TrojanDownloader_O97M_Obfuse_SI_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.SI!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Obfuse_SI_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.SI!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 27 4d 73 67 42 6f 78 } 		$a_01_1 = {2e 45 78 65 63 20 28 53 74 72 52 65 76 65 72 73 65 28 53 74 72 29 29 } 		$a_01_2 = {57 6f 72 6b 73 68 65 65 74 73 28 31 29 2e 41 63 74 69 76 61 74 65 } 		$a_03_3 = {3d 20 53 74 72 52 65 76 65 72 73 65 28 52 61 6e 67 65 28 22 [0-02] 22 29 2e 43 6f 6d 6d 65 6e 74 2e 54 65 78 74 29 } 		$a_03_4 = {3d 20 4a 6f 69 6e 28 [0-02] 2c 20 22 22 29 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1+(#a_03_4  & 1)*1) >=5
 
}

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

f23726d7-e6fc-419a-83c0-48930947551c

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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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