TrojanDownloader_O97M_Obfuse_YAJ_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.YAJ!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDownloader_O97M_Obfuse_YAJ_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.YAJ!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {44 65 63 6f 64 65 42 61 73 65 36 34 28 52 61 6e 67 65 28 22 41 33 22 29 2e 56 61 6c 75 65 } 		$a_01_1 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 44 65 63 6f 64 65 42 61 73 65 36 34 28 52 61 6e 67 65 28 22 41 34 22 29 2e 56 61 6c 75 65 } 		$a_01_2 = {62 69 6e 2e 62 61 73 65 36 34 22 3a 20 2e 74 65 78 74 20 3d 20 62 36 34 } 		$a_01_3 = {46 75 6e 63 74 69 6f 6e 20 44 65 63 6f 64 65 42 61 73 65 36 34 28 62 36 34 24 29 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1) >=4
 
}

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

900e37f2-c49c-4f74-a772-a095214068f5

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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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