[MEDIA STATEMENT]: We would like to point out that @ MAS is lying about user data not being compromised. Refer to earlier imgur link. ||||| HONG KONG (AP) — Hackers defaced the website of Malaysia Airlines on Monday and threatened to dump stolen information online after posting a glimpse of customer data obtained in the attack. 
 
 Workers stand behind a computer which shows the hacked website of Malaysia Airlines, at a cafe in Petaling Jaya outside Kuala Lumpur, Malaysia, Monday, Jan. 26, 2015. The airline's site was changed on... (Associated Press) 
 
 A man points at the computer screen showing Malaysia Airlines' hacked website, at a cafe in Petaling Jaya outside Kuala Lumpur, Malaysia, Monday, Jan. 26, 2015. The airline's site was changed on Monday,... (Associated Press) 
 
 The airline's site was down for at least seven hours, replaced by a message from the Lizard Squad hacker group, before the company brought it back online by mid-afternoon in Malaysia. 
 
 The hackers at first changed the site to display a message saying "404 - Plane Not Found" and that it was "Hacked by Cyber Caliphate," with a photo of one of the airline's Airbus A380 superjumbo jets. The browser tab for the website said "ISIS will prevail." 
 
 Malaysia Airlines is struggling to recover from twin disasters last year, including the disappearance of Flight 370, which authorities believed crashed 1,800 kilometers (1,100 miles) off Australia's west coast, and the downing of Flight 17 over Ukraine. 
 
 The hackers later replaced the jet with a picture of a lizard in a top hat, monocle and tuxedo smoking a pipe. The Islamic State reference was removed and the claim of responsibility changed to "Lizard Squad - Official Cyber Caliphate," with a link to the group's Twitter account. 
 
 Notorious from their attention-seeking antics, Lizard Squad has claimed responsibility for a variety of hacks over the past year, most of them aimed at gaming or media companies. Lizard Squad occasionally makes tongue-in-cheek claims to support Islamic State, although there are no known links between the groups. 
 
 The airline said in a statement that it was a "temporary glitch" that didn't affect passenger bookings and that the breach had been reported to Malaysia's transport ministry and Internet security agency. It said user data "remains secured." 
 
 Lizard Squad, however, tweeted that it was "going to dump some loot found on malaysiaairlines.com servers soon," and posted a link to a screenshot of what appeared to be a passenger flight booking from the airline's internal email system. 
 
 The particular booking was made by Malaysian Amy Keh, who said she had made it in October for her mother and two relatives to travel from Kuala Lumpur to Taiwan in March. 
 
 "I am a bit worried about their security. Now the whole world knows that they will be going to Taipei," said Keh, who logged on Monday to check the itinerary. She said the website looked different and called the airline, which told her of the hacking. However, she only found out when contacted by The Associated Press that the travel information was posted online 
 
 The Lizard Squad group last year claimed it was behind attacks on Sony's online PlayStation network and Microsoft's Xbox site. 
 
 In August, it also tweeted to American Airlines that there might be explosives on a plane carrying the president of Sony Online Entertainment, which makes video games, forcing the flight to be diverted. 
 
 Explaining how the hack had occurred, Malaysia Airlines said its domain name system was "compromised" and users were redirected to the hacker group's website. The domain name system translates web addresses typed into browsers into the numbers that computers use to identify and connect with each other on the Internet. 
 
 The Islamic State group now holds about a third of both Syria and Iraq, territory it has declared a caliphate. Police in Malaysia detained 43 people last year on suspicion of links to the extremist group, underscoring concerns held by Prime Minister Najib Razak that the spread of Islamic State ideology could lead to conflict in predominantly Muslim Malaysia. 
 
 ___ 
 
 AP Writer Eileen Ng in Kuala Lumpur contributed to this report. ||||| Web check-in available from 48 hours and up to 90 minutes before departure. Passengers on the same booking reference may have the possibility to view certain personal data. To retrieve your booking and maintain your privacy, please use your 13 digit e-ticket number and last name. ||||| Story highlights Malaysia Airlines website taken down by group calling themselves Cyber Caliphate 
 
 But the airline claims its systems were intact and users were instead redirected to hackers' site 
 
 Hong Kong (CNN) The official Malaysia Airlines website has been hacked by a group claiming to support Islamist terror group, ISIS. 
 
 On logging into www.malaysiaairlines.com on Monday morning, users were presented with an image of a Malaysia Airlines Airbus and messages that read "404 -- Plane Not Found" and "Hacked by Lizard Squad -- Official Cyber Caliphate." 
 
 The browser tab also read "ISIS will prevail." 
 
 The Malaysia Airlines homepage later changed to a black background featuring a mocked-up image of a lizard in a top hat complete with monocle. Users were directed to a Twitter page called "@lizardmafia," which featured a series of largely asinine posts. 
 
 The airline, which is currently restructuring itself in the wake of the loss of two of its airliners last year, could not be contacted by telephone. 
 
 Hack denied 
 
 In a post on its Facebook account, the airline denied its internal servers, which contain passenger information, had been compromised. It said its Domain Name System (DNS) had instead been hijacked, with users redirected to the hackers' website. 
 
 The airline added the issue has now been resolved with its service provider and the system is expected to be fully recovered within 22 hours. The matter has also been reported to Malaysian authorities, it said. 
 
 But the hackers, identifying themselves as the Lizard Squad, took to Twitter claiming they had penetrated Malaysia Airlines' email account and posted a screenshot. 
 
 Meanwhile, tweets from the airline's official account directed users to a separate URL for its online booking service. This link worked as normal. 
 
 READ: Malaysia Airlines slashes 6,000 jobs in major restructuring
– A hacker group that's claimed responsibility for PlayStation and Xbox network outages in recent months has hit a new target. Hackers claiming to be from "cyber caliphate" Lizard Squad took over Malaysia Airlines' website for at least seven hours today, replacing the homepage with an image of a lizard in a tuxedo and the message "404 - Plane Not Found," the Guardian and the AP report. (The site is currently back up and running.) The words "Hacked by Lizard Squad -- Official Cyber Caliphate" were also visible. At one point, the browser tab read "ISIS will prevail," CNN reports. Users were directed to the Twitter page for @lizardmafia, where a posted tweet read, "Going to dump some loot found on malaysiaairlines.com servers soon." In a Facebook post, Malaysia Airlines said its domain name system was hacked rather than its internal servers, which hold passenger data. The "glitch" redirected visitors to the hackers' site, the airline said, noting the issue was reported to CyberSecurity Malaysia and the Ministry of Transport. However, a tweet from @lizardmafia says the airline is "lying about user data not being compromised." The account claims to have hacked Malaysia Airlines' email system and posted a screenshot of what appeared to be a flight booking by customer Amy Keh. She tells the AP she booked a flight for her mother and two relatives in October. "I am a bit worried about their security," she says. "Now the whole world knows that they will be going to Taipei."