Backdoor_Win32_Small_BR_dll

YARA detection rule by roadwy

Backdoor:Win32/Small.BR!dll,SIGNATURE_TYPE_PEHSTR,20 00 20 00 15 00 00

rule Backdoor_Win32_Small_BR_dll{
	meta:
		description = "Backdoor:Win32/Small.BR!dll,SIGNATURE_TYPE_PEHSTR,20 00 20 00 15 00 00 "
		
	strings :
		$a_01_0 = {5c 4e 65 74 77 6f 72 6b 5c 43 6f 6e 6e 65 63 74 69 6f 6e 73 5c 70 62 6b 5c 72 61 73 70 68 6f 6e 65 2e 70 62 6b } 		$a_01_1 = {5b 50 72 69 6e 74 20 53 63 72 65 65 6e 5d } 		$a_01_2 = {d7 dc b4 c5 c5 cc bf d5 bc e4 ce aa 3a 25 31 30 2e 25 66 47 2c } 		$a_01_3 = {65 78 65 2e 63 76 73 65 76 61 } 		$a_01_4 = {65 78 65 2e 70 73 69 64 68 73 61 } 		$a_01_5 = {65 78 65 2e 63 63 67 76 61 } 		$a_01_6 = {65 78 65 2e 73 73 64 62 } 		$a_01_7 = {65 78 65 2e 72 65 64 69 70 73 } 		$a_01_8 = {65 78 65 2e 70 76 61 } 		$a_01_9 = {65 78 65 2e 6e 72 6b 32 33 64 6f 6e } 		$a_01_10 = {65 78 65 2e 6c 72 74 63 6f 64 69 77 65 } 		$a_01_11 = {65 78 65 2e 64 6c 65 69 68 73 63 6d } 		$a_01_12 = {65 78 65 2e 73 65 72 69 66 76 61 70 } 		$a_01_13 = {65 78 65 2e 70 70 61 63 63 } 		$a_01_14 = {65 78 65 2e 6e 6f 6d 74 6e 63 63 70 } 		$a_01_15 = {65 78 65 2e 32 33 6d 73 73 66 } 		$a_01_16 = {65 78 65 2e 74 72 61 74 73 76 61 6b } 		$a_01_17 = {65 78 65 2e 69 75 67 65 } 		$a_01_18 = {65 78 65 2e 6e 6f 6d 76 61 72 } 		$a_01_19 = {65 78 65 2e 70 78 76 72 73 76 6b } 		$a_01_20 = {65 78 65 2e 74 6e 65 67 61 64 62 } 	condition:
		((#a_01_0  & 1)*10+(#a_01_1  & 1)*10+(#a_01_2  & 1)*10+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1+(#a_01_11  & 1)*1+(#a_01_12  & 1)*1+(#a_01_13  & 1)*1+(#a_01_14  & 1)*1+(#a_01_15  & 1)*1+(#a_01_16  & 1)*1+(#a_01_17  & 1)*1+(#a_01_18  & 1)*1+(#a_01_19  & 1)*1+(#a_01_20  & 1)*1) >=32
 
}

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

36427f13-ee41-47f3-9830-f77d5aaa0127

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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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