TrojanDownloader_Win32_Spycos_N

YARA detection rule by roadwy

TrojanDownloader:Win32/Spycos.N,SIGNATURE_TYPE_PEHSTR_EXT,13 00 12 00 09 00 00

rule TrojanDownloader_Win32_Spycos_N{
	meta:
		description = "TrojanDownloader:Win32/Spycos.N,SIGNATURE_TYPE_PEHSTR_EXT,13 00 12 00 09 00 00 "
		
	strings :
		$a_01_0 = {c1 ed 11 33 dd 03 c3 03 d8 8b e8 c1 e5 09 33 c5 03 d0 03 c2 8b ea c1 ed 03 } 		$a_03_1 = {68 00 00 0a 00 6a 00 6a 00 68 ?? 00 00 00 6a ?? 6a 00 6a 00 ?? 6a 00 b9 ?? ?? ?? ?? ba ?? ?? ?? ?? b8 ?? ?? ?? ?? e8 ?? ?? ?? ?? a3 ?? ?? ?? ?? 68 ?? ?? ?? ?? (6a 64|68 ?? 00 00 00) 6a 00 a1 ?? ?? ?? ?? 50 e8 ?? ?? ?? ?? eb 0c } 		$a_01_2 = {3a 44 45 4c 42 41 54 } 		$a_01_3 = {4d 35 53 65 31 56 53 51 43 37 43 6c 2f 32 30 39 47 4a 75 4d 76 4d 36 66 70 } 		$a_01_4 = {34 73 78 58 76 4d 53 51 56 4f 53 6f 57 34 68 77 6b 7a 64 70 74 67 } 		$a_01_5 = {67 56 4e 68 43 44 33 47 6e 72 59 6a 6e 41 4b 33 58 4a 53 72 46 41 } 		$a_01_6 = {48 41 51 76 34 53 5a 52 6a 4a 75 52 55 53 78 37 73 32 4c 37 34 41 3d 3d } 		$a_01_7 = {50 46 6f 42 4c 2b 73 50 6d 4f 36 36 6a 4d 62 55 4a 55 4b 78 76 72 44 57 64 2f 33 73 6b 7a 5a 55 77 63 71 75 65 33 4c 42 4f 4f 30 74 57 6b 61 71 76 59 6a 78 48 78 73 53 57 30 44 54 42 35 68 57 66 46 79 4b 50 6f 6b 35 2f 6c 78 74 72 56 49 32 73 53 55 30 77 45 4a 6d 78 79 4f 39 51 78 6a 4e 72 63 4c 79 69 59 6b 69 44 62 55 3d } 		$a_01_8 = {78 7a 62 2b 73 4e 6f 33 52 69 75 41 62 62 56 4c 6e 4f 7a 6e 50 } 	condition:
		((#a_01_0  & 1)*9+(#a_03_1  & 1)*9+(#a_01_2  & 1)*3+(#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) >=18
 
}

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

449a3fe5-52a8-48d5-aec3-369c18689e5d

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