CAPE_Formhooka

rule CAPE_Formhooka
{
	meta:
		description = "Formbook Anti-hook Bypass"
		author = "kevoreilly"
		id = "6369de74-99eb-57ae-a315-c15f22effc73"
		date = "2021-03-07"
		modified = "2026-05-15"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/analyzer/windows/data/yara/Formbook.yar#L1-L14"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "21b8101a7039cfad0e9d49cc1f055bc23a2eb4c973dcda2a81a007e452d77a6d"
		score = 75
		quality = 70
		tags = ""
		cape_options = "clear,bp0=$remap_ntdll_0,action0=setedx:ntdll,count0=1,bp1=$remap_ntdll_1,action1=setdst:ntdll,count1=1"
		packed = "9e38c0c3c516583da526016c4c6a671c53333d3d156562717db79eac63587522"
		packed = "b8e44f4a0d92297c5bb5b217c121f0d032850b38749044face2b0014e789adfb"

	strings:
		$remap_ntdll_0 = {33 56 04 8D 86 [2] 00 00 68 F0 00 00 00 50 89 56 ?? E8 [4] 8B [1-5] 6A 00 6A 04 8D 4D ?? 51 6A 07 52 56 E8 [4] 8B 45 ?? 83 C4 20 3B}
		$remap_ntdll_1 = {33 56 0C 8D 86 [2] 00 00 68 F0 00 00 00 50 89 56 ?? E8 [4] 8B [1-5] 6A 00 6A 04 8D 4D ?? 51 6A 07 52 56 E8 [4] 8B 45 ?? 83 C4 20 3B}

	condition:
		any of them
}