WITHSECURELABS_Andariel_Undercrypt_Versioninfo

import "pe"

rule WITHSECURELABS_Andariel_Undercrypt_Versioninfo
{
	meta:
		description = "Detects UnderCrypt samples based on version info"
		author = "WithSecure"
		id = "03ed3929-12e9-5a8f-bdef-394396679a19"
		date = "2026-01-22"
		modified = "2026-01-22"
		reference = "https://github.com/WithSecureLabs/iocs"
		source_url = "https://github.com/WithSecureLabs/iocs/blob/1a8384468dd292c6d2c5114c32e42dc0da1f5ae1/Andariel2025/andariel.yara#L54-L67"
		license_url = "https://github.com/WithSecureLabs/iocs/blob/1a8384468dd292c6d2c5114c32e42dc0da1f5ae1/LICENSE"
		logic_hash = "2d87246f89128a97136c021653211109d44dc9c75be747e58c7d09ebdac092ed"
		score = 75
		quality = 75
		tags = ""

	condition:
		(pe.version_info [ "ProductName" ] == "Microsoft@Windows@OperatingSystem" ) or ( pe.version_info [ "InternalName" ] contains "_crypted." and pe.version_info [ "FileVersion" ] contains "10.0.19041.1" )
}