SIGNATURE_BASE_MAL_APT_NK_Andariel_Lilithrat_Variant

rule SIGNATURE_BASE_MAL_APT_NK_Andariel_Lilithrat_Variant : FILE
{
	meta:
		description = "Detects a variant of the Lilith RAT malware family"
		author = "CISA.gov (modified by Florian Roth, Nextron Systems)"
		id = "916a289b-db7b-5f09-9d3e-589c3f09101d"
		date = "2024-07-25"
		modified = "2024-07-26"
		reference = "https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_nk_andariel_jul24.yar#L143-L178"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "3ce68908468ff85683b081842fa4faa579fbf6f7dc1a7fab5dcf7eac63d90aea"
		score = 80
		quality = 85
		tags = "FILE"

	strings:
		$lilith_1 = "Initiate a CMD session first." ascii
		$lilith_2 = "CMD is not open" ascii
		$lilith_3 = "Couldn't write command" ascii
		$lilith_4 = "Couldn't write to CMD: CMD not open" ascii
		$unique_1 = "Upload Error!" ascii
		$unique_2 = "ERROR: Downloading is already running!" ascii
		$unique_3 = "ERROR: Unable to open file:" ascii
		$unique_4 = "General error" ascii
		$unique_5 = "CMD error" ascii
		$unique_6 = "killing self" ascii

	condition:
		uint16( 0 ) == 0x5a4d and filesize < 150KB and ( all of ( $lilith_* ) or 4 of ( $unique_* ) or 1 of ( $lilith_4 , $unique_2 ) )
}