# NetWire config dumper for Volatility # # LICENSE # Please refer to the LICENSE.txt in the https://github.com/JPCERTCC/MalConfScan/ # # Created by You Nakatsuru (@you0708) # # How to use: # 1. cd "Volatility Folder" # 2. mkdir contrib/plugins/malware # 3. mv netwirescan.py contrib/plugins/malware # 4. python vol.py --plugins=contrib/plugins/malware netwireconfig -f images.mem --profile=WinXPSP3x86 import volatility.plugins.taskmods as taskmods import volatility.win32.tasks as tasks import volatility.utils as utils import volatility.debug as debug import volatility.plugins.malware.malfind as malfind from struct import unpack import re from collections import OrderedDict NETWIRE_INFO = [{ 'version': '1.5b', 'pattern': re.compile("\xE8\x8B(.)\x00\x00\xC7\x44(.)\x08\x03\x00\x00\x00", re.DOTALL), 'cfg_offset': 17, 'cfg_size': 0x3A4, 'cfg_info': [['Unknown0', 0], ['Unknown1', 0x4], ['KeyLog Dir', 0x8], ['Active Setup', 0x8C], ['Run Key', 0xB4], ['Startup', 0xC8], ['Mutex', 0x14C], ['UUID', 0x158], ['Password', 0x180], ['Unknown2', 0x1A4], ['Host', 0x2A4]] }, { 'version': '1.5d', 'pattern': re.compile("\xE8(..)\x00\x00\x89\x1C(.)\xC7\x44\x24\x08", re.DOTALL), 'cfg_offset': 20, 'cfg_size': 0x3A8, 'cfg_info': [['Unknown0', 0], ['Unknown1', 0x4], ['Unknown2', 0x8], ['KeyLog Dir', 0xC], ['Active Setup', 0x90], ['Run Key', 0xB8], ['Startup', 0xCC], ['Mutex', 0x150], ['UUID', 0x15C], ['Password', 0x184], ['Unknown3', 0x1A8], ['Host', 0x2A8]] }, { 'version': '1.6a Final?', 'pattern': re.compile("\xE8\x87(.)\x00\x00\x89\x1C(.)\xC7\x44\x24\x08\x03", re.DOTALL), 'cfg_offset': 20, 'cfg_size': 0x3A8, 'cfg_info': [['Unknown0', 0], ['Unknown1', 0x4], ['Unknown2', 0x8], ['KeyLog Dir', 0xC], ['Active Setup', 0x90], ['Run Key', 0xB8], ['Startup', 0xCC], ['Mutex', 0x150], ['UUID', 0x15C], ['Password', 0x184], ['Unknown3', 0x1A8], ['Host', 0x2A8]] }, { 'version': '1.6a', 'pattern': re.compile("\xE8\x9F(.)\x00\x00\x89\x1C(.)\xC7\x44\x24\x08\x03", re.DOTALL), 'cfg_offset': 20, 'cfg_size': 0x3A8, 'cfg_info': [['Unknown0', 0], ['Unknown1', 0x4], ['Unknown2', 0x8], ['KeyLog Dir', 0xC], ['Active Setup', 0x90], ['Run Key', 0xB8], ['Startup', 0xCC], ['Mutex', 0x150], ['UUID', 0x15C], ['Password', 0x184], ['Unknown3', 0x1A8], ['Host', 0x2A8]] }, { 'version': '1.7a', 'pattern': re.compile("\xE8(..)\x00\x00\xC7\x44(.)\x08\xFF\x00\x00\x00", re.DOTALL), 'cfg_offset': 17, 'cfg_size': 0x3D0, 'cfg_info': [['C2', 0], ['Unknown0', 0x100], ['AES Key', 0x200], ['Host ID', 0x238], ['Mutex', 0x24C], ['Install Path', 0x260], ['Startup', 0x2E4], ['UUID', 0x300], ['KeyLog Dir', 0x340], ['Unknown1', 0x3C4], ['Unknown2', 0x3C8], ['Unknown3', 0x3CC]] }, { 'version': 'Unknown', 'pattern': re.compile("\xE8\x53(.)\x00\x00\xC7\x44(.)\x10\xFF\x00\x00\x00", re.DOTALL), 'cfg_offset': 17, 'cfg_size': 0x468, 'cfg_info': [['C2', 0], ['Unknown0', 0x100], ['AES Key', 0x200], ['Host ID', 0x238], ['Group', 0x24C], ['Mutex', 0x260], ['Install Path', 0x280], ['Startup', 0x320], ['UUID', 0x360], ['KeyLog Dir', 0x3A0], ['Unknown1', 0x424], ['Unknown2', 0x440], ['Unknown3', 0x464]] }] try: import yara has_yara = True except ImportError: has_yara = False signatures = { 'namespace1' : 'rule netwire { \ strings: \ $v1 = "HostId-%Rand%" \ $v2 = "mozsqlite3" \ $v3 = "[Scroll Lock]" \ $v4 = "GetRawInputData" \ $ping = "ping 192.0.2.2" \ $log = "[Log Started] - [%.2d/%.2d/%d %.2d:%.2d:%.2d]" \ condition: ($v1) or ($v2 and $v3 and $v4) or ($ping and $log)}' } class netwireConfig(taskmods.DllList): """Parse the NetWire configuration""" @staticmethod def is_valid_profile(profile): return (profile.metadata.get('os', 'unknown') == 'windows'), profile.metadata.get('memory_model', '32bit') def get_vad_base(self, task, address): """ Get the VAD starting address """ for vad in task.VadRoot.traverse(): if address >= vad.Start and address < vad.End: return vad.Start, vad.End # This should never really happen return None def parse_config(self, cfg_blob, nw): p_data = OrderedDict() p_data["Version"] = nw["version"] for name, offset in nw["cfg_info"]: data = cfg_blob[offset:].split("\x00")[0] p_data[name] = data return p_data def calculate(self): if not has_yara: debug.error("Yara must be installed for this plugin") addr_space = utils.load_as(self._config) os, memory_model = self.is_valid_profile(addr_space.profile) if not os: debug.error("This command does not support the selected profile.") rules = yara.compile(sources=signatures) for task in self.filter_tasks(tasks.pslist(addr_space)): scanner = malfind.VadYaraScanner(task=task, rules=rules) for hit, address in scanner.scan(): vad_base_addr, end = self.get_vad_base(task, address) proc_addr_space = task.get_process_address_space() data = proc_addr_space.zread(vad_base_addr, end - vad_base_addr) config_data = [] if len(data) < 0x10000 or len(data) > 0x200000: continue for nw in NETWIRE_INFO: m = re.search(nw["pattern"], data) if m: offset = m.start() break else: continue cfg_addr = unpack("=I", data[offset + nw["cfg_offset"]:offset + nw["cfg_offset"] + 4])[0] if cfg_addr < vad_base_addr: continue cfg_addr -= vad_base_addr cfg_blob = data[cfg_addr:cfg_addr + nw["cfg_size"]] config_data.append(self.parse_config(cfg_blob, nw)) yield task, vad_base_addr, end, hit, memory_model, config_data break def render_text(self, outfd, data): delim = '-' * 70 for task, start, end, malname, memory_model, config_data in data: outfd.write("{0}\n".format(delim)) outfd.write("Process: {0} ({1})\n\n".format(task.ImageFileName, task.UniqueProcessId)) outfd.write("[Config Info]\n") for p_data in config_data: for id, param in p_data.items(): outfd.write("{0:<16}: {1}\n".format(id, param))