Israel faced an escalating cyberwar on Monday as unknown attackers disrupted access to the symbolically strategic Web sites of the Tel Aviv Stock Exchange and El Al, the national airline.A hacker identifying himself as oxOmar, already notorious for posting the details of more than 20,000 Israeli credit cards, sent an overnight warning to Israel’s Ynet news outlet that a group of pro-Palestinian cyberattackers called Nightmare planned to bring down the sites in the morning.
www.nytimes.com/2012/01/17/world/middleeast/cyber-attacks-temporarily-cripple-2-israeli-web-sites.html