TrojanDownloader_O97M_Obfuse_IS_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.IS!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 03 00 00

rule TrojanDownloader_O97M_Obfuse_IS_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.IS!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 03 00 00 "
		
	strings :
		$a_01_0 = {3d 20 22 63 6d 64 20 2f 63 20 6d 53 69 65 5e 78 5e 45 43 20 22 20 26 20 43 68 72 28 32 36 31 20 2d 20 32 31 34 29 20 26 20 43 68 72 28 34 31 34 20 2d 20 33 30 39 29 20 26 20 43 68 72 28 31 33 37 20 2d 20 31 30 35 29 20 26 20 43 68 72 28 34 35 36 20 2d 20 33 35 32 29 20 26 20 43 68 72 28 34 33 34 20 2d 20 33 31 38 29 20 26 20 43 68 72 28 33 35 38 20 2d 20 32 34 32 29 20 26 20 43 68 72 28 34 31 32 20 2d 20 33 30 30 29 20 26 20 43 68 72 28 32 38 33 20 2d 20 32 32 35 29 20 26 } 		$a_01_1 = {3d 20 22 57 53 43 52 69 70 74 2e 73 48 45 4c 6c 22 } 		$a_01_2 = {2e 52 75 6e } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1) >=3
 
}

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

8a063109-99d7-48a6-83bd-17b96e4e711b

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion