The hacker who uses Ag3nt47 as his twitter handle has hacked the Suzuki and Mazda Russia websites.
Previously they breached Harvard, Stanford, and MIT, and the information stolen was published online.
All the information from hacked websites can be seen here for Suzuki which includes password hashes and emails.
and form mazda can be seen here.
The reason for defacement is still not known, but it seems like they are targeting high profile website.