TrojanDownloader_O97M_Obfuse_AY_MTB

YARA detection rule by roadwy

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

rule TrojanDownloader_O97M_Obfuse_AY_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.AY!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_00_0 = {43 41 4c 4c 28 22 75 72 6c 6d 6f 6e 22 2c 22 55 52 4c 44 6f 77 6e 6c 22 26 43 48 41 52 28 31 31 31 29 26 22 61 64 54 6f 46 69 6c 65 41 22 2c } 		$a_00_1 = {22 4a 4a 43 43 4a 4a 22 2c 30 2c 43 48 41 52 28 31 30 34 29 26 } 		$a_00_2 = {22 74 74 70 73 3a 2f 2f 72 65 62 72 61 6e 64 2e 6c 79 2f 69 65 6e 63 6c 69 35 31 62 61 74 22 } 		$a_00_3 = {3d 45 58 45 43 28 22 43 3a 5c 50 52 4f 47 52 41 4d 44 41 54 41 5c 61 2e 62 61 74 22 29 } 	condition:
		((#a_00_0  & 1)*1+(#a_00_1  & 1)*1+(#a_00_2  & 1)*1+(#a_00_3  & 1)*1) >=4
 
}

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

a2e697f8-4990-415f-bd83-66760da68b79

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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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