TrojanDropper_O97M_GraceWire_CF_MTB

YARA detection rule by roadwy

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

rule TrojanDropper_O97M_GraceWire_CF_MTB{
	meta:
		description = "TrojanDropper:O97M/GraceWire.CF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_03_0 = {63 74 61 63 6b 50 75 70 20 3d 20 44 69 61 6c 6f 67 34 2e 54 65 78 74 42 6f 78 31 2e 54 61 67 20 2b 20 22 5c [0-08] 22 } 		$a_03_1 = {63 74 61 63 6b 50 75 70 20 3d 20 63 74 61 63 6b 50 75 70 20 2b 20 22 [0-08] 2e 78 6c 73 78 22 } 		$a_01_2 = {63 74 61 63 6b 50 6f 70 20 3d 20 64 65 72 73 68 6c 65 70 20 26 20 44 69 61 6c 6f 67 34 2e 54 65 78 74 42 6f 78 33 2e 56 61 6c 75 65 } 		$a_01_3 = {6f 66 62 6c 20 3d 20 44 69 61 6c 6f 67 34 2e 54 65 78 74 42 6f 78 33 2e 54 61 67 } 	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 ]]

88a42323-8270-4fd1-8576-19e148c904bb

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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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