Hacktivist groups Anonymous, Sector404 and RedHack on Friday claimed they were able to breach the Mossad's firewall, access the Israeli intelligence service's mainframe and download highly sensitive and classified files.
The groups said that they were able to down the police, Justice Ministry and Population Registry websites, as well.
Anonymous further said that it was able to obtain — and leak — the personal information of over 34,000 officials, officers and agents with Israel's various law enforcement and intelligence agencies.
The leaked data reportedly contains names, ID numbers, email addresses, phone numbers, and home addresses. At least 15,000 names are allegedly of Mossad agents stationed worldwide.
Israeli authorities believe that the cyberattack was part of Anonymous's ongoing #OpIsrael campaign against Israel. The group announced on March 7 that it will launch "a coordinated, massive cyberattack on Israeli targets" on April 7, with the intent of "erasing Israel from the Internet" in a show of solidarity with the Palestinians.
The Mossad said that the agency will not comment on the matter.