Ransomware attack on pipeline pushes up U.S. gas prices to nearly $3 a gallon By Kate Gibson FBI identifies oil pipeline cyberattack hackers Already rising ahead of the summer travel season, U.S. gasoline prices could soon approach $3 a gallon depending on how long a major pipeline remains out of commission after a ransomware attack. "AAA forecasts gas prices to climb this week in reaction to the shutdown," the auto club said on Monday. Prices have been edging up before the cyberattack on growing consumer demand and resurgent economic growth. Over the last week, the national average for a regular gallon of gas has risen 6 cents to $2.96, according to AAA. Should that trend continue, an increase of 3 more cents would bring the average to $2.99, making for the priciest gas since November 2014, it said.