AdultFriendFinder is using security firm FireEye to investigate the severe breach that saw the intimate details of 4m users leaked online.
FireEye is a public US company that gives automated threat forensics and dynamic malware protection against advanced cyber threats.
Last week, a Channel 4 News investigation discovered that AdultFriendFinder, which claims over 63m members, had sensitive data stolen by a hacker and posted online.
The hacked information included the sexual preferences of users, their sexual orientation and whether they were looking for extramarital affairs.
Personal data like email addresses, usernames, DOBs, post codes and user ISPs were also hacked.
The news agency discovered that a hacker named ROR[RG] posted the stolen AdultFriendFinder details on a secret forum on the deep web.
And now AdultFriendFinder has employed FireEye to investigate the breach, the security company has confirmed.
FireEye is using Mandiant to help with the investigation, a company FireEye acquired in 2014 that provides advanced endpoint security, incident responses and remediation.
Mandiant was described by Bloomberg BusinessWeek as the “go-to responder for cyber-espionage attacks”, and was recently used by Sony Pictures, Target and JP Morgan Chase after major breaches.
FireEye, which was founded in 2004, has over 1,500 customers across more than 40 countries, including over 100 of the Fortune 500.
Regarding the investigation, AdultFriendFinder said in a statement: “Until the investigation is completed, it will be difficult to determine with certainty the full scope of the incident, but we will continue to work vigilantly to address this potential issue and will provide updates as we learn more from our investigation.
“We cannot speculate further about this issue, but rest assured, we pledge to take the appropriate steps needed to protect our customers if they are affected.”