The present describes simulating a threat-actor executing an attack execution operation. According to one aspect of the subject matter described in this disclosure, a method for generating a domain-specific language (DSL) simulant is disclosed. The method may comprise determining, a framework based on an attack repository, determining a first primitive based on the framework, and determining a second primitive based on the framework. In one implementation, the first primitive and the second primitive are fundamental structures or constructs within a DSL. The method further comprises combining the first primitive and the second primitive into a DSL simulant. In one implementation, the DSL simulant is executed to simulate a threat-actor executing an attack execution operation.