CAPE_Stealcstrings

rule CAPE_Stealcstrings : FILE
{
	meta:
		description = "Stealc string decryption"
		author = "kevoreilly"
		id = "087b5532-e1e7-5df9-adb2-bf758c8ba352"
		date = "2023-02-22"
		modified = "2025-09-01"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/analyzer/windows/data/yara/Stealc.yar#L15-L26"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "6d402446a979c00b6257ace9924db381d98c530b22968bd2776c66d58c7faefc"
		score = 75
		quality = 70
		tags = "FILE"
		cape_options = "bp0=$decode+17,action0=string:edx,count=0,typestring=Stealc Strings"
		packed = "d0c824e886f14b8c411940a07dc133012b9eed74901b156233ac4cac23378add"

	strings:
		$decode = {51 8B 15 [4] 52 8B 45 ?? 50 E8 [4] 83 C4 0C 6A 04 6A 00 8D 4D ?? 51 FF 15 [4] 83 C4 0C 8B 45 ?? 8B E5 5D C3}

	condition:
		uint16( 0 ) == 0x5A4D and any of them
}