Instead, the United States and its allies have concentrated their efforts on trying “to stop them from getting access to the financial system,” he said.
That has also proved to be difficult. The Islamic State trades with individuals and businesses in the countries it is fighting, selling oil at cut-rate prices to Kurds in Iraq and the government of Mr. Assad, among others.
The Treasury Department has imposed sanctions on nearly three dozen people linked to the group’s finances, and last week expanded those to include a Syrian construction executive it charged is helping Mr. Assad buy oil from the Islamic State, and Kirsan N. Ilyumzhinov, the Russian businessman who heads the World Chess Federation and was accused of “materially assisting” top Syrian officials and bankers.
http://www.msn.com/en-us/news/world/predatory-islamic-state-wrings-money-from-those-it-rules/ar-AAfNrw5?li=BBnb7Kz&ocid=UP97DHP