Attack Killer – is a complex automated system of Web resources protection. Tasks solved: Support of resources availability: an automatic detection and guaranteed prevention of large-scaled DDoS-attacks Support of web-applications services continuity: prevention of hacker attacks on Web applications, and detection of vulnerabilities in the web infrastructure End-to-end integration of different security tools into a unified interface makes it easy to operate the system and efficient to train users. The user receives customizable reports with recommendations for fixing. AI and ML mechanisms of Attack Killer functional modules allow reducing the probability of successful attacks to almost zero, thus ensuring less than 1% of false positives. A specialized source code scanner ensures security of the whole development cycle and the usage of business applications.