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MemTracer.py
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MemTracer.py
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import argparse
import os
import sys
from ctypes import *
from ctypes.wintypes import *
import win32process
import win32api
import pywintypes
import json
from collections import OrderedDict
peHeader =[ 0x4D, 0x5A, 0x90, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x0E, 0x1F, 0xBA, 0x0E, 0x00, 0xB4, 0x09, 0xCD, 0x21, 0xB8, 0x01, 0x4C, 0xCD, 0x21, 0x54, 0x68, 0x69, 0x73, 0x20, 0x70, 0x72, 0x6F, 0x67, 0x72, 0x61, 0x6D, 0x20, 0x63, 0x61, 0x6E, 0x6E, 0x6F, 0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6E, 0x20, 0x69, 0x6E, 0x20, 0x44, 0x4F, 0x53, 0x20, 0x6D, 0x6F, 0x64, 0x65 ]
MEMORY_STATES = {0x1000: "MEM_COMMIT", 0x10000: "MEM_FREE", 0x2000: "MEM_RESERVE"}
MEMORY_PROTECTIONS = {0x10: "EXECUTE", 0x20: "EXECUTE_READ", 0x40: "EXECUTE_READWRITE", 0x80: "EXECUTE_WRITECOPY", 0x01: "NOACCESS", 0x04: "READWRITE", 0x08: "WRITECOPY", 0x02: "READONLY"}
MEMORY_TYPES = {0x1000000: "MEM_IMAGE", 0x40000: "MEM_MAPPED", 0x20000: "MEM_PRIVATE"}
PROCESS_QUERY_INFORMATION = 0x0400;
PROCESS_WM_READ = 0x0010
class MEMORY_BASIC_INFORMATION32 (Structure):
_fields_ = [
("BaseAddress", c_void_p),
("AllocationBase", c_void_p),
("AllocationProtect", DWORD),
("RegionSize", c_size_t),
("State", DWORD),
("Protect", DWORD),
("Type", DWORD)
]
class MEMORY_BASIC_INFORMATION64 (Structure):
_fields_ = [
("BaseAddress", c_ulonglong),
("AllocationBase", c_ulonglong),
("AllocationProtect", DWORD),
("__alignment1", DWORD),
("RegionSize", c_ulonglong),
("State", DWORD),
("Protect", DWORD),
("Type", DWORD),
("__alignment2", DWORD)
]
class SYSTEM_INFO(Structure):
_fields_ = [("wProcessorArchitecture", WORD),
("wReserved", WORD),
("dwPageSize", DWORD),
("lpMinimumApplicationAddress", LPVOID),
("lpMaximumApplicationAddress", LPVOID),
("dwActiveProcessorMask", DWORD),
("dwNumberOfProcessors", DWORD),
("dwProcessorType", DWORD),
("dwAllocationGranularity", DWORD),
("wProcessorLevel", WORD),
("wProcessorRevision", WORD)]
class MEMORY_BASIC_INFORMATION:
def __init__ (self, MBI):
self.MBI = MBI
self.set_attributes()
def set_attributes(self):
self.BaseAddress = self.MBI.BaseAddress
self.AllocationBase = self.MBI.AllocationBase
self.AllocationProtect = MEMORY_PROTECTIONS.get(self.MBI.AllocationProtect, self.MBI.AllocationProtect)
self.RegionSize = self.MBI.RegionSize
self.State = MEMORY_STATES.get(self.MBI.State, self.MBI.State)
self.Protect = MEMORY_PROTECTIONS.get(self.MBI.Protect, self.MBI.Protect)
self.Type = MEMORY_TYPES.get(self.MBI.Type, self.MBI.Type)
self.ProtectBits = self.MBI.Protect
def ModuleScan(ModuleName):
mLst = []
pids = win32process.EnumProcesses()
for pid in pids:
if pid == 0:
continue
try:
hProc = win32api.OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_WM_READ, False, pid)
ProcName = win32process.GetModuleFileNameEx(hProc, 0)
ProcPath, ProcName = os.path.split(ProcName)
modlist = win32process.EnumProcessModules(hProc)
for i in modlist:
Mname = win32process.GetModuleFileNameEx(hProc, i)
Mpath, Mname = os.path.split(Mname)
if (Mname == ModuleName):
