TrojanDownloader_O97M_Donoff_BK

YARA detection rule by roadwy

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

rule TrojanDownloader_O97M_Donoff_BK{
	meta:
		description = "TrojanDownloader:O97M/Donoff.BK,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_02_0 = {50 72 69 76 61 74 65 20 46 75 6e 63 74 69 6f 6e 20 6f 52 73 45 72 53 33 6e 28 29 20 41 73 20 49 6e 74 65 67 65 72 90 0c 03 00 6f 52 73 45 72 53 33 6e 20 3d 20 31 35 30 20 2b 20 34 33 20 2b 20 31 20 2b 20 36 90 0c 03 00 45 6e 64 20 46 75 6e 63 74 69 6f 6e } 		$a_02_1 = {65 33 37 6a 31 75 47 76 41 4f 3a 90 0c 03 00 47 32 58 6c 51 4d 61 20 3d 20 28 57 6d 4f 6e 48 66 20 2d 20 68 68 4e 37 45 36 61 49 29 20 2f 20 59 63 51 63 47 41 36 75 49 7a 31 35 55 28 47 52 6c 4f 56 61 68 39 4a 29 90 0c 03 00 4c 38 66 52 6c 77 45 68 77 53 54 49 5a 37 } 		$a_02_2 = {65 33 37 6a 31 75 47 76 41 4f 3a 90 0c 03 00 77 56 70 74 4f 6c 20 3d 20 73 56 71 56 30 52 39 6d 59 20 26 20 70 35 49 77 72 52 55 4a 57 62 44 34 58 90 0c 03 00 45 6e 64 20 46 75 6e 63 74 69 6f 6e } 		$a_00_3 = {6e 39 4d 66 76 50 36 6a 20 3d 20 4e 75 62 77 31 63 51 57 64 4e 54 69 59 69 20 2d 20 28 28 4e 75 62 77 31 63 51 57 64 4e 54 69 59 69 20 5c 20 6c 63 69 47 41 34 44 74 63 4d 4f 59 47 35 29 20 2a 20 6c 63 69 47 41 34 44 74 63 4d 4f 59 47 35 29 } 	condition:
		((#a_02_0  & 1)*1+(#a_02_1  & 1)*1+(#a_02_2  & 1)*1+(#a_00_3  & 1)*1) >=4
 
}

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

34f0f9f1-d337-4efa-85ec-4ba6ed117c88

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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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