A computing resource service provider may operate one or more services configured to provide customers with access to computing resources. Attackers may attempt to exfiltrate customer data from the one or more services. In order to prevent attackers from obtaining customer data the one or more services may provide specious data in response to an attack. The attack may be detected based at least in part on a set of triggers that indicate a likelihood of attack. The specious data may be configured to appear to the attacker as authentic customer data and/or that the attack is successful. Additionally, the specious data may be detectable by the one or more service, enabling the one or more service to collect additional data corresponding to the attack and/or attacker.