TrojanDownloader_O97M_Ursnif_AO_MTB

YARA detection rule by roadwy

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

rule TrojanDownloader_O97M_Ursnif_AO_MTB{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.AO!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_03_0 = {26 20 22 5c [0-15] 2e 78 73 6c 22 2c 20 31 29 } 		$a_01_1 = {22 62 69 6e 2e 62 61 73 65 36 34 22 } 		$a_01_2 = {23 49 66 20 56 42 41 37 20 54 68 65 6e } 		$a_01_3 = {50 72 69 76 61 74 65 20 44 65 63 6c 61 72 65 20 50 74 72 53 61 66 65 20 46 75 6e 63 74 69 6f 6e 20 53 68 65 6c 6c 45 78 65 63 75 74 65 20 4c 69 62 20 22 73 68 65 6c 6c 33 32 2e 64 6c 6c 22 } 		$a_01_4 = {2e 54 65 78 74 } 	condition:
		((#a_03_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1) >=5
 
}

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

e3e8d81e-8691-4b33-9db5-30b931a51901

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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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