Trojan_Win32_Koutodoor_E_3

YARA detection rule by roadwy

Trojan:Win32/Koutodoor.E,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00

rule Trojan_Win32_Koutodoor_E_3{
	meta:
		description = "Trojan:Win32/Koutodoor.E,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 05 00 00 "
		
	strings :
		$a_00_0 = {25 73 2f 73 74 61 72 74 2e 70 68 70 3f 69 64 3d 25 64 26 75 72 6c 3d 25 73 } 		$a_00_1 = {6b 73 77 65 62 73 68 69 65 6c 64 2e 64 6c 6c 00 73 61 66 65 6d 6f 6e 2e 64 6c 6c 00 55 72 6c 46 69 6c 74 65 72 2e 64 6c 6c 00 } 		$a_01_2 = {77 77 77 2e 25 73 2f } 		$a_02_3 = {53 6f 66 74 77 61 72 65 5c 4d 69 63 72 6f 73 6f 66 74 5c 49 6e 74 65 72 6e 65 74 20 45 78 70 6c 6f 72 65 72 5c 4d 61 69 6e [0-05] 53 74 61 72 74 20 50 61 67 65 } 		$a_03_4 = {8b 75 08 c6 06 [0-25] c6 46 01 [0-25] c6 46 02 [0-25] c6 46 03 } 	condition:
		((#a_00_0  & 1)*2+(#a_00_1  & 1)*1+(#a_01_2  & 1)*1+(#a_02_3  & 1)*1+(#a_03_4  & 1)*2) >=5
 
}

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

5eac3343-617d-4902-87d5-eedfbc6d3d24

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion