TrojanDownloader_O97M_Obfuse_VA_MTB_5

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.VA!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,0c 00 0c 00 0c 00 00

rule TrojanDownloader_O97M_Obfuse_VA_MTB_5{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.VA!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,0c 00 0c 00 0c 00 00 "
		
	strings :
		$a_00_0 = {64 6f 63 75 6d 65 6e 74 43 6f 6c 6c 65 63 74 69 6f 6e 41 72 72 61 79 20 3d 20 52 65 70 6c 61 63 65 28 66 72 6d 2e 63 62 74 6e 31 2e 43 61 70 74 69 6f 6e 2c 20 22 31 22 2c 20 22 22 29 } 		$a_00_1 = {74 65 6d 70 52 65 70 6f 2e 6c 69 62 44 6f 63 75 6d 65 6e 74 4c 69 6e 6b 20 64 6f 63 75 6d 65 6e 74 43 6f 6c 6c 65 63 74 69 6f 6e 41 72 72 61 79 2c 20 72 69 67 68 74 54 72 75 73 74 52 65 66 65 72 65 6e 63 65 } 		$a_00_2 = {53 65 74 20 6e 61 6d 65 73 70 61 63 65 52 65 6d 6f 76 65 43 6c 65 61 72 20 3d 20 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 } 		$a_00_3 = {6e 61 6d 65 73 70 61 63 65 52 65 6d 6f 76 65 43 6c 65 61 72 2e 65 78 65 63 20 52 65 70 6c 61 63 65 28 63 6f 6e 76 65 72 74 4c 6f 61 64 44 61 74 61 62 61 73 65 2c 20 22 31 22 2c 20 22 22 29 20 26 20 22 20 22 20 26 20 52 65 70 6c 61 63 65 28 70 72 6f 63 53 74 72 75 63 74 2c 20 22 31 22 2c 20 22 22 29 } 		$a_00_4 = {53 65 74 20 63 6f 6e 76 65 72 74 43 6c 65 61 72 20 3d 20 6d 65 6d 6f 72 79 50 6f 69 6e 74 65 72 44 6f 63 75 6d 65 6e 74 2e 43 72 65 61 74 65 54 65 78 74 46 69 6c 65 28 76 61 6c 75 65 57 69 6e 64 6f 77 29 } 		$a_00_5 = {63 6f 6e 76 65 72 74 43 6c 65 61 72 2e 57 72 69 74 65 4c 69 6e 65 20 64 61 74 61 56 69 65 77 } 		$a_00_6 = {4a 76 64 46 4e 69 56 6d 35 76 61 58 52 77 62 31 78 63 59 32 6c 73 59 6e 56 77 58 46 78 7a 63 6d 56 7a 64 56 78 63 4f 6d 4d 69 4b 47 56 73 61 57 5a 76 64 47 56 32 59 58 4d 75 59 32 35 31 52 6d } 		$a_00_7 = {5a 6c 55 6e 52 6a 5a 57 78 6c 63 7a 73 78 49 44 30 67 5a 58 42 35 64 43 35 6a 62 6e 56 47 5a 6d 56 53 64 47 4e 6c 62 47 56 7a 4f 32 35 6c 63 47 38 75 59 32 35 31 52 6d 5a 6c 55 6e 52 6a 5a 57 } 		$a_00_8 = {35 6c 64 57 78 68 56 6d 56 36 61 56 4e 72 62 6d 6c 73 4f 79 6c 6c 63 32 78 68 5a 69 41 73 49 6c 4e 31 64 6b 52 53 50 57 52 70 63 79 59 35 4d 58 5a 79 4d 45 52 6f 53 47 52 52 4f 45 45 30 4d 7a } 		$a_00_9 = {64 76 54 47 59 30 4e 6d 35 51 4d 58 68 30 55 48 52 61 63 6d 6c 36 5a 6d 4e 4d 57 58 6f 35 5a 31 42 4c 59 32 74 4f 4e 43 39 6b 5a 48 5a 6b 5a 69 39 74 62 32 4d 75 65 58 4a 6c 64 6d 6c 73 5a 57 } 		$a_00_10 = {44 30 67 64 32 56 70 56 6e 52 34 5a 56 52 30 65 47 56 75 49 48 4a 68 64 6a 73 70 49 6d 64 77 61 69 35 6c 5a 32 46 79 62 33 52 54 59 6c 5a 75 62 32 6c 30 63 47 39 63 58 47 4e 70 62 47 4a 31 63 } 		$a_00_11 = {74 72 28 22 69 74 65 72 61 74 6f 72 44 61 74 61 62 61 73 65 2e 73 70 6c 69 74 28 27 27 29 2e 72 65 76 65 72 73 65 28 29 2e 6a 6f 69 6e 28 27 27 29 3b 7d 6e 65 78 74 50 72 6f 63 20 3d 20 77 69 6e 64 6f 77 22 29 } 	condition:
		((#a_00_0  & 1)*1+(#a_00_1  & 1)*1+(#a_00_2  & 1)*1+(#a_00_3  & 1)*1+(#a_00_4  & 1)*1+(#a_00_5  & 1)*1+(#a_00_6  & 1)*1+(#a_00_7  & 1)*1+(#a_00_8  & 1)*1+(#a_00_9  & 1)*1+(#a_00_10  & 1)*1+(#a_00_11  & 1)*1) >=12
 
}

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

15d6abe3-5bd5-4b1c-9c79-2e7abfa510a6

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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 ]]

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Format & documentation suggestions

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[[ reason ]]

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

[[ currentRule.title ]]

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