In a move to become a major player in the security software market, Santa Clara, Calif.-based Intel Corp. announced Thursday that it plans to acquire anti-virus software maker McAfee Inc. for almost $7.7 billion in cash, or $48 a share.

A San Francisco-based legal team from Morrison & Foerster advised the world’s largest chip maker. Robert Townsend, chair of the firm’s global corporate practice and a longtime Silicon Valley deal adviser, led the team. He was joined by corporate partners Bruce Mann and Michael O’Bryan; Jackie Liu, co-chair of MoFo’s public companies and securities group; Tessa Schwartz, an intellectual property partner in San Francisco; and compensation and benefits partner Michael Frank in Palo Alto, Calif.