Equifax Inc. said its systems were struck by a cyber attack that may have affected about 143 million U.S. customers of the credit reporting agency, shedding light on one of the largest and most intrusive breaches in history. Intruders accessed names, Social Security numbers, birth dates, addresses and driver’s license numbers, Equifax said in a statement. Credit card numbers for about 209,000 consumers

were also accessed, the company said. Equifax shares dropped more than 8 percent in after-hours trading. “This is clearly a disappointing event for our company, and one that strikes at the heart of who we are and what we do. I apologize to consumers and our business customers for the concern and frustration this causes,” Chief Executive Officer Richard Smith said. MORE