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Find YARA Matches with Ghidra
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| #Find YARA Matches | |
| #@author @c3rb3ru5d3d53c | |
| #@category YARA | |
| #@keybinding | |
| #@menupath | |
| #@toolbar | |
| import yara | |
| from dataclasses import dataclass | |
| @dataclass | |
| class YARAMatch(): | |
| offset: int = None | |
| address: object = None | |
| rule: str = None | |
| name: str = None | |
| data: bytes = None | |
| size: int = None | |
| tags:list = None | |
| class YARA(): | |
| def __init__(self, file_path): | |
| self.yarac = yara.compile(file_path) | |
| self.memory = currentProgram.getMemory() | |
| def scan(self, data): | |
| matches = self.yarac.match(data=data) | |
| for i in range(0, len(matches)): | |
| for j in range(0, len(matches[i].strings)): | |
| for k in range(0, len(matches[i].strings[j].instances)): | |
| yield YARAMatch( | |
| rule=matches[i].rule, | |
| tags=matches[i].tags, | |
| name=matches[i].strings[j].identifier, | |
| offset=matches[i].strings[j].instances[k].offset, | |
| address=self.memory.locateAddressesForFileOffset(matches[i].strings[j].instances[k].offset)[0], | |
| data=matches[i].strings[j].instances[k].matched_data, | |
| size=matches[i].strings[j].instances[k].matched_length, | |
| ) | |
| @staticmethod | |
| def get_bytes(address, size): | |
| return bytes(map(lambda b: b & 0xff, getBytes(address, size))) | |
| def get_memory(self): | |
| ranges = self.memory.getAddressRanges() | |
| return b''.join([self.get_bytes(r.getMinAddress(), r.getLength()) for r in ranges]) | |
| @staticmethod | |
| def pprint(matches): | |
| for match in matches: | |
| print(f'{match.address} {match.rule} {match.name}') | |
| y = YARA(file_path=askFile('Select YARA Signature', 'Okay').toString()) | |
| data = y.get_memory() | |
| matches = y.scan(data=data) | |
| y.pprint(matches) |
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