VirTool_Win32_Obfuscator_ACZ

YARA detection rule by roadwy

VirTool:Win32/Obfuscator.ACZ,SIGNATURE_TYPE_PEHSTR_EXT,64 00 04 00 05 00 00

rule VirTool_Win32_Obfuscator_ACZ{
	meta:
		description = "VirTool:Win32/Obfuscator.ACZ,SIGNATURE_TYPE_PEHSTR_EXT,64 00 04 00 05 00 00 "
		
	strings :
		$a_01_0 = {81 7d e8 33 64 7a 7a 75 15 } 		$a_03_1 = {4d 5a 00 00 74 08 8b 45 ?? e9 ?? ?? 00 00 8b ?? ?? 8b ?? 08 03 ?? 3c 89 ?? ?? 8b ?? ?? 81 ?? 50 45 00 00 74 08 8b 45 } 		$a_01_2 = {74 04 eb 18 eb 16 8b } 		$a_03_3 = {89 45 fc 83 f8 00 74 02 eb ?? ff 75 f8 ff 75 f8 ff 75 f8 ff 75 f8 8d 55 08 83 ea 10 52 e8 } 		$a_03_4 = {ff 55 0c 89 45 ?? 89 45 ?? 83 ?? ff 75 0c c7 45 ?? 00 00 00 00 e9 ?? 00 00 00 8b ?? ?? 83 ?? 00 74 19 8b ?? ?? 8b ?? e8 03 ?? 89 ?? ?? 8b ?? ?? 8b ?? e8 03 ?? 10 89 ?? ?? eb 18 } 	condition:
		((#a_01_0  & 1)*1+(#a_03_1  & 1)*1+(#a_01_2  & 1)*1+(#a_03_3  & 1)*1+(#a_03_4  & 1)*1) >=4
 
}

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

be97f785-b20b-41d5-bab9-2c1876f0b728

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