Companies that operate or want to operate on the international market must manage the marketing mix (product, price, distribution, promotion) well. A company cannot operate successfully on the international market without well-designed international marketing. In order to operate successfully on the international market, companies need to study the habits and preferences of consumers, which is necessary in order to know how to adapt the product and advertising to the international market and to carry out successful integrated marketing communication. As the topic of this paper is the influence of the country of origin on the brand, it was investigated how the invasion of Russia in Ukraine affects the business of Lukoil Croatia d.o.o. The subject of research in this paper is the influence of the brand's country of origin on the perception of brand quality by consumers, and how the Russian invasion of Ukraine affects the business of Lukoil Croatia d.o.o. The aim of the work is to investigate how the country of origin affects consumers and their purchase decision, and how the Russian invasion of Ukraine affects the business of Lukoil Croatia d.o.o. The aforementioned will be investigated using a systematic observation of secondary sources of information, that is, relevant professional scientific literature and statistical processing of data from primary research using a survey questionnaire. In accordance with the objectives of the primary research, the following hypotheses were set: Country of origin affects the perception of brand quality by consumers (H1) and Russia's invasion of Ukraine will not affect the operations of the multinational company Lukoil Croatia d.o.o. (H2) This work aims to contribute to a better understanding of international marketing, how integrated marketing communication can affect the company's operations and how the country of origin influences consumer attitudes when choosing products (brands). The primary research investigated which brand characteristics consumers value the most, what the country of origin represents for them and why it is important to them when choosing a product (brand), and accordingly, it was investigated how consumers perceive the company Lukoil Croatia d.o.o. which is part of the Russian group Lukoil, taking into account the current situation that arose with the Russian invasion of Ukraine.