Search Evasion Techniques
Names, Techniques, Definitions, Keywords
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39 item(s) found so far for this keyword.
AsPack Packers
ASPack is an EXE packer created to compress Win32 executable files and to protect them against reverse engineering.
The solution makes Windows programs and libraries smaller up to 70% what leads to a reduction in the download time of compressed applications in local networks and the Internet because of their smaller size compared to uncompressed apps.
The ASPack …
AsProtect Packers
ASProtect is a multifunctional EXE packing tool designed for software developers to protect 32-bit applications with in-built application copy protection system.
It includes software compression, provides protection methods and tools for software from unauthorized copying, analysis, disassemblers and debuggers.
ASProtect 32 also provides enhanced work with registration keys and the ability to create a single application that can …
ConfuserEx Packers
ConfuserEx is a open-source protector for .NET applications. It is the successor of Confuser project. It's primarily designed to make reverse engineering difficult for applications written in .NET languages like C# and VB.NET. ConfuserEx does this by using a variety of techniques like symbol renaming, control flow obfuscation, and encryption of strings and resources.
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Supports .NET …
Call to Interrupt Procedure Anti-Debugging
This anti-debugging technique involves using the INT n instruction to generate a call to the interrupt or exception handler specified with the destination operand.
To implement this technique, the int 0x03 instruction is executed, followed by a ret (0xCD03, 0xC3) nested in a __try, __except block. If a debugger is present, the except block will not be executed, …
AddVectoredExceptionHandler Anti-Debugging
The AddVectoredExceptionHandler technique is an anti-debugging method that can detect the presence of debuggers using Vectored Exception Handlers. This technique works by calling AddVectoredExceptionHandler(1, ourHandler) to register a top-level exception handler that will catch any exceptions raised by the process, including those generated by debuggers.
After this call has taken place, stepping through the code will trigger an EXCEPTION_SINGLE_STEP …
BlockInput Others
As per Microsoft's documentation, BlockInput function "prevents keyboard and mouse input events from reaching applications," effectively restricting user interaction with the system.
Malware occasionally employs this tactic to hinder analysis by debuggers or other analysis tools throughout the process' runtime. To deactivate the block, the program must make a live call to BlockInput with the parameter 0. Windows automatically …
NtDelayExecution Sandbox Evasion Anti-Debugging
NtDelayExecution can be used to delay the execution of the calling thread. NtDelayExecution accepts a parameter "DelayInterval", which is the number of milliseconds to delay. Once executed, NtDelayExecution "pauses" execution of the calling program whuch can cause a timeout of the sandbox or loss of control in a debugger.
Additionally, some higher level WinAPI functions invoke NtDelayExeuction. For example, …
Al-Khaser_WriteWatch Anti-Debugging
Default invalid parameter values of Al-Khaser's Anti-Debug technique (VirtualAlloc/MEM_WRITE_WATCH). Used for checking API hooks in debuggers/sandboxes.
Debug Registers, Hardware Breakpoints Anti-Debugging
Registers DR0 through DR3 contain the linear address associated with one of the four hardware breakpoint conditions. For anti-debugging, malware will check the contents of the first four debug registers to see if the hardware breakpoint has been set.