TrojanDownloader_O97M_Ursnif_AT_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Ursnif.AT!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Ursnif_AT_MTB{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.AT!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {3d 20 43 68 72 28 31 31 35 20 2b 20 30 29 20 2b 20 22 48 45 4c 4c 2e 22 } 		$a_03_1 = {2e 43 6f 6e 74 72 6f 6c 73 28 [0-55] 29 2e 56 61 6c 75 65 } 		$a_03_2 = {4f 70 65 6e 20 54 72 69 6d 28 [0-55] 29 20 46 6f 72 20 4f 75 74 70 75 74 20 41 73 20 23 } 		$a_03_3 = {50 72 69 6e 74 20 23 ?? 2c 20 54 72 69 6d 28 } 		$a_01_4 = {43 6c 6f 73 65 20 23 } 	condition:
		((#a_01_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_2  & 1)*1+(#a_03_3  & 1)*1+(#a_01_4  & 1)*1) >=5
 
}

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

805d0d79-ea8e-42e5-882f-73be82059c22

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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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