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U.S. DEPARTMENT OF THE TREASURY
Treasury Designates DPRK Weapons Representatives
November 8, 2022

Tornado Cash Redesignated with Additional DPRK Authorities, New OFAC Guidance
WASHINGTON – Today, the U.S. Department of the Treasury’s Office of Foreign Assets Control
(OFAC) is designating two individuals for engaging in transportation and procurement activities
on behalf of the Democratic People’s Republic of Korea (DPRK). These individuals have acted on
behalf of Air Koryo, an entity previously designated by OFAC for operating in the transportation
industry in the DPRK economy. OFAC also delisted and simultaneously redesignated Tornado
Cash under Executive Order (E.O.) 13722 and E.O. 13694, as amended. The redesignation takes
into account additional information and also includes an additional basis for the designation of
Tornado Cash regarding its support for DPRK activities. Tornado Cash, an entity that provides
virtual currency mixing services, obfuscated the movement of over $455 million stolen in March
2022 by the OFAC-designated, DPRK-controlled Lazarus Group in the largest known virtual
currency heist to date. OFAC also issued a new Frequently Asked Question (FAQ) to provide
additional compliance guidance regarding the nature of the Tornado Cash entity, and updated
three existing FAQs with additional guidance.
This action is part of the United States’ ongoing efforts to limit the DPRK’s ability to advance its
unlawful weapons of mass destruction (WMD) and ballistic missile programs that threaten
regional stability and follows numerous recent DPRK ballistic missile launches, which are in
clear violation of multiple United Nations (UN) Security Council resolutions. Continued
provocation by the DPRK exemplifies the threat its unlawful weapons and missile programs
pose to its neighbors, the region, international peace and security, and the global nonproliferation regime.
“Today’s sanctions action targets two key nodes of the DPRK’s weapons programs: its increasing
reliance on illicit activities, including cybercrime, to generate revenue, and its ability to procure
and transport goods in support of weapons of mass destruction and ballistic missile programs,”
said Under Secretary of the Treasury for Terrorism and Financial Intelligence Brian E. Nelson.

INDIVIDUALS FACILITATING THE DPRK’S BALLISTIC
MISSILE AND WEAPONS PROGRAMS
Air Koryo is the DPRK’s national flag carrier and reportedly continues to own and operate all
civilian aircraft registered in the DPRK. Air Koryo previously transported parts used in Scud-B
missile systems, which fall under a UN prohibition on exporting arms and related materiel to the
DPRK. According to a UN report, Air Koryo is controlled by and integrated into the DPRK military
and the airline’s assets are actively utilized for military purposes.
Ri Sok, an Air Koryo representative in Dandong, China, was involved in the transportation of
electronic parts from China to the DPRK on behalf of the DPRK’s Ministry of Rocket Industry
(MORI). OFAC designated MORI on April 1, 2022 for being owned or controlled by the Munitions
Industry Department (MID), an entity designated on August 30, 2010 pursuant to E.O. 13382 for
its involvement with or provision of support for the DPRK’s WMD and ballistic missile programs.
The MID, which oversees the DPRK’s ballistic missile development and nuclear weapons
program, was designated by the UN on March 2, 2016.
Yan Zhiyong is a logistics manager with Air Koryo and facilitates the transportation of goods to
the DPRK. Specifically, Yan Zhiyong transported goods from China to the DPRK on behalf of the
Reconnaissance General Bureau (RGB), the DPRK’s principal intelligence agency. The RGB, which
is also involved in the DPRK’s arms trade, was designated on January 2, 2015 pursuant to E.O.
13687 for being a controlled entity of the Government of the DPRK. The RGB was designated by
the UN on March 2, 2016. Yan Zhiyong was the primary point of contact and intermediary for
shipments destined for the DPRK and has used a Beijing-based company to transport goods into
the DPRK.
Ri Sok and Yan Zhiyong are designated pursuant to E.O. 13722 for acting or purporting to act for
or on behalf of, directly or indirectly, Air Koryo, a person whose property and interests in
property are blocked pursuant to E.O. 13722 and who has ties to the DPRK’s military activities.

