_01_10 = {72 65 67 69 73 74 72 6f 4b 65 79 } 		$a_01_11 = {57 69 6e 64 6f 77 73 5c 43 75 72 72 65 6e 74 56 65 72 73 69 6f 6e 5c 52 75 6e } 	condition:
		((#a_01_0  & 1)*5+(#a_01_1  & 1)*5+(#a_01_2  & 1)*5+(#a_03_3  & 1)*5+(#a_03_4  & 1)*5+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1+(#a_01_11  & 1)*1) >=27
 
}

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

98c76b88-9d4b-4e6d-b4c4-eb4e571d74d0

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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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