A money mule is a person who receives and transfers illegally acquired money on behalf of others. Cybercriminals, often located in Eastern European countries, require the help of accomplices to cash out compromised accounts. The use of money mules is low-risk for the criminals, who remain anonymous while the mules acting on their behalf run a high risk of being exposed, arrested, convicted and sent to prison. Professional mules are adapting to todays technologies and utilizing commercially available crimeware to complete their fraud.”]
Source: https://securityintelligence.com/who-are-knowing-money-mules/