Fraud detection in self-service terminal

A Self-Service Terminal (SST), comprising:

• a controller comprising at least one processor and a memory, the processor executes authentication commands and issues dispense commands associated with requested transactions being processed, wherein the controller is coupled to a dispenser and a data entry pad;
• the data entry pad to receive authentication information from a customer, wherein the authentication information is processed by the controller with the authentication commands;
• and
• the dispenser comprises the at least one processor to dispense media, wherein the at least one processor that is configured to:
• monitor the authentication commands executing on the controller;
• monitor the dispense commands issued from the controller;
• generate a pattern of the monitored authentication and dispense commands against each requested transaction;
• compare the generated pattern to known patterns corresponding to potential fraud;
• and
• place the dispenser in a suspend mode when the generated pattern matches a known pattern corresponding to the potential fraud.