In the summer of 2008, an unknown person targeted Greenberg Traurig; Sullivan & Cromwell; Wachtell, Lipton, Rosen & Katz; and Cravath, Swaine & Moore in an intricate cyberattack involving fake websites, derogatory emails and gift cards traced to a Boca Raton, Florida, mall, according to FBI files declassified earlier this week.

The documents, which are heavily redacted, laid out a bizarre scheme which involved the creation of fake websites for the four firms as well as fake emails, a practice known in the cybersecurity realm as “spoofing.” While the firms targeted had no idea why the websites were created or who could have done so, the FBI suspected that the attacks were made to gain insider information about mergers and Wall Street deals.