5/31/2023 0 Comments NtloaddriverUsing the LookupPrivilegeValue() function, the LUID associated with SeLoadDriverPrivilege can be retrieved and passed to NtAdjustPrivilegesToken() together with the SE_PRIVILEGE_ENABLED flag. At boot time, each privilege is assigned a locally unique identifier LUID. Luckily, changing the privileges isn’t too difficult. ![]() By default, even in elevated context, the required privilege SeLoadDriverPrivilege is disabled. The first task at hand is making sure the current process context we’re in has sufficient privileges to load or unload a driver. So I decided to first write a regular C/C++ console application which should do exactly the same, except for the intergration part with CobaltWhispers which takes care of the payload. However, writing a BOF with such complex functionality results in a lot of code and is hard to test and debug, especially when also using direct syscalls. ![]() As I mentioned in my previous blogpost, I am in dire need of a Beacon Object File to disable Driver Signature Enforcement (DSE) from memory. I never thought I would say this, but after spending so much time in kernel land, it’s almost as if developing kernel functionality is easier than writing user land applications, especially when they need to fly under the radar. ![]() ![]() When life gives you exploits, you turn them into Beacon Object Files.
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