TrojanDownloader_O97M_Donoff_AZ

YARA detection rule by roadwy

TrojanDownloader:O97M/Donoff.AZ,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDownloader_O97M_Donoff_AZ{
	meta:
		description = "TrojanDownloader:O97M/Donoff.AZ,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_03_0 = {3d 20 45 6e 76 69 72 6f 6e 28 43 68 72 57 28 38 34 29 20 26 20 43 68 72 57 28 36 39 29 20 2b 20 43 68 72 57 28 37 37 29 20 26 20 43 68 72 57 28 38 30 29 29 20 26 20 [0-10] 2e 54 65 78 74 42 6f 78 } 		$a_03_1 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 [0-10] 2e 54 65 78 74 42 6f 78 [0-01] 29 } 		$a_03_2 = {2e 4f 70 65 6e 20 43 68 72 57 28 37 31 29 20 26 20 43 68 72 57 28 36 39 29 20 2b 20 43 68 72 57 28 38 34 29 2c 20 [0-10] 2c 20 46 61 6c 73 65 } 		$a_03_3 = {4f 70 65 6e 20 [0-10] 20 46 6f 72 20 42 69 6e 61 72 79 20 41 63 63 65 73 73 20 57 72 69 74 65 20 41 73 20 23 } 		$a_03_4 = {20 3d 20 53 68 65 6c 6c 28 [0-10] 2c 20 76 62 48 69 64 65 29 } 	condition:
		((#a_03_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_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 ]]

549ad005-cc08-4f30-8692-b358d07523b0

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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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