MasterCard’s Web site was still unavailable as of mid-morning after having been offline for several hours. Several hacker groups that have expressed support for WikiLeaks claimed credit for the attacks. WikiLeaks allies said they attacked MasterCard in retribution for the company’s decision to block WikiLeaks from its payments network. Assange is in jail in London fighting an extradition request by Swedish authorities who have charged him with rape and other sex crimes. U.S. authorities are also said to be mulling espionage and other charges against Assange.”]
Source: https://www.darkreading.com/attacks-breaches/wikileaks-allies-knock-mastercard-off-line