Decentralized Ledger Technology and Financial Fraud: Unveiling Forensic Techniques

This article investigates how technology is transforming financial crimes in the digital world, turning traditional financial systems upside down. It discusses forensic methods to detect money laundering operations and the new red flags that pose a challenge to the existing ecosystem, prompting the necessity for sophisticated detection tools to fight emerging financial crimes. The rapid expansion and widespread adoption of cryptocurrencies have brought new opportunities and challenges to the financial market. Among them is the growing abuse of digital currencies to facilitate criminal activities, such as money laundering. The article examines some of the methods criminals use to exploit the anonymity, decentralization, and international nature of blockchain technology to launder money with cryptocurrencies.

Introduction

The rise of blockchain technology has led to new challenges in combating financial crime, including money laundering. With the increasing digitalization of transactions, new-generation crimes are disrupting traditional financial systems and regulatory systems. This article discusses the forensic techniques needed to identify such emerging crimes and the red flags indicating possible illicit transactions in decentralized financial systems. Also, the cryptocurrencies have transformed the way money is managed to enable fast, decentralized, and borderless transfer. Cryptocurrencies such as Bitcoin, Ethereum, and Monero are widely used not only for legitimate transfers but also for illegal ones, such as money laundering. Most cryptocurrencies conceal individuals\' identities, enabling them to transfer money without anyone knowing their real-life identities. Criminals find this aspect appealing since it enables them to conceal who they received the illegally obtained money from. The global character of cryptocurrencies also presents a jurisdictional issue. Money launderers in one nation can route money into wallets in another nation, in exchanges or DeFi protocols in an unregulated or poorly regulated jurisdiction. This ability to bypass mainstream banking infrastructure, combined with the rapidity of crypto technologies, presents serious challenges to financial regulators and law enforcers.

As more people use digital money, the criminals are finding new ways to misuse them. This means that countries must work together to come up with regulations, better monitoring tools for blockchain transactions, and help investigators build skills. Non complaint exchanges, Cryptocurrency Platforms in High-risk Regions, Defi, cryptocurrency mixing, peer to peer platforms, privacy coins, and cross-chain transactions make it difficult for law enforcement. This article examines how cryptocurrencies are being used for money laundering, summarizes issues for investigations.

Problem Domain

Money laundering is the process of concealing where illicit money originates so that it appears legal. Cryptocurrencies have created new means of money laundering with their:

Decentralized Nature: No central authority controls transactions, reducing oversight
Pseudonymity: Transactions are secured by alphanumeric wallet addresses rather than identifiable individuals.
Global Accessibility: Funds can be transferred globally instantly without the obstacle of regulation.
Anonymity Tools: Privacy-oriented cryptocurrencies such as Monero and Zcash, coupled with mixing services, conceal transaction routes.

Studies from Chainalysis indicate that cryptocurrency money laundering has increased between 2019 and 2023. The value of money laundered rose from $11.1 billion in 2019 to a peak of $31.5 billion in 2022 before declining to $22.2 billion in 2023. The increase is caused by the rapid expansion of the cryptocurrency market, the growth of decentralized finance (DeFi) platforms, and the anonymity of certain crypto transactions. Criminals take advantage of these features to obscure the source of illicit funds, posing challenges for regulators in tracing them. The decline in 2023 was partly due to more robust global efforts by authorities and stronger anti-money laundering (AML) regulations targeting cryptocurrency exchanges and wallets. The trend indicates the evolving risks and the need for more robust compliance regimes in the crypto market.

Forensics Investigation Strategies

Cryptocurrency money laundering forensic analysis involves blockchain analysis, whereby the investigators track suspicious transactions with tools to trace illicit funds. Machine learning algorithms detect unusual patterns of transactions, while law enforcement collaborates with financial intelligence units to freeze and seize the laundered money. Undercover operations and darknet monitoring also assist in the identification of criminals utilizing crypto for illicit activities. Although, some common tactics and red flags for identifications is shown in table 1 below.

Table 1: Shows some common crypto based money laundering and red flags identification

