The article aims to provide a comprehensive theoretical and practical analysis of the issues in the legal regulation of corruption prevention, study the state of the fight against corruption and the legalization of proceeds of corruption-related crimes under martial law, determine new corruption risks during a war, and suggest recommendations for their minimization. The authors of this article established the main problems that cause the emergence and spread of corruption in society and ways to overcome this phenomenon. The study’s results established that independent anti-corruption agencies and authorized law enforcement agencies have continued preventive and law enforcement activities even under war conditions, their purpose being to ensure the normal State functioning, the country’s defence capacity, and society’s security. In law-making and law enforcement activities, this research work can help to improve international relations between Ukraine and foreign countries in the context of the development of bilateral relations regarding the provision of assistance to Ukraine for post-war recovery, the attraction of investment, the fight against corruption, and possible accession to the European Union.