REDESIGNATING TORNADO CASH
In addition to the Air Koryo representatives, OFAC simultaneously delisted and redesignated
Tornado Cash under E.O. 13722 and E.O. 13694, as amended, for its role in enabling malicious
cyber activities, which ultimately support the DPRK’s WMD program. Effective immediately, the
August 8, 2022 designation of Tornado Cash is no longer operative, and it is wholly replaced by
today’s action.

Tornado Cash is an entity that provides virtual currency mixing services through smart contracts
that primarily operate on the Ethereum blockchain. The Tornado Cash smart contracts are a
form of computer code that Tornado Cash uses to implement its governance structure, provide
mixing services, offer financial incentives for users, increase its user base, and facilitate the
financial gain of its users and developers. These smart contracts have been used by actors to
obfuscate the source of funds derived from cyber heists, including funds stolen by Lazarus
Group in March 2022. Malicious cyber actors subsequently used the Tornado Cash smart
contracts to launder more than $96 million of funds derived from the June 24, 2022 Harmony
Bridge Heist, and at least $7.8 million from the August 2, 2022 Nomad Heist.
Lazarus Group used the Tornado Cash smart contracts to obfuscate the source of funds derived
from the March 2022 cyber heist. Lazarus Group was designated on September 13, 2019
pursuant to E.O. 13722 for being an agency, instrumentality, or controlled entity of the RGB,
which has been identified as part of the Government of the DPRK. Today, OFAC is sanctioning
Tornado Cash pursuant to E.O. 13722 for having materially assisted, sponsored, or provided
financial, material, or technological support for, or goods or services to or in support of, the
Government of the DPRK, a person whose property and interests in property are blocked
pursuant to E.O. 13722.
OFAC is also redesignating Tornado Cash pursuant to E.O. 13694, as amended, for having
materially assisted, sponsored, or provided financial, material, or technological support for, or
goods or services to or in support of, a cyber-enabled activity originating from, or directed by
persons located, in whole or in substantial part, outside the United States that is reasonably
likely to result in, or has materially contributed to, a significant threat to the national security,
foreign policy, or economic health or financial stability of the United States and that has the
purpose or effect of causing a significant misappropriation of funds or economic resources,
trade secrets, personal identifiers, or financial information for commercial or competitive
advantage or private financial gain. Specifically, the smart contracts through which Tornado
Cash operates were used to obfuscate the source and destination of funds derived from Lazarus
Group’s March 2022 cyber heist.

SANCTIONS IMPLICATIONS
As a result of today’s action, all property and interests in property of the individuals and entity
designated today that are in the United States or in the possession or control of U.S. persons
must be blocked and reported to OFAC. OFAC’s regulations generally prohibit all dealings by U.S.

persons or within the United States (including transactions transiting the United States) that
involve any property or interests in property of blocked or designated persons.
In addition, persons that engage in certain transactions with the individuals or entities
designated today may themselves be exposed to designation. Furthermore, any foreign
financial institution that knowingly facilitates a significant transaction or provides significant
financial services for any of the individuals or entities designated today could be subject to U.S.
correspondent or payable-through account sanctions.
The power and integrity of OFAC sanctions derive not only from its ability to designate and add
persons to the Specially Designated Nationals and Blocked Persons (SDN) List but also from its
willingness to remove persons from the SDN List consistent with the law. The ultimate goal of
sanctions is not to punish but to bring about a positive change in behavior. For information
concerning the process for seeking removal from an OFAC list, including the SDN List, please
refer to OFAC’s Frequently Asked Question 897. For detailed information on the process to
submit a request for removal from an OFAC sanctions list, please refer to OFAC’s website.
For additional information and guidance regarding sanctions implications specific to Tornado
Cash, please reference OFAC’s FAQs 1076–1079 and FAQ 1095.
For information on complying with virtual currency-related sanctions, please see OFAC’s
Sanctions Compliance Guidance for the Virtual Currency Industry here

and OFAC’s FAQs on

virtual currency here.
For more information on the individuals and entity designated today, click here.