An Arab hacker who has been at the forefront of recent waves of internet attacks on Israel told The Jerusalem Post
he would continue to strike key Israeli websites until the government "apologizes for their genocide in Palestine and Gaza. [sic]"
"Yes, I'll keep... attacking and publishing everything related to military or credit cards of normal people," he said in an email, hours after the websites of the Tel Aviv Stock Exchange and El Al would were taken offline.0xOmar said the two sites were struck by a new team of hackers calling themselves "Nightmare," who answered his call to attack Israel. Both sites supply important information to members of the public. Three banks were also attacked later in the day.
All of the affected websites were targeted by a Denial of Service (DoS) attack, in which large numbers of computers infected with Trojan horses are ordered to visit a website, thereby flooding its server with requests and making it unavailable to others. Dos attacks do not, however compromise servers. Trading on the Stock Exchange went uninterrupted.