On August 4, Senators Elizabeth Warren (D-MA), Tim Kaine (D-VA), and Chris Van Hollen (D-MD) sent a letter to the White House National Security Advisor and the Treasury Department’s Under Secretary for Terrorism and Financial Intelligence regarding their concerns over North Korea’s use of cyberattacks and cryptocurrency theft to skirt international sanctions and embargos. The letter urges the Treasury to provide details on its plan to stop North Korea from using digital assets to evade sanctions and continue with the development of nuclear weapons and ballistic missiles. The senators noted that a UN report found that in 2016, “North Korea exhibited a ‘clear shift’ to attacking cryptocurrency exchanges for the purposes of ‘generating financial revenue’” that is difficult to trace and subject to less government oversight. The letter highlights the effects of the cyberattacks, including how they have generated about $2 billion, which is then used to fund the North Korean military.  The extent of the cybercrime and cryptocurrency thefts show its use is “key” to the regime’s survival, and notes that the regime has a workforce of thousands of IT workers who operate out of many different countries. The senators asked for a response to their five questions by August 16.