VOLEXITY_Apt_Malware_Win_Decrok

rule VOLEXITY_Apt_Malware_Win_Decrok : INKYPINE FILE MEMORY
{
	meta:
		description = "The DECROK malware family, which uses the victim's hostname to decrypt and execute an embedded payload."
		author = "threatintel@volexity.com"
		id = "46be1793-6419-54fe-a78b-5d087e02626e"
		date = "2021-06-23"
		modified = "2023-09-28"
		reference = "https://github.com/volexity/threat-intel"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2021/2021-08-24 - InkySquid Part 2/indicators/yara.yar#L62-L90"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "6a452d088d60113f623b852f33f8f9acf0d4197af29781f889613fed38f57855"
		logic_hash = "a551700943d5abc95af00fc4fefd416ace8d59037852c6bc5caf1d6bd09afd63"
		score = 75
		quality = 80
		tags = "INKYPINE, FILE, MEMORY"
		os = "win"
		os_arch = "x86"
		scan_context = "file,memory"
		severity = "critical"
		license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
		rule_id = 5606
		version = 4

	strings:
		$v1 = {C7 ?? ?? ?? 01 23 45 67 [2-20] C7 ?? ?? ?? 89 AB CD EF C7 ?? ?? ?? FE DC BA 98}
		$av1 = "Select * From AntiVirusProduct" wide
		$av2 = "root\\SecurityCenter2" wide
		$func1 = "CreateThread"
		$format = "%02x"

	condition:
		all of them and $func1 in ( @format .. @format + 10 )
}