Internet technologies have become continuously more advanced, and so do the ways in which terrorists utilise them for their illicit and illegal activities funding support. The chapter notes the importance of controlling and protecting the international financial system, having a key role for the economics of global terrorism, providing an overview of different terrorist funding schemes in cyber space. Apart of this, due to the ICT financial services and tools fast development a vast field of possible criminal activities for terrorist funding are also discussed. Further, possible financial threats and attack vectors with human-in-the loop active role towards critical infrastructure of the financial sector are outlined. The role of public-private partnership for sustainable countering of terrorism funding is finally given, noting the cooperation importance between the private sector and law enforcement for early detection of suspicious financial activities.