https://arstechnica.com/information-technology/2020/01/pick-your-poison-the-potential-iranian-responses-to-us-drone-strike/

The assassination by missile last night of Iranian Revolutionary Guard Corps Quds Force commander Major General Qasem Soleimani and four other senior Iranian officers has triggered vows of revenge from Iran's Supreme Leader and other members of Iran's leadership. Those vows have raised concerns about both physical and electronic attacks by Iran against the US and other targets—including an expansion of the already noted broadening attempts at cyber attacks by Iranian state-sponsored hackers.

A Department of Defense spokesperson said in a statement on the attack, "At the direction of the President, the US military has taken decisive defensive action to protect US personnel abroad by killing Qasem Soleimani… General Soleimani was actively developing plans to attack American diplomats and service members in Iraq and throughout the region."