SEKOIA_Apt_Implant_Xdealer_Strings

rule SEKOIA_Apt_Implant_Xdealer_Strings : FILE
{
	meta:
		description = "Detects XDealer based on strings"
		author = "Sekoia.io"
		id = "06ef72ca-b4e3-493b-8e01-d34b98259c6d"
		date = "2024-03-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_implant_xdealer_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "13c0bbc933f68164b0fe1c2768148bb649b1755bed0cfbc6ed90188fab6876d5"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "unknow_PC"
		$ = "rdp-tcp#"
		$ = "Din_%s_%s_%u_"
		$ = "nslookup %s %s"
		$ = "XFByb2dyYW1EYXRhXA=="

	condition:
		uint16be( 0 ) == 0x4d5a and 3 of them and filesize < 1MB
}