TrojanDownloader_O97M_Donoff_194

YARA detection rule by roadwy

TrojanDownloader:O97M/Donoff,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDownloader_O97M_Donoff_194{
	meta:
		description = "TrojanDownloader:O97M/Donoff,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 20 3d 20 28 48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 20 2b 20 59 64 66 68 55 79 51 28 57 61 32 30 45 66 78 63 29 20 2b 20 4d 51 69 37 4a 79 73 52 37 59 51 53 6f 34 28 57 61 32 30 45 66 78 63 20 4d 6f 64 20 4c 65 6e 28 55 38 6b 71 72 4b 41 72 33 64 74 59 76 29 29 29 20 4d 6f 64 20 32 35 36 } 		$a_01_1 = {48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 20 3d 20 28 48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 20 2b 20 31 29 20 4d 6f 64 20 32 35 36 } 		$a_01_2 = {4c 38 53 4b 72 53 34 41 54 52 6c 4a 20 3d 20 28 4c 38 53 4b 72 53 34 41 54 52 6c 4a 20 2b 20 59 64 66 68 55 79 51 28 48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 29 29 20 4d 6f 64 20 32 35 36 } 		$a_01_3 = {48 6e 50 32 4c 6e 57 52 6e 28 57 61 32 30 45 66 78 63 29 20 3d 20 48 6e 50 32 4c 6e 57 52 6e 28 57 61 32 30 45 66 78 63 29 20 58 6f 72 20 28 59 64 66 68 55 79 51 28 28 59 64 66 68 55 79 51 28 48 63 58 50 37 6d 6b 39 56 4d 31 53 4d 68 29 20 2b 20 59 64 66 68 55 79 51 28 4c 38 53 4b 72 53 34 41 54 52 6c 4a 29 29 20 4d 6f 64 20 32 35 36 29 29 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1) >=4
 
}

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

8b1362a2-4da2-4fb2-bcd0-3aab1a605832

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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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