Hacktivist collective Anonymous declared war on ISIS after Paris terror attacks. Ghost Security Group uncovered several Bitcoin addresses that they said, might be used by ISIS. One of the accounts they analyzed was found to contain $3 million in US dollars worth of Bitcoins. ISIS is financed by individual businessmen from 40 countries, including some G20 members, Russian President Vladimir Putin said. Putin also calls out Obama for arming and training Fighters for ISIS, saying U.S.-trained rebels were leaving to join ISIS with weapons supplied by Washington.
Source: https://thehackernews.com/2015/11/paris-attacks-isis-funding.html