TrojanDownloader_O97M_Obfuse_FA

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.FA,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 09 00 00

rule TrojanDownloader_O97M_Obfuse_FA{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.FA,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 09 00 00 "
		
	strings :
		$a_03_0 = {2e 43 72 65 61 74 65 [0-01] [0-20] 2c 20 [0-25] 2c 20 } 		$a_01_1 = {3d 20 22 6d 74 73 3a 57 69 6e 33 32 5f 50 72 6f 63 65 73 22 } 		$a_01_2 = {3d 20 22 6d 74 73 22 20 2b 20 22 3a 57 69 6e 33 32 5f 50 72 6f 63 65 73 22 } 		$a_01_3 = {2b 20 22 3a 57 69 6e 33 32 22 20 2b 20 22 5f 50 72 6f 63 65 73 22 } 		$a_01_4 = {2b 20 22 6d 67 6d 74 73 3a 57 69 6e 33 32 5f 50 72 6f 63 65 73 73 22 } 		$a_01_5 = {2b 20 22 6d 67 6d 74 73 3a 57 69 6e 22 20 2b 20 22 33 32 5f 50 72 6f 63 65 73 73 22 } 		$a_01_6 = {2b 20 22 6d 74 73 3a 57 69 6e 33 32 5f 50 72 6f 63 65 73 73 22 } 		$a_01_7 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 28 22 77 69 6e 6d 67 22 20 5f } 		$a_03_8 = {53 68 6f 77 57 69 6e 64 6f 77 20 3d 20 [0-14] 20 } 	condition:
		((#a_03_0  & 1)*2+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_03_8  & 1)*1) >=4
 
}

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

e8eede8e-8165-487e-9a55-a65d165c2297

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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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