TrojanDownloader_O97M_Ursnif_BKE_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Ursnif.BKE!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,08 00 08 00 08 00 00

rule TrojanDownloader_O97M_Ursnif_BKE_MTB{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.BKE!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,08 00 08 00 08 00 00 "
		
	strings :
		$a_01_0 = {2e 4f 70 65 6e 20 22 47 45 54 22 2c 20 22 68 74 74 70 3a 2f 2f 22 20 26 20 4c 69 73 74 42 6f 78 31 2e 4c 69 73 74 28 33 29 2c 20 46 61 6c 73 65 } 		$a_03_1 = {2e 53 61 76 65 54 6f 46 69 6c 65 20 28 22 43 3a 5c 75 73 65 72 73 5c 70 75 62 6c 69 63 5c [0-08] 2e [0-03] 22 29 } 		$a_03_2 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 4c 69 73 74 42 6f 78 31 2e 4c 69 73 74 28 34 29 29 2e 52 75 6e 20 28 [0-14] 20 2b 20 22 43 3a 5c 75 73 65 72 73 5c 70 75 62 6c 69 63 5c [0-08] 2e [0-03] 22 29 } 		$a_03_3 = {4c 69 73 74 42 6f 78 31 2e 41 64 64 49 74 65 6d 20 28 22 [0-08] 2e 63 61 73 61 2f 73 74 61 74 69 73 31 63 2e 64 6c 6c 22 29 } 		$a_01_4 = {4c 69 73 74 42 6f 78 31 2e 41 64 64 49 74 65 6d 20 28 22 72 65 67 73 76 72 33 32 20 22 29 } 		$a_01_5 = {4c 69 73 74 42 6f 78 31 2e 41 64 64 49 74 65 6d 20 28 22 57 53 63 72 69 70 74 2e 53 68 65 6c 6c 22 29 } 		$a_01_6 = {41 70 70 6c 69 63 61 74 69 6f 6e 2e 52 75 6e 20 22 44 65 66 22 } 		$a_03_7 = {53 75 62 20 44 65 66 28 29 90 0c 02 00 55 73 65 72 46 6f 72 6d 31 2e 43 6f 6d 6d 61 6e 64 42 75 74 74 6f 6e 32 5f 43 6c 69 63 6b 90 0c 02 00 45 6e 64 20 53 75 62 } 	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+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_03_7  & 1)*1) >=8
 
}

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

826d397b-62de-4d48-84fd-93061bae3614

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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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