TrojanDownloader_O97M_Emotet_SAF_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Emotet.SAF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Emotet_SAF_MTB{
	meta:
		description = "TrojanDownloader:O97M/Emotet.SAF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {20 3d 20 22 5d 61 6e 77 5b 33 72 6f 5d 61 6e 77 5b 33 5d 61 6e 77 5b 33 63 65 5d 61 6e 77 5b 33 73 5d 61 6e 77 5b 33 73 5d 61 6e 77 5b 33 5d 61 6e 77 5b 33 } 		$a_01_1 = {20 3d 20 22 5d 61 6e 77 5b 33 3a 77 5d 61 6e 77 5b 33 5d 61 6e 77 5b 33 69 6e 5d 61 6e 77 5b 33 33 5d 61 6e 77 5b 33 32 5d 61 6e 77 5b 33 5f 5d 61 6e 77 5b 33 } 		$a_01_2 = {20 3d 20 22 77 5d 61 6e 77 5b 33 69 6e 5d 61 6e 77 5b 33 6d 5d 61 6e 77 5b 33 67 6d 5d 61 6e 77 5b 33 74 5d 61 6e 77 5b 33 5d 61 6e 77 5b 33 } 		$a_03_3 = {20 3d 20 52 65 70 6c 61 63 65 28 [0-20] 2c 20 22 5d 61 6e 77 5b 33 22 2c 20 [0-20] 29 } 		$a_03_4 = {2e 43 72 65 61 74 65 20 [0-20] 28 [0-20] 29 2c 20 [0-20] 2c } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1+(#a_03_4  & 1)*1) >=5
 
}

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

65d6ec21-a99a-4fdf-b292-5517bafacfe8

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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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