TrojanDropper_O97M_GraceWire_AC_MTB

YARA detection rule by roadwy

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

rule TrojanDropper_O97M_GraceWire_AC_MTB{
	meta:
		description = "TrojanDropper:O97M/GraceWire.AC!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_01_0 = {43 61 6c 6c 20 6c 57 2e 72 69 74 65 28 6f 75 74 66 70 2c } 		$a_01_1 = {6f 75 74 70 75 74 2e 72 61 77 22 } 		$a_01_2 = {46 4d 4f 44 5f 45 72 72 6f 2e 72 53 74 72 69 6e 67 28 72 65 73 75 6c 74 29 29 } 		$a_03_3 = {2e 53 70 65 63 69 61 6c 46 6f 6c 64 65 72 73 28 55 73 65 72 46 6f 72 6d ?? 2e 54 65 78 74 42 6f 78 ?? 2e 54 61 67 29 } 		$a_01_4 = {3d 20 4d 73 67 42 6f 78 28 22 46 4d 4f 44 20 65 72 72 6f 72 21 20 28 22 20 26 20 72 65 73 75 6c 74 20 26 20 22 29 20 22 20 26 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1+(#a_01_4  & 1)*1) >=5
 
}

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

363be194-c596-4eb2-b038-faf69a101500

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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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