Backdoor_Win32_PcClient_YX

YARA detection rule by roadwy

Backdoor:Win32/PcClient.YX,SIGNATURE_TYPE_PEHSTR_EXT,12 00 12 00 11 00 00

rule Backdoor_Win32_PcClient_YX{
	meta:
		description = "Backdoor:Win32/PcClient.YX,SIGNATURE_TYPE_PEHSTR_EXT,12 00 12 00 11 00 00 "
		
	strings :
		$a_00_0 = {25 73 5c 25 73 } 		$a_00_1 = {25 73 5c 2a 2e 2a } 		$a_00_2 = {63 6d 64 2e 65 78 65 } 		$a_00_3 = {5c 5c 2e 5c 25 73 } 		$a_00_4 = {53 4f 46 54 57 41 52 45 5c 43 6c 61 73 73 65 73 5c 48 54 54 50 5c 73 68 65 6c 6c 5c 6f 70 65 6e 5c 63 6f 6d 6d 61 6e 64 } 		$a_00_5 = {5c 5c 2e 5c 70 69 70 65 5c } 		$a_00_6 = {25 73 25 73 25 73 25 73 } 		$a_00_7 = {25 73 25 73 25 73 25 73 5c 50 61 72 61 6d 65 74 65 72 73 } 		$a_00_8 = {25 53 79 73 74 65 6d 52 6f 6f 74 25 5c 53 79 73 74 65 6d 33 32 5c } 		$a_00_9 = {25 73 20 25 73 20 25 73 } 		$a_00_10 = {5b 25 30 34 64 2d 25 30 32 64 2d 25 30 32 64 20 25 30 32 64 3a 25 30 32 64 3a 25 30 32 64 5d } 		$a_00_11 = {25 64 2e 65 78 65 } 		$a_00_12 = {25 64 2e 74 6d 70 } 		$a_00_13 = {48 6f 73 74 3a } 		$a_00_14 = {68 74 74 70 3a 2f 2f 25 73 } 		$a_00_15 = {4d 6f 7a 69 6c 6c 61 2f 34 2e 30 20 28 63 6f 6d 70 61 74 69 62 6c 65 3b 20 4d 53 49 45 20 36 2e 30 3b 20 57 69 6e 64 6f 77 73 20 4e 54 20 35 2e 32 3b 20 53 56 31 3b 20 2e 4e 45 54 20 43 4c 52 20 31 2e 31 2e 34 33 32 32 29 } 		$a_01_16 = {8d 45 fc 50 8d 85 ec dd ff ff 68 00 20 00 00 50 ff 75 08 ff 15 00 93 00 10 85 c0 74 20 39 5d fc 74 1b 8d 45 0c 53 50 8d 85 ec dd ff ff ff 75 fc 89 5d 0c 50 56 ff 15 94 91 00 10 eb c3 56 ff 15 d8 91 00 10 6a 01 5b ff 75 08 ff 15 04 93 00 10 5f 5e ff 75 f0 ff 15 04 93 00 10 } 	condition:
		((#a_00_0  & 1)*1+(#a_00_1  & 1)*1+(#a_00_2  & 1)*1+(#a_00_3  & 1)*1+(#a_00_4  & 1)*1+(#a_00_5  & 1)*1+(#a_00_6  & 1)*1+(#a_00_7  & 1)*1+(#a_00_8  & 1)*1+(#a_00_9  & 1)*1+(#a_00_10  & 1)*1+(#a_00_11  & 1)*1+(#a_00_12  & 1)*1+(#a_00_13  & 1)*1+(#a_00_14  & 1)*1+(#a_00_15  & 1)*1+(#a_01_16  & 1)*2) >=18
 
}

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

7c8c3b8e-1cf7-4e20-baa2-99d9667bc9b6

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