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Attempt to fix/hook iphlpapi GetTcpTable()

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alexey.min
2012-02-13 13:31:46 +00:00
parent 11a5bfd4b4
commit 9fe62a4274
6 changed files with 65 additions and 0 deletions
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32
l2detect/net_hook_iphlp.cpp Normal file
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#include "stdafx.h"
#include "net_hook.h"
#include "Logger.h"
#include "ConfigIni.h"
#define INSTR_INT3 0xCC
void Hook_GetTcpTable()
{
DWORD oldProtect = 0;
HANDLE hCurProc = GetCurrentProcess();
HMODULE hIP = GetModuleHandleW( L"iphlpapi.dll" );
if( !hIP )
{
log_error( LOG_ERROR, "Hook_GetTcpTable(): iphlpapi.dll not loaded\n" );
return;
}
unsigned char *addr = (unsigned char *)GetProcAddress( hIP, "GetTcpTable" );
if( addr )
{
log_error( LOG_DEBUG, "Hook_GetTcpTable(): INT3 on iphlpapi.dll!GetTcpTable() (addr = 0x%08X)\n", (unsigned)addr );
Call_VirtualProtectEx( hCurProc, addr, 1, PAGE_READWRITE, &oldProtect );
addr[0] = INSTR_INT3;
}
addr = (unsigned char *)GetProcAddress( hIP, "GetTcpTable2" );
if( addr )
{
log_error( LOG_DEBUG, "Hook_GetTcpTable(): INT3 on iphlpapi.dll!GetTcpTable2() (addr = 0x%08X)\n", (unsigned)addr );
Call_VirtualProtectEx( hCurProc, addr, 1, PAGE_READWRITE, &oldProtect );
addr[0] = INSTR_INT3;
}
}