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# Author: Nicolas VERDIER
# This file is part of memorpy.
#
# memorpy is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# memorpy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with memorpy. If not, see <http://www.gnu.org/licenses/>.
from ctypes import pointer, sizeof, windll, create_string_buffer, c_ulong, byref, GetLastError, c_bool, WinError
from .structures import *
import copy
import struct
# import utils
import platform
from .BaseProcess import BaseProcess, ProcessException
psapi = windll.psapi
kernel32 = windll.kernel32
advapi32 = windll.advapi32
IsWow64Process=None
if hasattr(kernel32,'IsWow64Process'):
IsWow64Process=kernel32.IsWow64Process
IsWow64Process.restype = c_bool
IsWow64Process.argtypes = [c_void_p, POINTER(c_bool)]
class WinProcess(BaseProcess):
def __init__(self, pid=None, name=None, debug=True):
""" Create and Open a process object from its pid or from its name """
super(WinProcess, self).__init__()
if pid:
self._open(int(pid), debug=debug)
elif name:
self._open_from_name(name, debug=debug)
else:
raise ValueError("You need to instanciate process with at least a name or a pid")
if self.is_64bit():
si = self.GetNativeSystemInfo()
self.max_addr = si.lpMaximumApplicationAddress
else:
si = self.GetSystemInfo()
self.max_addr = 2147418111
self.min_addr = si.lpMinimumApplicationAddress
def __del__(self):
self.close()
def is_64bit(self):
if not "64" in platform.machine():
return False
iswow64 = c_bool(False)
if IsWow64Process is None:
return False
if not IsWow64Process(self.h_process, byref(iswow64)):
raise WinError()
return not iswow64.value
@staticmethod
def list():
processes=[]
arr = c_ulong * 256
lpidProcess= arr()
cb = sizeof(lpidProcess)
cbNeeded = c_ulong()
hModule = c_ulong()
count = c_ulong()
modname = create_string_buffer(100)
PROCESS_QUERY_INFORMATION = 0x0400
PROCESS_VM_READ = 0x0010
psapi.EnumProcesses(byref(lpidProcess), cb, byref(cbNeeded))
nReturned = cbNeeded.value/sizeof(c_ulong())
pidProcess = [i for i in lpidProcess][:nReturned]
for pid in pidProcess:
proc={ "pid": int(pid) }
hProcess = kernel32.OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, False, pid)
if hProcess:
psapi.EnumProcessModules(hProcess, byref(hModule), sizeof(hModule), byref(count))
psapi.GetModuleBaseNameA(hProcess, hModule.value, modname, sizeof(modname))
proc["name"]=modname.value
kernel32.CloseHandle(hProcess)
processes.append(proc)
return processes
@staticmethod
def processes_from_name(processName):
processes = []
for process in WinProcess.list():
if processName == process.get("name", None) or (process.get("name","").lower().endswith(".exe") and process.get("name","")[:-4]==processName):
processes.append(process)
if len(processes) > 0:
return processes
@staticmethod
def name_from_process(dwProcessId):
process_list = WinProcess.list()
for process in process_list:
if process.pid == dwProcessId:
return process.get("name", None)
return False
def _open(self, dwProcessId, debug=False):
if debug:
ppsidOwner = DWORD()
ppsidGroup = DWORD()
ppDacl = DWORD()
ppSacl = DWORD()
ppSecurityDescriptor = SECURITY_DESCRIPTOR()
process = kernel32.OpenProcess(262144, 0, dwProcessId)
advapi32.GetSecurityInfo(kernel32.GetCurrentProcess(), 6, 0, byref(ppsidOwner), byref(ppsidGroup), byref(ppDacl), byref(ppSacl), byref(ppSecurityDescriptor))
advapi32.SetSecurityInfo(process, 6, DACL_SECURITY_INFORMATION | UNPROTECTED_DACL_SECURITY_INFORMATION, None, None, ppSecurityDescriptor.dacl, ppSecurityDescriptor.group)
kernel32.CloseHandle(process)
self.h_process = kernel32.OpenProcess(2035711, 0, dwProcessId)
if self.h_process is not None:
self.isProcessOpen = True
self.pid = dwProcessId
return True
return False
def close(self):
if self.h_process is not None:
ret = kernel32.CloseHandle(self.h_process) == 1
if ret:
self.h_process = None
self.pid = None
self.isProcessOpen = False
return ret
return False
def _open_from_name(self, processName, debug=False):
processes = self.processes_from_name(processName)
if not processes:
raise ProcessException("can't get pid from name %s" % processName)
elif len(processes)>1:
raise ValueError("There is multiple processes with name %s. Please select a process from its pid instead"%processName)
if debug:
self._open(processes[0]["pid"], debug=True)
else:
self._open(processes[0]["pid"], debug=False)
def GetSystemInfo(self):
si = SYSTEM_INFO()
kernel32.GetSystemInfo(byref(si))
return si
def GetNativeSystemInfo(self):
si = SYSTEM_INFO()
