The AVAST forum is currently offline and will remain so for a brief period. It was hacked over this past weekend and user nicknames, user names, email addresses and hashed (one-way encrypted) passwords were compromised. Even though the passwords were hashed, it could be possible for a sophisticated thief to derive many of the passwords. If you use the same password and user names to log into any other sites, please change those passwords immediately. Once our forum is back online, all users will be required to set new passwords as the compromised passwords will no longer work.
This issue only affects our community-support forum. Less than 0.2% of our 200 million users were affected. No payment, license, or financial systems or other data was compromised.
We are now rebuilding the forum and moving it to a different software platform. When it returns, it will be faster and more secure. This forum for many years has been hosted on a third-party software platform and how the attacker breached the forum is not yet known. However, we do believe that the attack just occurred and we detected it essentially immediately.
We realize that it is serious to have these usernames stolen and regret the concern and inconvenience it causes you. However, this is an isolated third-party system and your sensitive data remains secure.
CEO AVAST Software
A new type of malware has been found today which uses the Google search engine database for hosting. Werner Klier (virus researcher from GData) pointed us to one very puzzling result of Google search. This result was detected as malware with avast! from the beginning. It is however a very interesting approach from malware creators – using Google to host their malware. Here I’ll describe how this infection works (virus researchers from GData, Ralf Benzmüller and Armin Büscher, reached the same conclusion).
In the previous month the World Wide Web was subject to one of the heaviest attacks since it first came into existence. Thousands of legitimate websites were attacked by the Trojan horses JS:Redirector-H and JS:Redirector-J, the aim of which was to infect millions of unsuspecting users. avast! was the first antivirus program to detect the infection right at the start and all users of avast! were protected throughout the duration of the attack. Now, more than a month after the attack was first detected, it is possible to assess the attack.