export_JACK.py

import pefile

file ="filename"
pe = pefile.PE(file)
jack_entry = None

for entry in pe.DIRECTORY_ENTRY_RESOURCE.entries:
	if str(entry.name) == "ASSEMBLY_LZMA":
		jack_entry = entry

for entry in jack_entry.directory.entries:
	if str(entry.name) == "JACK":
		data_rva = entry.directory.entries[0].data.struct.OffsetToData
		size = entry.directory.entries[0].data.struct.Size
		data = pe.get_memory_mapped_image()[data_rva:data_rva+size]
		with open("JACK","wb") as f:
			f.write(data)