TrojanDownloader_O97M_Obfuse_LC_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.LC!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 05 00 00

rule TrojanDownloader_O97M_Obfuse_LC_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.LC!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 05 00 00 "
		
	strings :
		$a_03_0 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 [0-14] 28 22 49 75 48 33 49 75 48 33 77 49 75 48 33 69 49 75 48 33 6e 6d 67 49 75 48 33 6d 74 49 75 48 33 73 49 75 48 33 49 75 48 33 3a 49 75 48 33 57 49 75 48 33 49 75 48 33 69 49 75 48 33 6e 33 49 75 48 33 32 5f 50 49 75 48 33 72 6f 49 75 48 33 63 49 75 48 33 65 49 75 48 33 73 73 49 75 48 33 22 29 29 } 		$a_03_1 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 [0-14] 28 22 79 69 77 61 77 69 79 69 77 61 79 69 77 61 79 69 77 61 6e 6d 67 6d 79 69 77 61 74 73 79 69 77 61 79 69 77 61 3a 79 69 77 61 79 69 77 61 57 69 79 69 77 61 79 69 77 61 6e 79 69 77 61 33 79 69 77 61 32 79 69 77 61 5f 79 69 77 61 50 72 6f 79 69 77 61 63 65 79 69 77 61 73 73 79 69 77 61 79 69 77 61 22 29 29 } 		$a_03_2 = {2e 43 72 65 61 74 65 20 [0-38] 2c } 		$a_03_3 = {54 68 69 73 44 6f 63 75 6d 65 6e 74 2e [0-14] 29 20 2b } 		$a_01_4 = {2e 53 68 6f 77 57 69 6e 64 6f 77 21 20 3d } 	condition:
		((#a_03_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_2  & 1)*1+(#a_03_3  & 1)*1+(#a_01_4  & 1)*1) >=4
 
}

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

227f6056-8a9b-433e-84e6-79c3fa4a3f73

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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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