TrojanDownloader_O97M_Obfuse_RVCH_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.RVCH!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDownloader_O97M_Obfuse_RVCH_MTB{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.RVCH!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {53 68 65 6c 6c 20 52 7a 4e 63 56 51 31 32 61 68 77 51 34 73 34 28 22 35 32 37 35 36 65 34 34 34 43 34 63 33 33 33 32 32 65 34 35 35 38 34 35 32 30 37 33 36 38 36 35 36 63 36 43 33 33 33 32 32 65 36 34 36 43 36 43 32 63 35 33 36 38 36 35 36 43 36 63 34 35 37 38 36 35 36 33 35 66 35 32 37 35 36 65 34 34 34 43 34 43 32 30 22 29 } 		$a_01_1 = {51 34 73 34 28 22 36 36 36 37 36 62 36 61 36 37 33 39 36 37 37 32 36 41 36 42 33 39 36 61 36 42 36 37 37 32 36 61 36 39 33 33 33 39 33 34 36 41 36 37 36 62 36 36 36 34 36 37 36 61 36 43 36 63 36 61 33 33 22 29 } 		$a_01_2 = {43 68 72 28 49 6e 74 28 22 26 68 22 20 26 20 4d 69 64 28 67 4a 46 56 6f 4a 4a 4f 2c 20 79 73 47 64 47 65 56 2c 20 32 29 29 29 } 		$a_01_3 = {57 6f 72 6b 62 6f 6f 4b 5f 6f 50 65 6e 28 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 ]]

b8899a30-574c-4239-86f3-3309b34fa86e

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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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