Company wrote on its website "Unfortunately our site is not available at the moment. We are working to restore the site as soon as possible."
Explaining the reason, it explains "The adidas Group found out that it was the target of a sophisticated, criminal cyber-attack. Our preliminary investigation has found no evidence that any consumer data is impacted."
"We have taken down affected sites, including adidas.com, reebok.com, miCoach.com, adidas-group.com and various local eCommerce shops, in order to protect visitors to our sites," it added.
"Nothing is more important to us than the privacy and security of our consumers' personal data. We appreciate your understanding and patience during this time," the company apologizes.
miCoach stated that they will be utilizing this down time for some pre-scheduled updates. "As the site was also scheduled for a number of exciting updates, we will use the current down time to make those changes," it says.
Note that just a few days ago 29 chemicals firms had been targeted by a series of cyber-attacks. In September Harvard University's website was hacked. Before that, this year Sony's PlayStation Network, Sony Pictures website and Sony Music pages were also targeted by subsequent attacks.