Trojan_O97M_Kerdown_D

YARA detection rule by roadwy

Trojan:O97M/Kerdown.D,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 05 00 00

rule Trojan_O97M_Kerdown_D{
	meta:
		description = "Trojan:O97M/Kerdown.D,SIGNATURE_TYPE_MACROHSTR_EXT,03 00 03 00 05 00 00 "
		
	strings :
		$a_01_0 = {20 26 20 22 5c 6d 73 6f 68 74 6d 6c 2e 65 78 65 22 } 		$a_01_1 = {20 26 20 22 20 2f 2f 45 3a 76 62 73 63 72 69 70 74 20 2f 62 20 22 20 26 20 } 		$a_01_2 = {20 26 20 22 5c 6d 73 6f 68 74 6d 6c 2e 6c 6f 67 22 } 		$a_01_3 = {3d 20 22 48 4b 43 55 5c 53 6f 66 74 77 61 72 65 5c 43 6c 61 73 73 65 73 5c 43 4c 53 49 44 5c 7b 22 } 		$a_01_4 = {26 20 22 7d 5c 53 68 65 6c 6c 5c 4d 61 6e 61 67 65 5c 43 6f 6d 6d 61 6e 64 5c 22 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1) >=3
 
}

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

dde1f2bd-2b74-4e6a-a451-96e3b5bc77bc

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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 ]]

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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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