An unknown hacker has released information on how Horizon Networks and other providers have secured their networks against a malicious cyberattack that disrupted the Internet and left customers unable to surf the Web.
The information, provided by Horizon Networks, shows that the company has made efforts to secure its network and mitigate the risks posed by the cyberattack.
Horizon said Monday that the hacker exploited a security vulnerability in Horizon’s Horizon client software, which it had installed on servers and other devices in the United States.
The company said it has implemented an internal review and is reviewing the security measures taken to mitigate risks.
The cyberattack has been attributed to the same hacker who attacked Target Corp., a major U.S. retailer.
The hack occurred late last month when the hacker sent a fake email to Horizon customers, claiming that a remote code execution vulnerability in the company’s Horizon software had been exploited by a remote attacker.
The hacker said it had gained access to the Horizon network by sending malicious code through Horizon’s Internet-facing portal.
The Horizon clients are used to manage the Horizon website and to monitor traffic, including traffic from other sites.
Horizon said the hacker had the means to monitor customers’ computers remotely, but Horizon said it did not know the identity of the hacker.
The hackers released the information after a series of attempts to hack into Horizon’s network failed, Horizon said.
The company said in a statement that it had deployed a series, comprehensive security measures to protect the customer data of its customers.
The hacker also released information about Horizon’s other businesses and products, including Horizon’s mobile banking service.
The information was shared with the FBI and other law enforcement authorities, Horizon officials said.
Horizon is cooperating with the investigation, Horizon customers said.
The federal Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) said it is reviewing information about the attack.
The FBI is working with the U.K. national security agencies and other authorities to determine the extent of the breach, the agency said in its statement.
In an unrelated matter, the U-K.
government has been investigating a U.N. cyber attack that disrupted services in Iraq and Iran, as well as a cybersecurity breach that affected tens of thousands of U.k. government employees.