Aurelien Chalot
Abusing Windows’ tokens to compromise Active Directory without touching LSASS
During an internal assessment, I performed an NTLM relay and ended up owning the NT AUTHORITY\SYSTEM account of the Windows server. Looking at the users connected on the same server, I knew that a domain administrator account was connected. All I had to do to compromise the domain, was compromise the account. This could be achieved by dumping the memory of the LSASS process and collecting their credentials or Kerberos TGT’s. Seemed easy until I realised an EDR was installed on the system. Long story short, I ended up compromising the domain admin account without touching the LSASS process. To do so, I relied on an internal Windows mechanism called token manipulation.
Building an offensive RPC interface
Using the Windows Remote Procedure Call (RPC) interface is an interesting concept when conssidering the fact that it allows you to call functions, over the network in a remote process. I wanted to better understand how RPC worked, and decided to build my own RPC interface to help with that. As a result, I wrote an RPC interface that will spawn a reverse shell given an IP address and a port. In this post I’ll show you how to do just that and what I learnt in a few sections:
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