C:\Program Files, but it’s not abnormal to compromise a machine and find more interesting things to do with it during post-exploitation. In many cases this would require administrative rights to access the original’s location on disk, i.e. NET binary with a modified one, there are a variety of other useful things that could be added. If we have access to overwrite an existing. It will not be exactly the same as the original, but will usually be close enough that you won’t notice much of a difference.Īs an example of what this looks like, I created a simple C# Windows Forms application in Visual Studio that displays a login prompt and prints a message on submission for whether or not the password was correct.Ĭontents of the log file created by application Closing and other potential ideas
ABYSS WEB SERVER RED CODE
The useful part about this in our case is that a decompiler can reconstruct what it thinks the original code looked like much easier from IL code. This IL code is a higher level machine language than the usual assembly language used by the CPU, such as instructions like jmp, push eax, pop ebx, etc.
Given how popular C#/.NET is in the world today, this seems like a good topic.Īs a quick overview, when a developer creates an application written in C#/.NET and compiles it, the compiler generates a file that contains what’s known as Intermediate Level code (IL code). I haven’t written anything in a while because I’ve been going through various trainings/courses, but I want to start getting back into the habit of it, so today I’m going to talk about the process of adding a backdoor to a.
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