S.no.	Crypto-based money laundering can be carried out through	Details	Common Red Flags Identifications
1.	Non-compliant or Unregulated Exchanges. (Non-regulated Cryptocurrency Platforms) Note: The following tools can assist in conducting further investigations and examinations coinmarketcap.com coingecko.com	Non-compliant exchanges often do not need any KYC documents or customer due diligence (CDD) information from accounts users. Offenders can operate under a covering of extra anonymity.	It has no KYC/CDD data requirement. There are exchanges that lack anti-money laundering policies or have very low standards. These Exchanges impose no restrictions or limits on trading activity. Such Exchange enables customers to finance accounts even in case they had originally received crypto assets directly from the mixer services or tumblers. (Note: tumblers services are also known as mixer service) Example tool name: Tornado Cash.
2.	Cryptocurrency Exchanges in Sensitive Jurisdictions. (Cryptocurrency Platforms in High-risk Regions) Note: The following tools can assist in conducting further investigations and examinations coinmarketcap.com coingecko.com	Mainly countries and regions in high-risk zones, where money laundering and terrorist activities are majorly occurring. (Countries on the high risk of FATF\'s list, recently Nepal is also added in the FATF list.)	Exchange registration or legal status details are vague or ambiguous. Such exchanges have headquarters in a jurisdiction having no AML regulation. Such exchanges provide no information about the location of the exchange. Primarily they perform overseas registration. These transactions have a phone number/office information/other addresses in a riskier country.
3.	Use of Money Mules or Fake Documents on Genuine Exchanges. (Misuse of Authentic Exchanges Using Money Mules and Fake Credentials) Note: The following tools can assist in conducting further investigations and examinations. Darkwebservices/Onion services or Tor services	A money mule is someone who transfers or moves illegally attained money on behalf of someone else	Forged or fake documents may be extremely difficult to distinguish from authentic documents. (there are many channels and platforms in darkweb (offensive), where such services can be avail) Documents appearing to be forged, or stolen documents. Foreign nationals in groups can open several accounts simultaneously. Using fake KYC, IP addresses, and emails. Crypto coins pass through mixers or tumblers prior to being transferred to the mule\'s wallet ultimately.
4.	Defi -DEXs (Decentralized finance and decentralized exchange) Note: The following tools can assist in conducting further investigations and examination. Defipulse and Defiprime	Defi, Decentralized finance offers financial instruments without relying on intermediaries such as brokerages, exchanges, or banks by using smart contracts on a blockchain. The users are fully in charge of their funds using self-custody wallets.	Decentralized exchanges, or DEXs, on Ethereum are smart contract-based. This enables users to trade one crypto asset for another in real time. DEXs can be employed by criminals to avoid rules and regulations. No compliance controls A user suddenly acquires numerous crypto assets from an account that is associated with a DEX and attempts to liquidate immediately. The client cannot provide any form of evidence or say where they had obtained the funds from and why they were processing transactions on a DEX.
5.	Peer to Peer (P2P) Platforms. Note: Mentioned below are the examples of tools that can assist in conducting further investigations and examinations. Localbitcoin, binance, paxful, hodlhodl	Peer-to-Peer (P2P) platforms connect buyers and sellers directly. This allows transactions to happen without middlemen like banks or brokers. These websites offer more options, reduced costs, and allow customers to interact directly among themselves on the terms.	Large volumes of crypto assets exchanged on exchanges for fiat from wallets of P2P platforms and subsequently transferred into bank accounts do not appear to have any rational explanation for occurring. Crypto funds may originate from such sources as the dark web or mixers. RaaS (multiple ransomware services, darkweb is offering multiple RaaS)
6.	Defi Mixer Note: The following tools can assist in conducting further investigations and examinations Tornado Cash	To evade detection, criminals have routinely sought to make use of crypto asset \"mixers\". Mixer Services: These services are tough to trace, as crypto is transfered into multiple wallets, making it difficult to trace)	A customer regularly receives money from a DeFi mixer and refuses or is unable to explain where the money is coming from.
7.	Crypto ATMs	Crypto ATMs offer a suitable path for moving cash from one counterpart to a wallet, to another person located away.	Crypto Funds are from crypto asset ATMs in which crypto assets are not heavily regulated or not regulated at all. ATM issuers that do not ask for KYC data. No KYC and CDD required from the customers.

Apart from these, some tactics used by the cyber criminals include, money laundering through NFT, Mixer services, gambling services, privacy coins, darkweb services, money laundering through gaming services and money laundering through cross chain bridges.

Table 2: Some commonly used crypto investigations tools with features are as below

S.no	Investigation Tool	Features
1.	Chainalysis	Chainalysis Reactor is a blockchain money flow visualization software. They trace risky, suspicious bitcoin transactions from onion markets and fraudsters, plus sanctioned addresses are identified by Chainalysis KYT (Know Your Transaction). It comes with a clean interface for viewing and verifying crypto transactions.
2.	TRM Labs	TRM Investigator is an easy-to-use bitcoin explorer. Crypto and transaction flows can be displayed. Transaction monitoring monitors blockchain wallets so that fraud can be prevented. It also gives risk scores to transactions according to anomalous behaviour and patterns.
3.	Cipher Trace	It determines banks and VASPs\' high-risk expenses and reveals risks related to most VASPs and other virtual asset groups. It accommodates both open and closed-source data and employs specific groupings to accurately gather and collate various signs.

Conclusion

Cryptocurrencies have potential and threats for the global money system as well. They provide more access to financial services for individuals and promote innovation but also provide new means for criminals to conceal illicit proceeds in decentralized networks, anonymous accounts, and cross-border flows. Effective anti-money laundering (AML) operations in the realm of cryptocurrencies require:

Increased global regulatory cooperation.
Utilizing blockchain analysis tools for tracing illicit money flows.
Stringent KYC/AML laws for providers and exchanges.
Ongoing training for police and regulators to keep them informed of new technology.

As cryptocurrencies increasingly become part of the global financial system, balance between regulation and innovation will have to be established to avoid being used for money laundering and other financial vices.

References:

Crypto money laundering report available at https://www.chainalysis.com/blog/money-laundering-cryptocurrency/
Loss due to crypto scam available at https://www.reuters.com/technology/losses-crypto-scams-grew-45-2023-fbi-says-2024-09-09/
Digital currencies, pose higher risk available at https://www.ukfinance.org.uk/news-and-insight/blog/do-digital-currencies-and-cryptocurrencies-pose-higher-risk-money-laundering
Virtual Assets Red Flag Indicators of Money Laundering and Terrorist Financing. Available at https://www.fatf-gafi.org
Do Digital Currencies and Cryptocurrencies Pose Higher Risk of Money Laundering? Retrieved from: https://www.ukfinance.org.uk
How criminals leverage non-compliant crypto exchanges for money laundering. https://www.idnow.io/blog/how-criminals-leverage-crypto-money-laundering/

Author may be reached at pranay.iet@gmail.com and eboard@icai.in