TrojanDownloader_O97M_Obfusmacro

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfusmacro,SIGNATURE_TYPE_MACROHSTR_EXT,06 00 06 00 08 00 00

rule TrojanDownloader_O97M_Obfusmacro{
	meta:
		description = "TrojanDownloader:O97M/Obfusmacro,SIGNATURE_TYPE_MACROHSTR_EXT,06 00 06 00 08 00 00 "
		
	strings :
		$a_02_0 = {45 6e 76 69 72 6f 6e 28 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 2c 20 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 29 29 20 26 20 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 2c 20 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 29 } 		$a_02_1 = {49 66 20 4c 65 6e 28 22 [0-20] 22 29 20 3d 20 4c 65 6e 28 22 [0-20] 22 29 20 54 68 65 6e } 		$a_02_2 = {49 66 20 4c 65 6e 28 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 2c 20 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 29 29 20 3d 20 4c 65 6e 28 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 2c 20 48 65 78 74 6f 73 74 72 69 6e 67 28 22 [0-20] 22 29 29 29 20 54 68 65 6e } 		$a_00_3 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 } 		$a_00_4 = {46 75 6e 63 74 69 6f 6e 20 58 4f 52 49 } 		$a_00_5 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 58 4f 52 49 28 48 65 78 74 6f 73 74 72 69 6e 67 28 } 		$a_00_6 = {2e 72 65 73 70 6f 6e 73 65 42 6f 64 79 } 		$a_00_7 = {58 4f 52 49 20 3d 20 58 4f 52 49 20 26 20 43 68 72 28 41 73 63 28 4d 69 64 28 } 	condition:
		((#a_02_0  & 1)*1+(#a_02_1  & 1)*1+(#a_02_2  & 1)*1+(#a_00_3  & 1)*1+(#a_00_4  & 1)*1+(#a_00_5  & 1)*1+(#a_00_6  & 1)*1+(#a_00_7  & 1)*1) >=6
 
}

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

cb0862d4-a1a0-4562-87da-bdeb7a83e575

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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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