What are Anti-debugging techniques?

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 some types of anti disassembly techniques?

Here are some common anti-disassembly techniques.

• API obfuscation.
• Opcode/assembly code obfuscation.
• Junk/spaghetti code.
• Control flow graph flattening.
• Jump instruction with same target.
• Windows API.
• CloseHandle/NtClose.
• FindWindow.

Which is the best anti debugging technique for SoftICE?

Single-step – old trick to insert 0xF1 opcode to exploit SoftICE debugging process by generating SINGLE_STEP exception. INT 2Dh – powerful interrupt technique which results in raising breakpoint exception if the process is not debugged and in normal execution if debugger is present.

Why do malware authors use anti debugging techniques?

For obvious reasons, this is something malware authors would want to prevent. 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.

Which is the first anti debugging API in Windows?

NtSetInformationThread (ZwSetInformationThread) – the first anti-debugging API implemented by Windows. Class HideThreadFromDebugger, when passed as an argument, can be used to prevent debuggers from receiving events (include breakpoints and exiting the program) from any thread that has this API called on it.

Which is the best anti-debugging cheat sheet?

CheckRemoteDebuggerPresent – same functionality as previous – simple bool function, straight use FindWindow – used to detect specific debuggers – for instance, OllyDbg window class is named “OLLYDBG” 🙂 Other popular debuggers classes checks include “WinDbgFrameClass”, “ID”, “Zeta Debugger”, “Rock Debugger” and “ObsidianGUI”

What are anti-debugging techniques?

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 is anti-debugging in the code?

For those that don’t know, anti-debugging is the implementation of one or more techniques within computer code that hinders attempts at reverse engineering or debugging a target process. Typically this is achieved by detecting minute differences in memory, operating system, process information, latency, etc.

Which is the best anti debugging tool for Windows?

AntiDBG is a collection of Windows Anti Debugging techniques. The techniques are categorized by the methods they use to find a debugger. Demos! Want to see this stuff in action?

Why do malware authors use anti debugging techniques?

For obvious reasons, this is something malware authors would want to prevent. 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.

Can a malware check if it is a debugger?

A malware can check if there is any debugger configured manually on the machine, although debugging and Anti-Debugging is not the only use for this registry key. It is also easily implemented as a technique to launch malware, since Windows does not perform any check that the “debugger” is indeed a debugger.

What’s the difference between reverse engineering and anti-debug protection?

Several approaches of anti-debug protection and some tips about how they are usually neutralized by reversers In terms of software, reverse engineering is the process of researching programs to obtain some closed information and algorithms of their work.

What are anti-Debugging techniques?

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.

How to prevent Debugging?

In this reading, we looked at some ways to minimize the cost of debugging:

1. avoid debugging. make bugs impossible with techniques like static typing, automatic dynamic checking, and immutable types and references.
2. keep bugs confined. failing fast with assertions keeps a bug’s effects from spreading.

What is the concept of Debugging?

Definition: Debugging is the process of detecting and removing of existing and potential errors (also called as ‘bugs’) in a software code that can cause it to behave unexpectedly or crash. Description: To debug a program, user has to start with a problem, isolate the source code of the problem, and then fix it.

What is anti VM trick?

This trick’s aim is to exit the program when it identifies that it is running in a virtualized environment. The most typical way to identify being in a VM is to check for specific virtualization software artifacts installed in the machine.

How do I hide a virtual machine?

To revoke access and make the VM invisible, you simply have to assign the “No access” role to the Virtual Machine object.

1. Navigate to the Virtual Machine.
2. Open the Permissions tab.
3. Right Click and select Add Permissions…
4. Assign the No Access Role to the user you want to hide the Virtual Machine from.
5. Press OK.

Is there a way to bypass anti debugging?

Depending on which debugger you are using, there are a few options. VEH debugger option in Cheat Engine will bypass some anti-debugging techniques. Thanks for contributing an answer to Reverse Engineering Stack Exchange!

How to implement an anti-debug protection technique?

One should just perform the actions inverse to the check ones before the check is performed, i.e. put 0 the the NtGlobalFlag field of the PEB structure of the debugged process before this value is checked by the anti-debug protection.

Is there a way to trick a debugger?

Stack Segment register – already described in “Trap flag” section – due to incorrect execution of SS registers, it is possible to trick the debugger setting the flag and check its value immediately. The best protection against debugging so far seems to be own virtual machine.

Which is the best anti debugging technique for SoftICE?

Single-step – old trick to insert 0xF1 opcode to exploit SoftICE debugging process by generating SINGLE_STEP exception. INT 2Dh – powerful interrupt technique which results in raising breakpoint exception if the process is not debugged and in normal execution if debugger is present.