TrojanDropper_O97M_GraceWire_BM_MTB

YARA detection rule by roadwy

TrojanDropper:O97M/GraceWire.BM!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDropper_O97M_GraceWire_BM_MTB{
	meta:
		description = "TrojanDropper:O97M/GraceWire.BM!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {6f 66 62 6c 20 3d 20 22 43 41 22 20 2b 20 22 4c 4c 28 22 22 22 20 2b 20 6f 66 62 6c } 		$a_01_1 = {45 78 65 63 75 74 65 45 78 63 65 6c 34 4d 61 63 72 6f 20 6f 66 62 6c 20 26 20 22 22 22 2c 22 22 72 64 64 72 64 22 22 2c 22 22 4a 22 22 29 } 		$a_01_2 = {3d 20 63 61 72 2e 43 68 65 63 6b 43 61 72 28 41 63 74 69 76 65 48 6f 74 62 69 74 2c 20 22 22 20 26 20 4b 36 47 4f 41 4d 2e 54 65 78 74 42 6f 78 33 2e 54 61 67 20 2b 20 22 22 29 } 		$a_01_3 = {43 68 44 69 72 20 28 4b 36 47 4f 41 4d 2e 54 65 78 74 42 6f 78 31 2e 54 61 67 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 ]]

5397b515-03db-47d3-8806-fe0fe5edff18

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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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