The FBI has issued a warning to businesses about the threat of malware and hacking attacks from North Korea, as reports trace the attack on Sony to the country.
A report on Reuters said that the FBI document warns of a significant attack on a US-based business. V3 has contacted the security agency and asked for more information or a copy of the report.
Sony Pictures Entertainment was hit by a major hacking attack on its systems last week that left it without several key internal systems, including email, for several days.
The FBI releases these so-called Flash documents to companies it believes to be vulnerable to attack, but does not usually make the documents public.
The release of the document comes a day after it was revealed that Sony Pictures Entertainment had hired FireEye's specialist Mandiant team to investigate a cyber attack that caused "serious damage" to its systems.
Reports said that three people "with knowledge of the matter" had confirmed the appointment of the Mandiant forensics team, although FireEye declined V3's request for more information on the arrangement.
Reports of the Sony hack broke on 25 November when a group operating under the #GOP hashtag attempted to blackmail the firm.
"We've obtained all your internal data, including your secrets and top secrets. If you don't obey us, we'll release data shown below to the world," the group said in a message posted on the site.
At the time of publishing Sony had not responded to any of V3's requests for comment on the incident, and the truth of the hackers' claims remains unknown.
However, Reuters reported one of its sources as saying that the attack had crippled the firm's email systems and that the FBI has also been brought in to investigate the incident.
The reason for the attack remain unknown, but industry speculation suggests that #GOP may be an Asian group acting out of revenge for Sony's involvement in the soon to be released film The Interview.
The comedy title chronicles a CIA attempt to assassinate North Korean leader Kim Jong Un.
If the rumour is accurate, the decision to hire Mandiant would make sense as the firm has a strong record of detecting and tracking cyber threat campaigns in the region.
Mandiant famously uncovered evidence connecting the so-called APT1 cyber espionage campaign to a secretive branch of China's military codenamed Unit 61398 in February 2013.
During the same year Mandiant helped to mitigate the damage following the infamous Target breach.
The Target incident saw over 70 million customers' personal and financial details compromised, and led several executives, including the firm's CEO, to step down.
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