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In computer security, executable-space protection marks memory regions as non-executable, such that an attempt to execute machine code in these regions will cause an exception. It makes use of hardware features such as the NX bit (no-execute bit), or in some cases software emulation of those features.
The Windows Metafile vulnerability—also called the Metafile Image Code Execution and abbreviated MICE—is a security vulnerability in the way some versions of the Microsoft Windows operating system handled images in the Windows Metafile format. It permits arbitrary code to be executed on affected computers without the permission of their ...
ntoskrnl.exe (short for Windows NT operating system kernel executable), also known as the kernel image, contains the kernel and executive layers of the Microsoft Windows NT kernel, and is responsible for hardware abstraction, process handling, and memory management.
Runtime image hash validation, which involves capturing the hash of a partial or complete image of the executable loaded into memory and comparing it with stored and expected hashes. NX bit: all user data is stored in special memory sections that are marked as non-executable. The processor is made aware that no code exists in that part of ...
The last version of the tool that could run on Windows 2000 was 4.20, released on May 14, 2013. Starting with version 5.1, released on June 11, 2013, support for Windows 2000 was dropped altogether. Although Windows XP support ended on April 8, 2014, updates for the Windows XP version of the Malicious Software Removal Tool would be provided ...
It also changes Windows registry entries to allow the malware to run on startup of the machine. [4] The malware parses memory dumps by using a Windows function called ReadProcessMemory. [5] Dexter uploads the contents of the memory it parses from PoS machines to a server located in the Seychelles. [5]
The main purpose of memory protection is to prevent a process from accessing memory that has not been allocated to it. This prevents a bug or malware within a process from affecting other processes, or the operating system itself. Protection may encompass all accesses to a specified area of memory, write accesses, or attempts to execute the ...
It is a memory protection policy whereby every page in a process's or kernel's address space may be either writable or executable, but not both. Without such protection, a program can write (as data "W") CPU instructions in an area of memory intended for data and then run (as executable "X"; or read-execute "RX") those instructions.