BlockInput

Created the Friday 22 March 2024. Updated 9 months ago.

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 lifts the block when the process ends or the user initiates Ctrl+Alt+Del.

Contributor

• Serhii

Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

• https://malware.news/t/art-of-anti-detection-4-self-defense/32182