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Pybag

Python bindings for Microsoft DbgEng

Pybag provides helper functions on top of Python bindings for Microsoft Debug Engine to facilitate Windows native debugging.

Installation

Windows:

python setup.py install

Usage example

Use Python's repl as a command shell if desired. Ctrl-c will break-in to the debugger if you are in a wait() call.

Local user debugging

from pybag import *

def handler(bp, dbg):
    print("*********** BREAK")
    return DbgEng.DEBUG_STATUS_GO

dbg = UserDbg()
dbg.create("notepad.exe")
dbg.bp("Kernel32!WriteFile", handler)
dbg.go()

Remote user debugging

from pybag import *

def handler(bp, dbg):
    print("*********** BREAK")
    return DbgEng.DEBUG_STATUS_GO

dbg = UserDbg()
d.connect("tcp:server=192.168.1.10,port=5555")
dbg.create("notepad.exe")
dbg.bp("Kernel32!WriteFile", handler)
dbg.go()

Remote kernel debugging

from pybag import *

k = KernelDbg()
k.attach("net:port=50000,key=1.2.3.4")

Release History

2.2.12
- Fix #22 - comtypes issue
2.2.11
- Fix #18 - Fix SetImplicitProcessDataOffset
- Fix #19 - Implement CreateProcess2
2.2.10
- Better search for Windbg DLLs using registry and allowing user override
2.2.9
- Add implementations of GetCurrentThreadSystemId and GetProcessIdsByIndex
2.2.8
- Fixed missing files install issue
2.2.7
- Fixed access violation when using oneshot breakpoints
- Added 'count' option to breakpoints
2.2.6
- Added support for more dbgeng calls
  - Symbol handling
  - Set / get thread contexts
- Fixed ds command
2.2.5
- Fixed be command
- Better search for Windbg install (and DLLs)
2.2.4
- Fixed lint issues
2.2.3
- Bug fix in WriteVirtual
2.2.2
- Python bindings rewritten to use comtypes
- Moved to Python 3
- Support multiple debugging uses
  - Local user debugging
  - Remote kernel debugging
  - Remote user debugging using dbgsrv