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Tornado Cash Mixer Sanctioned By OFAC

Tornado Cash Mixer Sanctioned By OFAC

On Monday, August 8, 2022, the  United States Office of Foreign Assets Control (OFAC) added Tornado Cash Mixer to its  Specially Designated Nationals (SDN) List. Over 7 billion dollars have been laundered using TornadoCash since its launch in 2019 and roughly 500 million of these laundered funds were linked to the North Korean hacker group, LazarusGroup.

Tornado Cash Mixer Sanctioned By OFAC
Tornado Cash Mixer Sanctioned By OFAC

What is Tornado Cash Mixer?

Tornado Cash Mixer is a non-custodial mixer built on the Ethereum blockchain. It is a smart contract mixer where users can conceal their ETH transaction history and conduct private transactions on the Ethereum Blockchain.

In general, Crypto mixers are services that combine a specific amount of cryptocurrency in exclusive pools before sending it to the intended recipients. It combines various cryptocurrency funds which could be tainted with others so as to hide the origin.In addition to preserving privacy, mixing can be used to launder money by combining funds that were obtained unlawfully.

How does the Tornado Cash Mixer Work?

With the Tornado Cash Mixer, users send the cash they need to combine to the Tornado Cash smart contract. Next, they will  receive a cryptographic note that they may use to submit a transaction referencing to withdraw their combined funds to a new address. 

After transferring mixed funds to Tornado Cash, users can take their time receiving them. The mixer even includes a feature that sends “clean” Ethereum to the user’s withdrawal address so they can pay any necessary gas fees without taking the risk of funding the withdrawal address.

According to Chainalysis Inc., “Tornado Cash has been used to launder funds from every hack conducted by North Korean-linked hackers this year.” — Chainalysis (@chainalysis) August 8, 2022

What is the significance of sanctioning Tornado Cash Mixer?

Sanctioning Tornado Cash Mixer simply means that the 44 blockchain addresses associated with the mixer must be blocked and prevented from further transactions. In addition, U.S. individuals, organizations, and/or enterprises must immediately cease doing business with the “Tornado” addresses mentioned on the SDN List. 

In addition, all linked properties and interests located in the U.S. must be blocked and reported to OFAC. Hence, any  individuals, organizations, or companies that conduct any type of business with these sanctioned parties or addresses run the risk of enforcement, which could result in civil and criminal fines. 

According to OFAC, “The ultimate goal of sanctions is not to punish, but to bring about a positive change in behavior”.

What the Tornado Cash Mixer Sanction means to Cryptocurrency Investigators.

One of the challenges faced by cryptocurrency investigators is the use of crypto mixers to obfuscate transactions. It is challenging to identify specific coin origins because they are all pooled together and then distributed at random intervals.   Hence, it’s important to have mixing services regulated to aid cryptocurrency investigations. This will help to curb the use of mixing services in numerous cryptorelated crimes such as hacks and phishing schemes.

Earlier this year, one of the founders of the Tornado Cash Mixer claimed that it is “technically difficult,” to impose sanctions against decentralized protocols like the Tornado Cash Mixer because of the way those protocols are created. 

However, with this new development, blockchain analytic firms like: chainalysis, blockchain intelligence group, anchain etc will be able to attribute the sanctioned wallets in their blockchain analytic tools.  By doing so, Cryptocurrency Investigators  will be able to follow transactions to, from, and through the sanctioned addresses, hence giving the funds visibility to assist in criminal  investigations.


As a Crypto asset user, Virtual Asset Service Provider or a Money Service Business, you are encouraged to have a Compliance and control set up in your financial institution to avoid transacting with the sanctioned addresses. Failure to do so can lead to civil and criminal fines which can tarnish the reputation of your firm.

 A&D Forensics can assist you in setting up your compliance unit as well as trace and investigate cryptocurrency related crimes. Contact us today for further inquiries on our compliance and investigation services.

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Chioma Onyekelu is a highly skilled and accomplished professional in the field of cryptocurrency and blockchain technology. She is a Certified Cryptocurrency Investigator and Crypto Compliance Specialist, as well as a Blockchain Forensic Specialist and a teacher. She is also a public speaker and her teachings include consultations and practical solutions for African Start-ups on the best and most cost-effective way to build with compliance in mind. With a wealth of knowledge and experience in these cutting-edge technologies, she is well-equipped to navigate the complex landscape of cryptocurrency-related crimes.

In her current role as a Blockchain Forensic Specialist at A&D Forensics, Chioma is responsible for tracing and investigating cryptocurrency-related crimes, as well as training law enforcement agents and compliance officers on the latest developments and best practices in the field. In addition, she is currently pursuing a Master's degree in Blockchain and Digital Currencies at the University of Nicosia in Cyprus, further solidifying her expertise and understanding of the technology.

Chioma's dedication and passion for the field is evident in her work, and she is committed to staying at the forefront of developments in cryptocurrency and blockchain technology to provide the best possible service to her clients. Her exceptional skills in educating and consulting make her a valuable asset to the industry and an authority in the field of Blockchain and Crypto Compliance.


Adedeji is a Forensic Investigation Practitioner and CertifiedBlockchain/Cryptocurrency Forensic
Investigator (CFE, CCI, CCFI & Reactor Certified) with more than Fifteen years of experience across few banks within the Nigeria Financial Sector and educator in Corporate workplace settings, Deji is uniquely qualified and involved in forensics analysis of Financial Infractions, Cryptocurrency crimes and designing plans that works for Government, Regulators, Law enforcement.

He was appointed by SEC Nigeria as Member Virtual Asset and Fintech Regulatory framework drafting Committee, He is a member of Global Digital Finance’s KYC/AML working group in France and a member of the Industry led Thinktank that worked on and came out with FATF cryptocurrency Travel rule InterMessaging Standard for Virtual Assets (IVMS101) to help combat money laundering and terrorism financing using cryptocurrencies around the globe.

His law enforcement training efforts on new money and cybercrime have seen him train many law enforcement agents in various countries i.e Nigeria Police, Nigeria Army CyberWarfare command, Zambia Financial Intelligence Unit, Zambia Central Bank and more.
He is Chainalysis Sole Africa Investigative Partner helping law enforcement investigate criminal organizations using cryptocurrency to conceal illiccit activities across Africa, he is also a training Partner for Blockchain Intelligence Group based out of Canada.

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