record = OrderedDict([
("Process Name", ProcName),
("PID:",pid),
("Process Path", ProcPath),
("Module Path", Mpath),
("Module Name", Mname)
])
mLst.append(u"{}".format(json.dumps(record)))
except pywintypes.error as err:
#print (str(err))
continue
return mLst
def ReflectiveScan():
dLst = []
si = SYSTEM_INFO()
psi = byref(si)
windll.kernel32.GetSystemInfo(psi)
min_address = si.lpMinimumApplicationAddress
max_address = si.lpMaximumApplicationAddress
lpBuffer = MEMORY_BASIC_INFORMATION64()
pids = win32process.EnumProcesses()
for pid in pids:
if pid == 0:
continue
try:
ProcHandle = win32api.OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_WM_READ, False, pid)
ProcName = win32process.GetModuleFileNameEx(ProcHandle, 0)
ProcPath, ProcName = os.path.split(ProcName)
base_address = min_address
while base_address < max_address:
windll.kernel32.VirtualQueryEx(ProcHandle.handle, LPVOID(base_address), ctypes.byref(lpBuffer), ctypes.sizeof(lpBuffer))
info = MEMORY_BASIC_INFORMATION(lpBuffer)
if (((info.Protect == "EXECUTE_READWRITE") or (info.Protect == "EXECUTE_READ") or (info.Protect == "READWRITE")) and info.State == "MEM_COMMIT" and info.Type == "MEM_MAPPED"):
_Buffer = ctypes.create_string_buffer(info.RegionSize)
windll.kernel32.ReadProcessMemory(ProcHandle.handle, LPVOID(info.BaseAddress), _Buffer, info.RegionSize,0)
if (_Buffer[:116] == bytearray(peHeader)):
newFileByteArray = bytes(_Buffer)
record = OrderedDict([
("PID:",pid),
("Process Name", ProcName),
("Process Path", ProcPath),
("Reflective DLL load", "True"),
("Base Address", info.BaseAddress),
("Size", info.RegionSize)
])
dLst.append(u"{}".format(json.dumps(record)))
with open(str(base_address)+".exe", 'wb') as f:
f.write(newFileByteArray)
next_page = info.BaseAddress + info.RegionSize
base_address = next_page
except pywintypes.error as err:
#print (str(err))
continue
return dLst
def printproc(Mlst,Dlst,mName):
if (Mlst != []):
Mout = open("ModuleScan.json","a+")
print("Creating a ModuleScan.json file to list processess that load a", mName, " module........")
for x in Mlst:
Mout.write(x+"\n")
Mout.close()
print("Done...")
if Dlst != []:
Dout = open("DLLlst.json","a+")
print("Creating a DL list.json file to list suspect processes that loaded DLL reflectively........")
for x in Dlst:
Dout.write(x+"\n")
Dout.close()
print("Done...")
def main(argv=None):
argv = sys.argv
parser = argparse.ArgumentParser()
parser.add_argument("-r", "--reflectiveScan", action="store_true",help="Looking for reflective DLL loading")
parser.add_argument("-m", "--module", action="store", help="Looking for spcefic loaded DLL")
args = parser.parse_args(argv[1:])
parser = argparse.ArgumentParser(description="Scan Memory")
mlst = []
Dlst = []
pids = win32process.EnumProcesses()
if args.module is not None:
print("Scan for Module ", args.module, ".......")
mlst = ModuleScan(args.module)
print("Done...")
if args.reflectiveScan:
print("Scan for Reflictive DLL loading ........")
Dlst = ReflectiveScan()
print("Done...")
if (not(args.reflectiveScan) and (args.module is None)):
print("No arguments were provided")
printproc(mlst, Dlst, args.module)
if __name__ == "__main__":
main(argv=sys.argv)