Backdoor_Win32_Nvgra_A

YARA detection rule by roadwy

Backdoor:Win32/Nvgra.A,SIGNATURE_TYPE_PEHSTR,08 00 08 00 08 00 00

rule Backdoor_Win32_Nvgra_A{
	meta:
		description = "Backdoor:Win32/Nvgra.A,SIGNATURE_TYPE_PEHSTR,08 00 08 00 08 00 00 "
		
	strings :
		$a_01_0 = {4d 69 63 72 6f 73 6f 66 74 20 56 69 73 75 61 6c 20 43 2b 2b 20 52 75 6e 74 69 6d 65 20 4c 69 62 72 61 72 79 } 		$a_01_1 = {73 65 72 76 31 2e 61 6c 77 61 79 73 70 72 6f 78 79 32 2e 69 6e 66 6f } 		$a_01_2 = {4e 76 47 72 61 70 68 69 63 73 49 6e 74 65 72 66 61 63 65 } 		$a_01_3 = {53 59 53 54 45 4d 5c 43 6f 6e 74 72 6f 6c 53 65 74 30 30 31 5c 53 65 72 76 69 63 65 73 5c 53 68 61 72 65 64 41 63 63 65 73 73 5c 50 61 72 61 6d 65 74 65 72 73 5c 46 69 72 65 77 61 6c 6c 50 6f 6c 69 63 79 5c 53 74 61 6e 64 61 72 64 50 72 6f 66 69 6c 65 5c 41 75 74 68 6f 72 69 7a 65 64 41 70 70 6c 69 63 61 74 69 6f 6e 73 5c 4c 69 73 74 } 		$a_01_4 = {53 59 53 54 45 4d 5c 43 6f 6e 74 72 6f 6c 53 65 74 30 30 31 5c 53 65 72 76 69 63 65 73 5c 53 68 61 72 65 64 41 63 63 65 73 73 5c 50 61 72 61 6d 65 74 65 72 73 5c 46 69 72 65 77 61 6c 6c 50 6f 6c 69 63 79 5c 53 74 61 6e 64 61 72 64 50 72 6f 66 69 6c 65 5c 47 6c 6f 62 61 6c 6c 79 4f 70 65 6e 50 6f 72 74 73 5c 4c 69 73 74 } 		$a_01_5 = {53 6f 66 74 77 61 72 65 5c 4d 69 63 72 6f 73 6f 66 74 5c 57 69 6e 64 6f 77 73 5c 43 75 72 72 65 6e 74 56 65 72 73 69 6f 6e 5c 52 75 6e } 		$a_01_6 = {53 74 61 72 74 53 65 72 76 69 63 65 41 } 		$a_01_7 = {4f 70 65 6e 53 43 4d 61 6e 61 67 65 72 41 } 	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+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1) >=8
 
}

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

b81c76cf-00ec-4fdf-8cd9-61b41c17a9ef

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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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