(Reuters) -- Two weeks after disclosing that its Web site had been hacked, a private intelligence-analysis firm on Friday warned subscribers that hackers were now circulating false emails offering the company's services for free.

Strategic Forecasting Inc., also known as Stratfor, urged subscribers not to open attachments to the fraudulent emails, which offered subscribers the company's premium content for free as compensation while it tried to secure its Web site.

In an email, Stratfor CEO George Friedman told subscribers that the email address being used was not his, and the company would never ask customers to provide personal information through an attachment.

This email, and all similar ones, are false and attempt to prey on the privacy concerns of customers and friends, Friedman wrote.

Friedman's email included a link to a YouTube video in which Fred Burton, the company's vice president of intelligence, asked people to monitor Stratfor's Facebook site and Twitter feed for company-approved communications.

Friedman said he deeply regretted any inconvenience caused by the latest incident and said the company was still working to re-establish its data systems and Web presence.

The fake email invited clients to provide feedback about the recent intrusion by those deranged, sexually deviant criminal hacker terrorist masterminds, and provided both mobile and home phone numbers for Friedman.

While not offering free content, Stratfor has offered paying subscribers a year of free identity protection services by Austin, Texas-based CSID, which monitors Web sites and forums on which stolen information is exchanged or sold.

Last month, Stratfor disclosed that its Web site had been hacked and that some information about its corporate subscribers had been made public.

The hacking group known as Antisec has claimed responsibility for the attack and published what it claims are the names of thousands of corporate and government customers of Stratfor, as well as email addresses, passwords, and credit-card numbers of individual subscribers to Stratfor services. Customers on the list published by Antisec include the Bank of America Corp., Exxon Mobil Corp., Goldman Sachs Group Inc., Interpol, Thomson Reuters, the U.S. military, and the United Nations.

(Reporting by Andrea Shalal-Esa in Washington; editing by John Wallace)