In this final part of the anti-debugging series we’re going to discuss process and thread block based anti-debugging. Processes and threads must be maintained and tracked by the operating system. In user space, information about the processes and threads are held in memory in structures known as the process information block (PIB), process environment block (PEB) and the thread information block (TIB). These structures hold data pertinent to the operation of that particular process or thread which is read by many of the API based anti-debugging methods we discussed previously.
When a debugger or reverse engineer tries …
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