TrojanDownloader_O97M_Obfuse_BM_MTB_2

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.BM!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,07 00 07 00 0f 00 00

rule TrojanDownloader_O97M_Obfuse_BM_MTB_2{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.BM!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,07 00 07 00 0f 00 00 "
		
	strings :
		$a_01_0 = {46 69 6e 64 57 69 6e 64 6f 77 45 78 41 } 		$a_01_1 = {75 73 65 72 33 32 2e 64 6c 6c } 		$a_01_2 = {43 68 72 57 28 43 4c 6e 67 28 28 4e 6f 74 } 		$a_01_3 = {44 65 62 75 67 2e 50 72 69 6e 74 } 		$a_01_4 = {3d 20 4a 6f 69 6e 28 41 72 72 61 79 28 43 68 72 28 43 4c 6e 67 } 		$a_01_5 = {3d 20 4c 65 6e 28 4a 6f 69 6e 28 41 72 72 61 79 28 5a 4f 42 59 34 38 44 64 44 37 38 6e 61 39 } 		$a_01_6 = {3d 20 4c 65 6e 28 4a 6f 69 6e 28 41 72 72 61 79 28 53 37 4a 4a 6b 66 6c 56 6c 4b 63 30 6c 39 } 		$a_01_7 = {3d 20 4c 65 6e 28 4a 6f 69 6e 28 41 72 72 61 79 28 41 61 68 7a 45 4b 7a 6d 6a 50 33 59 75 38 59 32 4a 77 45 42 54 6c 6d 44 5a 72 } 		$a_01_8 = {3d 20 4c 65 6e 28 4a 6f 69 6e 28 41 72 72 61 79 28 52 47 6b 5a 43 30 4b 79 7a 30 68 76 58 51 6c 46 77 74 7a 67 54 6b 30 4a 30 6b 38 } 		$a_01_9 = {3d 20 4c 65 6e 28 4a 6f 69 6e 28 41 72 72 61 79 28 51 72 42 46 48 32 70 46 5f 55 44 51 6b 61 44 71 5f 49 30 54 44 42 35 } 		$a_01_10 = {3d 20 4e 59 4c 30 54 61 4e 47 30 51 35 55 6e 6e 30 6d 32 39 63 41 5a 79 30 74 4e 6e 2e 5a 51 36 5a 42 63 51 79 41 65 4a 78 42 31 30 30 43 41 4f 32 42 55 } 		$a_01_11 = {3d 20 79 69 35 49 32 67 50 48 4d 55 69 43 68 4a 6e 78 5a 79 59 45 68 30 4c 49 68 6b 30 2e 4a 76 4f 50 37 51 6b 69 70 35 73 71 69 6d 67 47 4e 36 4a 36 76 } 		$a_01_12 = {3d 20 72 7a 49 6b 30 73 34 5f 44 70 35 45 36 38 2e 74 66 70 55 6e 79 6d 37 52 46 4c 58 59 48 70 71 4d 6c 35 57 68 } 		$a_01_13 = {3d 20 66 72 36 35 65 54 30 35 5f 44 54 4e 72 6f 7a 6a 5f 30 6b 4e 36 51 72 5f 59 61 61 78 53 33 2e 79 4a 44 31 64 68 36 5f 48 70 72 73 56 55 5f 66 69 62 71 63 36 65 } 		$a_01_14 = {3d 20 54 30 32 4b 33 63 6a 43 5f 50 38 68 31 72 53 5f 6c 48 6d 4d 62 53 42 2e 61 65 44 50 45 68 4c 57 5f 39 49 66 36 38 78 } 	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+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1+(#a_01_11  & 1)*1+(#a_01_12  & 1)*1+(#a_01_13  & 1)*1+(#a_01_14  & 1)*1) >=7
 
}

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

c7d56c24-9874-446a-aebf-79297600e3b6

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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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