North Korea has not carried out any cyber attacks on U.S. companies since the massive hacking of Sony Pictures Entertainment last year, top U.S. intelligence officials said Thursday.

"We haven't seen any offensive destructive actions directed against the U.S. corporate sector by the North Koreans since the Sony incident," National Security Agency Director Adm. Michael Rogers said during a House Intelligence Committee hearing.

Asked the same question, Director of National Intelligence James Clapper also said, "Not that I'm aware of."

The November attack on Sony raised serious concerns about North Korea's cyber attack capabilities.

Pyongyang is believed to have carried out the attack in anger over a Sony Pictures movie, "The Interview," which ridicules its leader, Kim Jong-un.

North Korea has denied any responsibility, though it lauded the Sony hack as a "righteous deed."

After the FBI determined the North was responsible, President Barack Obama vowed to "respond proportionally" to the attacks, and imposed new sanctions on Pyongyang in January. (Yonhap)