A system for detecting and preventing execution of malware on a target system includes an interface for receiving training data. The training data includes domain names known to be legitimate and domain names known to be associated with malware. The system is configured to train a first model to classify the domain names in the training data as being legitimate domain names or malware-associated domain names using a supervised learning methodology. The system configured to train a second model to predict a correct domain name associated with domain names in the training data using an unsupervised learning methodology. The system configured to train a third model to classify the domain names in the training data as being legitimate domain names or malware-associated domain names based on an output of the first learning model and an output of the second learning model.