TrojanDropper_O97M_GraceWire_A_MTB

YARA detection rule by roadwy

TrojanDropper:O97M/GraceWire.A!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00

rule TrojanDropper_O97M_GraceWire_A_MTB{
	meta:
		description = "TrojanDropper:O97M/GraceWire.A!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {2b 20 22 2e 64 22 20 2b 20 22 6c 6c 22 } 		$a_03_1 = {55 73 65 72 46 6f 72 6d ?? 2e 54 65 78 74 42 6f 78 ?? 2e 54 61 67 20 ?? 20 22 5c [0-20] 22 20 2b 20 22 2e 78 6c 73 78 22 } 		$a_01_2 = {4b 69 6c 6c 41 72 72 61 79 20 5a 69 70 46 6f 6c 64 65 72 20 26 20 22 5c 6f 6c 65 22 20 2b 20 22 4f 62 6a 22 20 2b 20 22 65 63 74 2a 2e 62 69 6e 22 } 		$a_01_3 = {2e 49 74 65 6d 28 22 78 6c 5c 65 6d 62 65 64 64 69 6e 67 73 5c 6f 6c 65 4f 62 6a 65 63 74 31 } 		$a_01_4 = {2e 4e 61 6d 65 73 70 61 63 65 28 5a 69 70 46 6f 6c 64 65 72 29 2e 43 6f 70 79 48 65 72 65 } 	condition:
		((#a_01_0  & 1)*1+(#a_03_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1) >=5
 
}

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

4a6115bc-7298-4dff-8074-e1cdd2e89082

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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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