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WIP: Implement a Binary Ninja plugin
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from binaryninja import * | ||
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from miasm.analysis.binary import Container | ||
from miasm.analysis.machine import Machine | ||
from miasm.core.locationdb import LocationDB | ||
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from themida_unmutate.symbolic_execution import disassemble_and_simplify_functions | ||
from themida_unmutate.miasm_utils import MiasmContext | ||
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SUPPORTED_ARCHS = ["x86_64"] | ||
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def deobfuscate_at_address(bv: BinaryView, address: int) -> None: | ||
arch = str(bv.platform.arch) | ||
if arch not in SUPPORTED_ARCHS: | ||
return | ||
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binary_data = get_binary_data(bv) | ||
miasm_ctx = create_miasm_context(arch, binary_data, bv.original_base) | ||
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print("Resolving mutated's functions' addresses...") | ||
# mutated_func_addrs = unwrap_functions(args.protected_binary, [address]) | ||
mutated_func_addrs = [address] | ||
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# Disassemble mutated functions and simplify them | ||
print("Deobfuscating mutated functions...") | ||
simplified_func_asmcfgs = disassemble_and_simplify_functions(miasm_ctx, mutated_func_addrs) | ||
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print(simplified_func_asmcfgs) | ||
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# bv.update_analysis() | ||
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def get_binary_data(bv: BinaryView) -> bytearray: | ||
# Sort sections by start address | ||
sections = list(bv.sections.values()) | ||
sorted_section = sorted(sections, key=lambda s: s.start) | ||
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br = BinaryReader(bv) | ||
last_section_address = bv.original_base | ||
exe_data = bytearray() | ||
for section in sorted_section: | ||
# Pad with zeroes | ||
padding_size = section.start - last_section_address | ||
exe_data += b"\x00" * padding_size | ||
exe_data += br.read(section.length, section.start) | ||
last_section_address = section.start + section.length | ||
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return exe_data | ||
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def create_miasm_context(arch: str, binary_data: bytearray, binary_base_address: int) -> MiasmContext: | ||
loc_db = LocationDB() | ||
machine = Machine(arch) | ||
assert machine.dis_engine is not None | ||
container = Container.from_string(binary_data, loc_db, addr=binary_base_address) | ||
mdis = machine.dis_engine(container.bin_stream, loc_db=loc_db) | ||
lifter = machine.lifter(loc_db) | ||
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return MiasmContext(loc_db, container, machine, mdis, lifter) | ||
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PluginCommand.register_for_address("themida-unmutate", "Deobfuscate mutated code from this address", | ||
deobfuscate_at_address) |
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{ | ||
"pluginmetadataversion": 2, | ||
"name": "themida-unmutate-bn", | ||
"type": ["core"], | ||
"api": ["python3"], | ||
"description": "Static deobfuscator for Themida's mutation-based obfuscation, powered by Miasm.", | ||
"longdescription": "", | ||
"license": { | ||
"name": "GPL-3.0-or-later", | ||
"text": "" | ||
}, | ||
"platforms": ["Darwin", "Linux", "Windows"], | ||
"installinstructions": { | ||
"Darwin": "", | ||
"Linux": "", | ||
"Windows": "" | ||
}, | ||
"dependencies": { | ||
"pip": ["themida-unmutate"] | ||
}, | ||
"version": "0.1.0", | ||
"author": "Erwan Grelet", | ||
"minimumbinaryninjaversion": 3164 | ||
} |
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