Just days after hackers attacked Microsoft's Xbox live, gamers have hit forums to complain that the system is down again on Friday, Dec. 5.

The system seems to be down, as it has been reported that Xbox Live has been having issues since 7.45 p.m. ET. Users across most states in the U.S. have been reporting that the Xbox Live is down.

The latest outage comes less than a week after Microsoft's Xbox Live service shut down on Monday due to a hacking incident. Xbox One and Xbox 360 owners reported difficulties connecting to the said service after a hacker group overwhelmed the system.

On Monday night, users said that their consoles showed the 80151909 error code when they tried to connect. Moreover, when users attempted to sign in to their accounts, they received a warning that the Xbox Live profile has failed to download.

Lizard Squad

Hacking group Lizard Squad admitted that it was behind the attack after it posted a series of tweets pertaining to the incident. Its first tweet reads, "Xbox Live #offline."

Apparently, the group, which is known as the "king" of distributed denial-of-service (DDoS) attacks, used their favorite method to disrupt XBox Live's operations, which means that the hackers overwhelmed the server with a lot of requests causing it to shut down. DDoS is not a breach in data security. Microsoft and Lizard Squad have not confirmed whether user logins and other information were stolen.

This is not the first time that Lizard Squad hacked a server. In August, Sony's PlayStation Network also suffered a temporary shut down after the same DDoS attack. The group was also responsible for overwhelming requests on the servers of different online games like "Grand Theft Auto 5," "League of Legends," and "Destiny."

Meanwhile, in March, the Xbox Live service was also attacked by a different hacking group coined as Team Hype. The team accessed Xbox Live accounts of some of the "high-profile" employees. The hackers illegally obtained the Social Security data to gain access to the service and sold some of the Xbox Live user accounts.

Security improvement

The motive of Lizard Squad is still unknown although the group revealed that the recent attack was a preparation for hacking attacks on Christmas. Thus, gamers and service providers should prepare themselves against possible security breaches during the holidays.

"That's a small dose of what's to come on Christmas. #LizardSquad," the group said.

Could this latest outage be another hack?