Microsoft Skype, June 19
Microsoft Skype users, mostly in Europe, endured connectivity problems due to an apparent Distributed Denial of Service attack.
Skype users started complaining about hours of downtime on June 19. The issues continued into the next day, with users losing connectivity and having trouble exchanging messages on the communications platform.
While Microsoft did not immediately confirm reports of a DDoS attack, a hacker group, called CyberTeam, claimed responsibility for the attack in a tweet.