Many organizations experience cyberattacks with the aim of the dissemination of malicious information. Situational awareness is a tool to counteract the campaigns of malicious information and reduce its dissemination. This article proposes a conceptual model for a cyber defence awareness system, which aims to support human operators to avoid this type of threat. The system will identify (classify) three campaign types of malicious information operations – malicious information injections in web content, malicious information injections in fake social network accounts, and malicious information dissemination via email messages. A model for identification of the type of campaign of malicious information operations based on Dempster-Shafer evidence theory is proposed. The work presented here is a part of the Cyber Rapid Analysis for Defence Awareness of Real-time Situation - CyRADARS project.