SEKOIA_Rootkit_Win_Purplefox_360_Tct

rule SEKOIA_Rootkit_Win_Purplefox_360_Tct : FILE
{
	meta:
		description = "Detects Purple Fox payloads used during end-2021 and 2022 campaigns based on characteristics shared by TrendMicro details."
		author = "Sekoia.io"
		id = "e992d574-6a44-4bea-97e2-6d5579ce8d01"
		date = "2022-03-28"
		modified = "2024-12-19"
		reference = "https://www.trendmicro.com/en_us/research/22/c/purple-fox-uses-new-arrival-vector-and-improves-malware-arsenal.html"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/rootkit_win_purplefox_360_tct.yar#L1-L21"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "6b4ca65bc05ea1e8036140a62b94c8b75afe30a5e37cae9a5ae2a9c828cd6275"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$rar = "Rar!"
		$str0 = "svchost.txt"
		$str1 = "rundll3222.exe"
		$str2 = "ojbkcg.exe"

	condition:
		$rar at 0 and all of ( $str* ) and filesize > 800KB and filesize < 2800KB
}