Windows loads any DLL through AppInit.

Maliciously loading arbitrary DLL files through AppInit in Windows is a common technique used in malware attacks. AppInit is a configuration setting in the Windows operating system that specifies DLL files to be automatically loaded each time an application starts. Attackers can exploit this feature to load malicious DLL files for various attack purposes, such as keylogging, remote control, and stealing sensitive information.

To prevent attacks from loading arbitrary DLL files through AppInit, the following measures can be taken:

1. Update your operating system and applications: install the latest Windows updates and application patches promptly to fix known security vulnerabilities.
2. Utilize security software: Use security tools such as antivirus software and firewalls to scan and prevent malicious software from being downloaded and installed.
3. Disable or restrict the AppInit feature: AppInit can be disabled or restricted by modifying the registry or group policies to prevent the loading of malicious DLLs. For specific methods, refer to official Microsoft documentation or seek advice from professional security software.
4. Regularly check system files: Regularly check the integrity of system files to detect and repair cases where malicious DLLs have been replaced. It is possible to use system tools such as System File Checker (SFC) to perform the check and repair.
5. Enhance user education and awareness: Increase user vigilance against malicious software attacks by avoiding clicking on unfamiliar links or downloading unknown files, and refrain from visiting untrusted websites.

In conclusion, an effective measure to prevent attacks through the loading of arbitrary DLL files via AppInit is to keep the operating system and applications up-to-date, use security software, disable or limit the AppInit function, regularly check system files, and strengthen user education and security awareness.