Many cybersecurity experts expect a new cyberattack campaign from Iran in retaliation for the drone-based killing of Iranian Gen. Qassem Soleimani in early January.

While some cybersecurity professionals have observed additional activity from Iranian hackers since the attack on Soleimani — the website of the Federal Depository Library Program was defaced with a pro-Iran message a day later — many say the big push is still to come.