SEKOIA_Apt_Nobelium_Nativezone_Gen

import "pe"

rule SEKOIA_Apt_Nobelium_Nativezone_Gen : FILE
{
	meta:
		description = "Detects NativeZone used in 2022"
		author = "Sekoia.io"
		id = "e16cac97-38dd-4145-95f5-cf641940a19b"
		date = "2022-02-25"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_nobelium_nativezone_gen.yar#L3-L31"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "63ad9fc510541f98237fa5b254dc4a147539cbf485b2889d97bf3b619c3db3ae"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$rich = { 52 69 63 68 [4] 00 }
		$obs = { C7 85 [8] C7 85 }
		$nobs = { C7 85 [6] 00 00 C7 85 }

	condition:
		pe.DLL and filesize < 2500KB and pe.number_of_exports > 20 and pe.number_of_imports < 30 and ( pe.imports ( "kernel32.dll" , "VirtualAlloc" ) and pe.imports ( "kernel32.dll" , "VirtualProtect" ) ) and for any i in ( 0 .. pe.number_of_sections - 1 ) : ( pe.sections [ i ] . name == ".rdata" and pe.sections [ i ] . raw_data_size > 300000 ) and #obs > 300 and #nobs < 150 and not $rich
}