TrojanDownloader_O97M_Emotet

YARA detection rule by roadwy

TrojanDownloader:O97M/Emotet,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Emotet{
	meta:
		description = "TrojanDownloader:O97M/Emotet,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_03_0 = {41 74 74 72 69 62 75 74 65 20 56 42 5f 4e 61 6d 65 20 3d 20 22 [0-10] 22 0d 0a 53 75 62 20 61 75 74 6f 6f 70 65 6e 28 29 0d 0a 4f 6e 20 45 72 72 6f 72 20 52 65 73 75 6d 65 20 4e 65 78 74 } 		$a_01_1 = {2c 20 49 4e 4b 45 44 4c 69 62 2c 20 49 6e 6b 45 64 69 74 22 } 		$a_01_2 = {2e 53 68 6f 77 57 69 6e 64 6f 77 20 3d 20 36 20 3c 20 33 } 		$a_01_3 = {22 29 29 2e 43 72 65 61 74 65 28 } 		$a_01_4 = {2e 42 6f 6f 6b 6d 61 72 6b 73 28 22 5c 50 61 67 65 22 29 2e 52 61 6e 67 65 2e 44 65 6c 65 74 65 } 	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 ]]

5fe06f6d-482f-4816-953b-0ecd361bf09b

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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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