image portion from @kdmsteam tweet

Not a breach, but embarrassing.

As an example of risk of reputation damage, a group calling itself KdmsTeam has recently defaced the websites of two cybersecurity companies, Avira and AVG.

The likely approach was by taking over the domain accounts of each company via their domain registrar, Network Solutions.  Domain registrars issue and manage domain names for individual or company websites. This sort of attack is sometimes referred to as DNS hijacking.  Per International Business Times, KdmsTeam is a pro-Palestinian group affiliated with the hacker group Anonymous.  The group also hacked the popular messaging website, WhatsApp.

Some tweets in the past 24 hours from the group KdmsTeam:

All three sites, AVG, Avira, and WhatsApp were offline for a period of time to address the issue.  All three sites are up at the time of this post.