TrojanDownloader_O97M_Ursnif_PDB_MTB

YARA detection rule by roadwy

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

rule TrojanDownloader_O97M_Ursnif_PDB_MTB{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.PDB!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {3d 20 45 6e 76 69 72 6f 6e 28 22 54 65 6d 70 22 29 20 26 20 22 5c 22 20 26 20 74 79 20 26 20 22 2e 22 } 		$a_01_1 = {3d 20 53 70 6c 69 74 28 52 61 6e 67 65 28 22 49 37 39 3a 49 37 39 22 29 2c 20 22 2c 22 29 } 		$a_01_2 = {3d 20 48 69 69 4a 69 69 28 22 22 20 26 20 76 53 78 65 65 44 29 3a } 		$a_01_3 = {3d 20 45 72 6a 4f 6b 69 28 44 44 2c 20 44 53 77 29 } 		$a_01_4 = {3d 20 42 6e 3a 20 41 70 70 6c 69 63 61 74 69 6f 6e 2e 51 75 69 74 } 	condition:
		((#a_01_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 ]]

c6ab000b-5ea0-4d6d-a80b-8248457dd0ea

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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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