TrojanDownloader_O97M_Obfus_B_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfus.B!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 03 00 00

rule TrojanDownloader_O97M_Obfus_B_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfus.B!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 03 00 00 "
		
	strings :
		$a_03_0 = {28 22 77 73 63 72 69 70 74 20 2f 2f 6e 6f 6c 6f 67 6f 20 63 3a 5c 43 6f 6c 6f 72 66 6f 6e 74 73 33 32 5c 76 69 73 69 74 63 61 72 64 2e 76 62 73 20 [0-40] 20 63 3a 5c 43 6f 6c 6f 72 66 6f 6e 74 73 33 32 5c 73 65 63 70 69 31 35 2e 65 78 65 } 		$a_01_1 = {73 74 61 72 74 20 63 3a 5c 43 6f 6c 6f 72 66 6f 6e 74 73 33 32 5c 73 65 63 70 69 31 35 2e 65 78 65 } 		$a_01_2 = {4c 6f 61 64 53 63 72 69 70 74 56 42 53 20 47 65 74 4f 62 6a 65 63 74 28 48 61 73 68 54 61 62 6c 65 28 29 29 2c 20 22 63 3a 5c 43 6f 6c 6f 72 66 6f 6e 74 73 33 32 5c 42 34 44 39 44 30 32 31 31 39 2e 63 6d 64 22 2c 20 30 } 	condition:
		((#a_03_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 ]]

28bac472-1f99-4e75-bd70-0ba06d8e78b9

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