TrojanDownloader_O97M_Donoff_204

YARA detection rule by roadwy

TrojanDownloader:O97M/Donoff,SIGNATURE_TYPE_MACROHSTR_EXT,08 00 08 00 08 00 00

rule TrojanDownloader_O97M_Donoff_204{
	meta:
		description = "TrojanDownloader:O97M/Donoff,SIGNATURE_TYPE_MACROHSTR_EXT,08 00 08 00 08 00 00 "
		
	strings :
		$a_01_0 = {46 6f 72 20 58 55 62 44 58 47 4f 6b 52 4c 6f 20 3d 20 30 20 54 6f 20 4c 65 6e 28 52 76 58 46 4f 4a 79 6c 58 29 } 		$a_01_1 = {4e 4a 4b 64 62 7a 33 5a 65 20 3d 20 28 4e 4a 4b 64 62 7a 33 5a 65 20 2b 20 31 29 20 4d 6f 64 20 32 35 36 } 		$a_01_2 = {59 6f 6f 6b 67 49 39 65 7a 53 71 6a 59 57 58 20 3d 20 28 59 6f 6f 6b 67 49 39 65 7a 53 71 6a 59 57 58 20 2b 20 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 4e 4a 4b 64 62 7a 33 5a 65 29 29 20 4d 6f 64 20 32 35 36 } 		$a_01_3 = {42 38 41 6e 44 32 20 3d 20 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 4e 4a 4b 64 62 7a 33 5a 65 29 } 		$a_01_4 = {4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 4e 4a 4b 64 62 7a 33 5a 65 29 20 3d 20 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 59 6f 6f 6b 67 49 39 65 7a 53 71 6a 59 57 58 29 } 		$a_01_5 = {4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 59 6f 6f 6b 67 49 39 65 7a 53 71 6a 59 57 58 29 20 3d 20 42 38 41 6e 44 32 } 		$a_01_6 = {47 36 48 6a 36 70 49 4b 66 65 76 28 58 55 62 44 58 47 4f 6b 52 4c 6f 29 20 3d 20 47 36 48 6a 36 70 49 4b 66 65 76 28 58 55 62 44 58 47 4f 6b 52 4c 6f 29 20 58 6f 72 20 28 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 28 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 4e 4a 4b 64 62 7a 33 5a 65 29 20 2b 20 4c 66 5a 70 35 55 45 71 61 61 31 4a 73 4a 28 59 6f 6f 6b 67 49 39 65 7a 53 71 6a 59 57 58 29 29 20 4d 6f 64 20 32 35 36 29 29 } 		$a_01_7 = {4e 65 78 74 20 58 55 62 44 58 47 4f 6b 52 4c 6f } 	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+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1) >=8
 
}

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

ed91aee1-f60b-47fe-9e77-55da35d8cea8

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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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