TrojanDownloader_O97M_Obfuse_SA_MSR_2

YARA detection rule by roadwy

TrojanDownloader:O97M/Obfuse.SA!MSR,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDownloader_O97M_Obfuse_SA_MSR_2{
	meta:
		description = "TrojanDownloader:O97M/Obfuse.SA!MSR,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_03_0 = {78 48 74 74 70 2e 4f 70 65 6e [0-22] 43 68 72 57 28 31 30 34 29 20 26 20 43 68 72 57 28 31 31 36 29 20 26 20 43 68 72 57 28 31 31 36 29 20 26 20 43 68 72 57 28 31 31 32 29 20 26 20 43 68 72 57 28 35 38 29 20 26 20 43 68 72 57 28 34 37 29 20 26 20 43 68 72 57 28 34 37 29 20 26 20 43 68 72 57 28 34 39 29 20 26 20 43 68 72 57 28 35 31 29 20 26 20 43 68 72 57 28 35 31 29 20 26 20 43 68 72 57 28 34 36 29 20 26 20 43 68 72 57 28 34 39 29 20 26 20 43 68 72 57 28 35 36 29 20 26 20 43 68 72 57 28 34 36 29 20 26 20 43 68 72 57 28 34 39 29 20 26 20 43 68 72 57 28 35 34 29 20 26 20 43 68 72 57 28 35 37 29 20 26 20 43 68 72 57 28 34 36 29 20 26 20 43 68 72 57 28 35 37 29 } 		$a_03_1 = {53 68 65 6c 6c 20 28 [0-32] 43 68 72 57 28 34 36 29 20 26 20 43 68 72 57 28 31 30 31 29 20 26 20 43 68 72 57 28 31 32 30 29 20 26 20 43 68 72 57 28 31 30 31 29 29 } 		$a_01_2 = {73 61 76 65 74 6f 66 69 6c 65 } 		$a_01_3 = {78 48 74 74 70 2e 53 65 6e 64 } 	condition:
		((#a_03_0  & 1)*1+(#a_03_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 ]]

969d9c32-e563-40bb-9748-981f809b92cf

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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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