kernel32.GetNativeSystemInfo(byref(si))
return si
def VirtualQueryEx(self, lpAddress):
mbi = MEMORY_BASIC_INFORMATION()
if not VirtualQueryEx(self.h_process, lpAddress, byref(mbi), sizeof(mbi)):
raise ProcessException('Error VirtualQueryEx: 0x%08X' % lpAddress)
return mbi
def VirtualQueryEx64(self, lpAddress):
mbi = MEMORY_BASIC_INFORMATION64()
if not VirtualQueryEx64(self.h_process, lpAddress, byref(mbi), sizeof(mbi)):
raise ProcessException('Error VirtualQueryEx: 0x%08X' % lpAddress)
return mbi
def VirtualProtectEx(self, base_address, size, protection):
old_protect = c_ulong(0)
if not kernel32.VirtualProtectEx(self.h_process, base_address, size, protection, byref(old_protect)):
raise ProcessException('Error: VirtualProtectEx(%08X, %d, %08X)' % (base_address, size, protection))
return old_protect.value
def iter_region(self, start_offset=None, end_offset=None, protec=None, optimizations=None):
offset = start_offset or self.min_addr
end_offset = end_offset or self.max_addr
while True:
if offset >= end_offset:
break
mbi = self.VirtualQueryEx(offset)
offset = mbi.BaseAddress
chunk = mbi.RegionSize
protect = mbi.Protect
state = mbi.State
#print "offset: %s, chunk:%s"%(offset, chunk)
if state & MEM_FREE or state & MEM_RESERVE:
offset += chunk
continue
if protec:
if not protect & protec or protect & PAGE_NOCACHE or protect & PAGE_WRITECOMBINE or protect & PAGE_GUARD:
offset += chunk
continue
yield offset, chunk
offset += chunk
def write_bytes(self, address, data):
address = int(address)
if not self.isProcessOpen:
raise ProcessException("Can't write_bytes(%s, %s), process %s is not open" % (address, data, self.pid))
buffer = create_string_buffer(data)
sizeWriten = c_size_t(0)
bufferSize = sizeof(buffer) - 1
_address = address
_length = bufferSize + 1
try:
old_protect = self.VirtualProtectEx(_address, _length, PAGE_EXECUTE_READWRITE)
except:
pass
res = kernel32.WriteProcessMemory(self.h_process, address, buffer, bufferSize, byref(sizeWriten))
try:
self.VirtualProtectEx(_address, _length, old_protect)
except:
pass
return res
def read_bytes(self, address, bytes = 4, use_NtWow64ReadVirtualMemory64=False):
#print "reading %s bytes from addr %s"%(bytes, address)
if use_NtWow64ReadVirtualMemory64:
if NtWow64ReadVirtualMemory64 is None:
raise WindowsError("NtWow64ReadVirtualMemory64 is not available from a 64bit process")
RpM = NtWow64ReadVirtualMemory64
else:
RpM = ReadProcessMemory
address = int(address)
buffer = create_string_buffer(bytes)
bytesread = c_size_t(0)
data = b''
length = bytes
while length:
if RpM(self.h_process, address, buffer, bytes, byref(bytesread)) or (use_NtWow64ReadVirtualMemory64 and GetLastError() == 0):
if bytesread.value:
data += buffer.raw[:bytesread.value]
length -= bytesread.value
address += bytesread.value
if not len(data):
raise ProcessException('Error %s in ReadProcessMemory(%08x, %d, read=%d)' % (GetLastError(),
address,
length,
bytesread.value))
return data
else:
if GetLastError()==299: #only part of ReadProcessMemory has been done, let's return it
data += buffer.raw[:bytesread.value]
return data
raise WinError()
# data += buffer.raw[:bytesread.value]
# length -= bytesread.value
# address += bytesread.value
return data
def list_modules(self):
module_list = []
if self.pid is not None:
hModuleSnap = CreateToolhelp32Snapshot(TH32CS_CLASS.SNAPMODULE, self.pid)
if hModuleSnap is not None:
module_entry = MODULEENTRY32()
module_entry.dwSize = sizeof(module_entry)
success = Module32First(hModuleSnap, byref(module_entry))
while success:
if module_entry.th32ProcessID == self.pid:
module_list.append(copy.copy(module_entry))
success = Module32Next(hModuleSnap, byref(module_entry))
kernel32.CloseHandle(hModuleSnap)
return module_list
def get_symbolic_name(self, address):
for m in self.list_modules():
if int(m.modBaseAddr) <= int(address) < int(m.modBaseAddr + m.modBaseSize):
return '%s+0x%08X' % (m.szModule, int(address) - m.modBaseAddr)
return '0x%08X' % int(address)
def hasModule(self, module):
if module[-4:] != '.dll':
module += '.dll'
module_list = self.list_modules()
for m in module_list:
if module in m.szExePath.split('\\'):
return True
return False
def get_instruction(self, address):
"""
Pydasm disassemble utility function wrapper. Returns the pydasm decoded instruction in self.instruction.
"""
import pydasm
try:
data = self.read_bytes(int(address), 32)
except:
return 'Unable to disassemble at %08x' % address
return pydasm.get_instruction(data, pydasm.MODE_32)
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