Microsoft
It's believed that the hacking group is connected to the Russian military. However, the hackers were not successful in accessing any secure information due to the firm taking aggressive steps to protect data.
Due to the ubiquity of Microsoft Office and Windows operating systems, Microsoft has unusual insight into these types of breaches. It has launched a "Defending Democracy" initiative to help keep campaigns secure.
However, other Internet companies are also taking steps to protect user data as well through a variety of measures:
Twitter
Twitter is also labeling and possibly deleting tweets or media that it deems to be manipulated, deceptive or fabricated. Of course, this has brought a great deal of acrimony from people who believe the platform shouldn't censor users.
Facebook
Facebook has sought to find the balance between these interests and remain true to its mission of "connecting the world" by fact-checking content and deleting or labeling items that it feels are false or misleading. For example, it's been strict about banning or labeling posts that spread misinformation about COVID-19. It's also banning new political ads in the week before the election in another efforts to prevent misinformation from spreading.
It's also been aggressively encouraging users to register to vote and providing information about polling locations. In recent weeks, the company removed many accounts linked to Russian state actors that were spreading false information about Biden and VP candidate Kamala Harris.
Google
On YouTube, Google has also altered its algorithm which was steering users towards more polarizing videos. It's also looking to label or block videos from being played that are spreading misinformation as well as prevent certain accounts who are spreading false information from monetizing their videos.