Hizballah International Financing Prevention Amendments Act of 2017 This bill amends the Hizballah International Financing Prevention Act of 2015 to impose specified sanctions on: (1) foreign persons that knowingly assist in or provide support for fund raising or recruitment activities for Hizballah; (2) agencies of foreign governments that provide Hizballah with financial support, arms, or other assistance (export license requirements are included in addition to sanctions if such government is a state sponsor of terrorism); and (3) Hizballah, including by reason of Hizballah's significant transnational criminal activities. The bill expresses the sense of Congress that sanctions should be placed on financial institutions that serve Lebanese government officials affiliated with Hizballah. The Comprehensive Iran Sanctions, Accountability, and Divestment Act of 2010 is amended to sanction foreign financial institutions that facilitate efforts by Iran or the Islamic Revolutionary Guard Corps to aid Hizballah. The bill prescribes reporting requirements or reporting modifications with respect to: (1) foreign persons that knowingly assist or provide significant financial, material, or technological support for foreign persons assisting Hizballah; (2) financial institutions that are owned or organized under the laws of state sponsors of terrorism; (3) Hizballah's racketeering activities; (4) combating illicit tobacco trafficking networks used by Hizballah and other foreign terrorist organizations to finance their operations; (5) the estimated net worth of senior Hizballah officials and how these funds were acquired and used; and (6) countries that support Hizballah or in which Hizballah maintains important logistics networks or financial networks and steps such countries are taking to disrupt such networks.