Methodological and legislative issues of ensuring economic security are investigated within the framework of the article. The novelty of the research topic is about the statement of the problem determined by the negative consequences of globalization of international relations, which led to an increase in the rates of transnational crime and has become a threat to international security. The purpose of the study is to find out areas for optimizing international cooperation on counteraction to economic crimes, taking into account the specifics of the current stage of socioeconomic integration. The research tasks included disclosure of the legal nature of corruption as a basic component of the shadow economy, essential properties and signs of corruption as a negative social phenomenon, determining the quality of implementation of international standards within the framework of legislation of national legal systems and establishing priority areas for cooperation between states to ensure economic security. The methodology of the research is based on a set of general scientific, private, and special methods of scientific knowledge that allow the system to structure, subject to formal and legal means, a mechanism for counteracting economic crimes and conduct a comparative legal analysis, identifying general and specific trends in ensuring economic security in various legal systems. As a result of the study, it was concluded that one of the problems of ensuring economic security at the international level is the absence in the international acts of a unified approach to the concept of corruption, which naturally caused in the foreign legislation legal pluralism in regulating the grounds for bringing to legal, including criminal liability. The problems of the definitive correlation of corruption inspire inadequate coherence of measures to counter international corruption in terms of identifying, disclosing, prophylactic and preventing corruption. The effectiveness of international legal cooperation presupposes the unification of approaches to the qualification of criminally punishable offenses of corruption orientation, proceeding from corrupt schemes of state, ecological, economic crime associated with illegal transfer of funds within the shadow turnover and legalization of incomes.