TrojanDownloader_O97M_Obfuse_GBST_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.GBST!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,0b 00 0b 00 0b 00 00

rule TrojanDownloader_O97M_Obfuse_GBST_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.GBST!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,0b 00 0b 00 0b 00 00 "
		
	strings :
		$a_01_0 = {2e 44 61 74 61 54 79 70 65 20 3d 20 22 62 69 6e 2e 62 61 73 65 36 34 22 } 		$a_03_1 = {3d 20 53 74 72 43 6f 6e 76 28 [0-25] 28 22 53 45 74 46 57 56 39 44 56 56 4a 53 52 55 35 55 58 31 56 54 52 56 4a 63 55 32 39 6d 64 48 64 68 63 6d 56 63 54 57 6c 6a 63 6d 39 7a 62 32 5a 30 58 45 39 6d 5a 6d 6c 6a 5a 56 77 3d 22 29 2c 20 76 62 55 6e 69 63 6f 64 65 29 } 		$a_01_2 = {28 22 58 46 64 76 63 6d 52 63 55 32 56 6a 64 58 4a 70 64 48 6c 63 51 57 4e 6a 5a 58 4e 7a 56 6b 4a 50 54 51 3d 3d 22 29 2c 20 76 62 55 6e 69 63 6f 64 65 29 } 		$a_03_3 = {43 72 65 61 74 65 4f 62 6a 65 63 74 28 22 77 73 63 72 69 70 74 2e 73 68 65 6c 6c 22 29 2e 52 65 67 57 72 69 74 65 20 [0-25] 2c 20 31 2c 20 22 52 45 47 5f 44 57 4f 52 44 22 90 0c 02 00 45 6e 64 20 53 75 62 } 		$a_01_4 = {3d 20 43 68 72 24 28 56 61 6c 28 22 26 48 22 20 26 20 4d 69 64 24 } 		$a_03_5 = {3d 20 55 73 65 72 46 6f 72 6d 31 2e 54 65 78 74 42 6f 78 31 90 0c 02 00 45 6e 64 20 46 75 6e 63 74 69 6f 6e } 		$a_01_6 = {3d 20 43 72 65 61 74 65 4f 62 6a 65 63 74 28 22 6d 73 78 6d 6c 32 2e 64 6f 6d 64 6f 63 75 6d 65 6e 74 22 29 } 		$a_01_7 = {2e 63 72 65 61 74 65 45 6c 65 6d 65 6e 74 28 22 63 6f 64 65 22 29 } 		$a_03_8 = {2e 6e 6f 64 65 54 79 70 65 64 56 61 6c 75 65 90 0c 02 00 45 6e 64 20 46 75 6e 63 74 69 6f 6e } 		$a_03_9 = {3d 20 41 70 70 6c 69 63 61 74 69 6f 6e 2e 56 65 72 73 69 6f 6e 90 0c 02 00 45 6e 64 20 46 75 6e 63 74 69 6f 6e } 		$a_01_10 = {2e 56 42 50 72 6f 6a 65 63 74 2e 56 42 43 6f 6d 70 6f 6e 65 6e 74 73 28 22 54 68 69 73 44 6f 63 75 6d 65 6e 74 22 29 2e 43 6f 64 65 4d 6f 64 75 6c 65 2e 41 64 64 46 72 6f 6d 53 74 72 69 6e 67 } 	condition:
		((#a_01_0  & 1)*1+(#a_03_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1+(#a_01_4  & 1)*1+(#a_03_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_03_8  & 1)*1+(#a_03_9  & 1)*1+(#a_01_10  & 1)*1) >=11
 
}

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

42b9583c-f6fd-48f2-a3b2-9976973d29c7

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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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