What are anti-debugging techniques?

What are anti-debugging techniques?

What is Anti-Debugging? Anti-Debugging techniques are meant to ensure that a program is not running under a debugger, and in the case that it is, to change its behavior correspondingly. In most cases, the Anti-Debugging process will slow down the process of reverse engineering, but will not prevent it.

What are different types debugging techniques in debugger?

Debugging strategies

• Incremental and bottom-up program development.
• Instrument program to log information.
• Instrument program with assertions.
• Use debuggers.
• Backtracking.
• Binary search.
• Problem simplification.
• A scientific method: form hypotheses.

What is a debugger malware?

Debuggers are essential tools for malware analysis. They allow inspection of code at a more granular level than dynamic analysis and give full control over the malware’s run-time behaviors. Using debuggers, you can execute each instruction at your convenience instead of at the pace of a modern processor.

What is TLS callback?

TLS (thread local storage) calls are subroutines that are executed before the entry point . When a particular malware employed with TLS callbacks is loaded into a debugger, the malware finishes its work before the debugger stops at the entry point.

What is an anti VM?

Malware authors sometimes use anti-virtual machine (anti-VM) techniques to thwart attempts at analysis. With these techniques, the malware attempts to detect whether it is being run inside a virtual machine. If a virtual machine is detected, it can act differently or simply not run.

Is remote debugger present?

1 Answer. From MSDN: The “remote” in CheckRemoteDebuggerPresent does not imply that the debugger necessarily resides on a different computer; instead, it indicates that the debugger resides in a separate and parallel process.

What do you understand by thread local storage?

Thread Local Storage (TLS) is the method by which each thread in a given multithreaded process can allocate locations in which to store thread-specific data. Dynamically bound (run-time) thread-specific data is supported by way of the TLS API (TlsAlloc).

How does malware detect debuggers?

Now in order to frustrate the malware analyst, malware can be detected in the presence of debuggers and show up in unexpected events. In order to detect the presence of a debugger, malware can either read some values or it can use API present to detect if the malware is being debugged or not.

What is malware analysis and malware detection?

These days malware is becoming more advanced. Malware Analysts use lots of debugging software and applications to analyze malware and spyware. Malware authors use some techniques to detect the presence of automatic analysis systems such as debuggers and Virtual Machines.

How to detect the presence of a debugger or virtual environment?

Malwares usually check the presence of these artifacts to detect the presence of a debugger or Virtual Environment. The best case would be registry artifacts, Vmware creates registry keys for Virtual Disk Controller, which can be located in registry using the following key.

What are the different types of breakpoints used by debuggers?

Debuggers use many types of breakpoints in order to stop at a particular memory address. The following are the type of breakpoints debuggers use. Software Breakpoint. Hardware breakpoint. Memory breakpoints. Conditional Breakpoints.