TrojanDownloader_Win32_Chevaloi_A

YARA detection rule by roadwy

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

rule TrojanDownloader_Win32_Chevaloi_A{
	meta:
		description = "TrojanDownloader:Win32/Chevaloi.A,SIGNATURE_TYPE_PEHSTR_EXT,06 00 06 00 05 00 00 "
		
	strings :
		$a_03_0 = {5c 76 6d 63 5f 74 65 72 6d [0-10] 72 75 6e 64 6c 6c 33 32 2e 65 78 65 [0-10] 65 78 70 6c 6f 72 65 72 2e 65 78 65 } 		$a_03_1 = {4d 6f 7a 69 6c 6c 61 55 49 57 69 6e 64 6f 77 43 6c 61 73 73 [0-10] 64 6c 6c 5f 69 6e 6a 65 63 74 } 		$a_03_2 = {66 69 72 65 66 6f 78 2e 65 78 65 00 62 75 74 74 6f 6e [0-10] 22 25 73 22 20 2d 6e 65 77 2d 77 69 6e 64 6f 77 } 		$a_01_3 = {73 65 72 76 69 63 65 73 2e 65 78 65 00 00 00 00 77 69 6e 6c 6f 67 6f 6e 2e 65 78 65 } 		$a_01_4 = {68 74 74 70 3a 2f 2f 25 73 3a 25 69 25 73 } 	condition:
		((#a_03_0  & 1)*2+(#a_03_1  & 1)*2+(#a_03_2  & 1)*2+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1) >=6
 
}

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

085c5f84-fcf5-4193-b115-5fb7e169ad83

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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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