Trojan_O97M_Downloader_BP_MSR

YARA detection rule by roadwy

Trojan:O97M/Downloader.BP!MSR,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule Trojan_O97M_Downloader_BP_MSR{
	meta:
		description = "Trojan:O97M/Downloader.BP!MSR,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {73 63 72 69 70 74 55 72 6c 20 3d 20 22 68 74 74 70 73 3a 2f 2f 63 6c 6f 75 64 2d 73 74 6f 72 61 67 65 2e 61 72 74 2f 64 6f 63 2f 59 31 2e 70 73 31 22 } 		$a_01_1 = {74 65 6d 70 44 69 72 20 3d 20 22 43 3a 5c 54 65 6d 70 22 } 		$a_01_2 = {73 63 72 69 70 74 50 61 74 68 20 3d 20 74 65 6d 70 44 69 72 20 26 20 22 5c 59 31 2e 70 73 31 22 } 		$a_01_3 = {73 68 65 6c 6c 2e 52 75 6e 20 22 50 6f 77 65 72 53 68 65 6c 6c 20 2d 4e 6f 50 72 6f 66 69 6c 65 20 2d 45 78 65 63 75 74 69 6f 6e 50 6f 6c 69 63 79 20 52 65 6d 6f 74 65 53 69 67 6e 65 64 20 2d 46 69 6c 65 20 22 22 22 20 26 20 73 63 72 69 70 74 50 61 74 68 20 26 20 22 22 22 22 2c 20 30 2c 20 54 72 75 65 } 	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 ]]

839a800f-c46a-42d6-930c-b20df1155766

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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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