TrojanDownloader_WinNT_OpenStream_gen_A_2

YARA detection rule by roadwy

TrojanDownloader:WinNT/OpenStream.gen!A,SIGNATURE_TYPE_JAVAHSTR_EXT,04 00 04 00 04 00 00

rule TrojanDownloader_WinNT_OpenStream_gen_A_2{
	meta:
		description = "TrojanDownloader:WinNT/OpenStream.gen!A,SIGNATURE_TYPE_JAVAHSTR_EXT,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {06 61 70 70 65 6e 64 01 00 2d 28 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 29 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 42 75 69 6c 64 65 72 3b 01 00 08 74 6f 53 74 72 69 6e 67 01 } 		$a_01_1 = {0e 6f 70 65 6e 43 6f 6e 6e 65 63 74 69 6f 6e 01 00 1a 28 29 4c 6a 61 76 61 2f 6e 65 74 2f 55 52 4c 43 6f 6e 6e 65 63 74 69 6f 6e 3b 01 00 0e 67 65 74 49 6e 70 75 74 53 74 72 65 61 6d 01 00 17 28 29 4c 6a 61 76 61 2f 69 6f 2f 49 6e 70 75 74 53 74 72 65 61 6d 3b 01 00 04 72 65 61 64 01 00 07 28 5b 42 49 49 29 49 01 00 05 77 72 69 74 65 01 00 07 28 5b 42 49 49 29 56 01 00 05 63 6c 6f 73 65 01 } 		$a_01_2 = {11 6a 61 76 61 2f 6c 61 6e 67 2f 52 75 6e 74 69 6d 65 01 00 0a 67 65 74 52 75 6e 74 69 6d 65 01 00 15 28 29 4c 6a 61 76 61 2f 6c 61 6e 67 2f 52 75 6e 74 69 6d 65 3b 01 00 04 65 78 65 63 01 } 		$a_03_3 = {11 04 00 bc 08 3a ?? 19 ?? 19 ?? 03 19 ?? be b6 00 ?? 59 36 ?? 02 9f 00 ?? (2d|19 ?? 19 ??) 03 15 ?? b6 00 ?? a7 ff } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1) >=4
 
}

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

3c2d17fa-85db-4be7-a5fe-1dbbcc56135a

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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 ]]

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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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