TrojanDownloader_Win32_Becontr_A

YARA detection rule by roadwy

TrojanDownloader:Win32/Becontr.A,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00

rule TrojanDownloader_Win32_Becontr_A{
	meta:
		description = "TrojanDownloader:Win32/Becontr.A,SIGNATURE_TYPE_PEHSTR_EXT,05 00 05 00 06 00 00 "
		
	strings :
		$a_01_0 = {62 74 73 2f 65 2f 67 2e 70 68 70 } 		$a_01_1 = {2f 62 74 73 2f 32 33 2e 70 68 70 3f } 		$a_00_2 = {5c 6e 75 52 5c 6e 6f 69 73 72 65 56 74 6e 65 72 72 75 43 5c 73 77 6f 64 6e 69 57 5c 74 66 6f 73 6f 72 63 69 4d 5c 45 52 41 57 54 46 4f 53 } 		$a_03_3 = {41 50 50 44 41 54 41 [0-20] 4a 61 76 61 2e 65 78 65 } 		$a_03_4 = {6e 76 69 64 69 61 [0-20] 72 61 64 65 6f 6e } 		$a_03_5 = {2f 62 74 73 2f 32 33 2e 70 68 70 3f 69 64 3d [0-20] 26 76 69 64 3d [0-20] 26 76 3d [0-20] 26 74 79 70 65 3d [0-20] 26 64 77 6e 6c 64 3d } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_00_2  & 1)*1+(#a_03_3  & 1)*1+(#a_03_4  & 1)*1+(#a_03_5  & 1)*1) >=5
 
}

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

203a2c59-e416-4888-8255-ee83f4200fae

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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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