TrojanDownloader_Win32_Dyfuca_AB

YARA detection rule by roadwy

TrojanDownloader:Win32/Dyfuca.AB,SIGNATURE_TYPE_PEHSTR,fffffffa 00 fffffffa 00 09 00 00

rule TrojanDownloader_Win32_Dyfuca_AB{
	meta:
		description = "TrojanDownloader:Win32/Dyfuca.AB,SIGNATURE_TYPE_PEHSTR,fffffffa 00 fffffffa 00 09 00 00 "
		
	strings :
		$a_01_0 = {68 74 74 70 3a 2f 2f 77 77 77 2e 69 6e 74 65 72 6e 65 74 2d 6f 70 74 69 6d 69 7a 65 72 2e 63 6f 6d 2f 63 6f 6e 66 2f 78 6d 6c 2f } 		$a_01_1 = {68 74 74 70 3a 2f 2f 63 64 6e 2e 6d 6f 76 69 65 73 2d 65 74 63 2e 63 6f 6d 2f 69 6f 2f 6c 65 67 61 6c 2f 45 55 4c 41 2f 45 55 4c 41 2e 63 74 78 74 } 		$a_01_2 = {43 3a 5c 49 6e 74 65 72 6e 65 74 20 4f 70 74 69 6d 69 7a 65 72 } 		$a_01_3 = {43 3a 5c 50 72 6f 67 72 61 6d 20 46 69 6c 65 73 5c 49 6e 74 65 72 6e 65 74 20 4f 70 74 69 6d 69 7a 65 72 } 		$a_01_4 = {43 3a 5c 50 72 6f 67 72 61 6d 20 46 69 6c 65 73 5c 44 79 46 75 43 41 } 		$a_01_5 = {53 6f 66 74 77 61 72 65 5c 41 76 65 6e 75 65 20 4d 65 64 69 61 5c 49 6e 74 65 72 6e 65 74 20 4f 70 74 69 6d 69 7a 65 72 } 		$a_01_6 = {53 4f 46 54 57 41 52 45 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 50 6f 6c 69 63 69 65 73 5c 41 4d 65 4f 70 74 } 		$a_01_7 = {53 4f 46 54 57 41 52 45 5c 50 6f 6c 69 63 69 65 73 5c 41 76 65 6e 75 65 20 4d 65 64 69 61 } 		$a_01_8 = {76 65 72 3d 25 73 26 72 69 64 3d 25 73 26 63 6c 73 3d 25 73 } 	condition:
		((#a_01_0  & 1)*100+(#a_01_1  & 1)*100+(#a_01_2  & 1)*25+(#a_01_3  & 1)*25+(#a_01_4  & 1)*25+(#a_01_5  & 1)*25+(#a_01_6  & 1)*25+(#a_01_7  & 1)*25+(#a_01_8  & 1)*25) >=250
 
}

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

aae8a288-c0de-49c2-ba48-f9a469851b43

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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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