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Another method is relative path DLL hijacking, which moves the vulnerable program to a location together with the malicious DLL. The DLL is loaded because the application's directory is searched early. According to CrowdStrike, this method is the most common. [7] DLL sideloading delivers both the legitimate program and malicious library. It may ...
The Global Assembly Cache (GAC) is a machine-wide CLI assembly cache for the Common Language Infrastructure (CLI) in Microsoft's .NET Framework. The approach of having a specially controlled central repository addresses the flaws [citation needed] in the shared library concept and helps to avoid pitfalls of other solutions that led to drawbacks like DLL hell.
These normally have reliable and non-conflicting addresses. So the copied DLL can use any kernel32.dll calls, f.e. to load another DLL with full advantages of a locally loaded DLL, i.e. having all relative library-dependencies. The path to that DLL is copied to the foreign address space and given as a void-parameter to the thread-function.
windows.h is a source code header file that Microsoft provides for the development of programs that access the Windows API (WinAPI) via C language syntax. It declares the WinAPI functions, associated data types and common macros. Access to WinAPI can be enabled for a C or C++ program by including it into a source file: #include <windows.h>
Pelles C is a freeware C compiler maintained by Pelle Orinius. Free Pascal is a free software Object Pascal compiler that supports the Windows API. The MASM32 package is a mature project providing support for the Windows API under Microsoft Macro Assembler (MASM) by using custom made or converted headers and libraries from the Platform SDK.
C++/WinRT is an entirely standard modern C++17 language projection for Windows Runtime (WinRT) APIs, implemented as a header-file-based library, and designed to provide first-class access to the modern Windows API. With C++/WinRT, Windows Runtime APIs can be authored and consumed using any standards-compliant C++17 compiler.
COM server DLLs are registered using regsvr32.exe, which places the DLL's location and its globally unique ID in the registry. Programs can then use the DLL by looking up its GUID in the registry to find its location or create an instance of the COM object indirectly using its class identifier and interface identifier.
MSVCRT.DLL is the C standard library for the Visual C++ (MSVC) compiler from version 4.2 to 6.0. It provides programs compiled by these versions of MSVC with most of the standard C library functions. These include string manipulation, memory allocation, C-style input/output calls, and others. MSVCP*.DLL is the corresponding C++ library.