Finally I found: 4277075694 (0xFEEEFEEE) comes from Windows NT's heap manager. When a memory released, it is set to 0xFEEEFEEE.
Here are other magic numbers:
0xBAADF00D : 3131961357
0xFDFDFDFD : 4261281277
0xCDCDCDCD : 3452816845
0xDDDDDDDD : 3722304989
0xFEEEFEEE : 4277075694
Here is good instruction: Win32 Debug CRT Heap Internals