Login Anomaly Detection System (LADS) detects anomalies in logins and logouts and can perform various actions in response.
You can download it from the following link: https://packetstormsecurity.com/files/download/32337/lads-0.8.tar.bz2
Source: https://packetstormsecurity.com/files/32337/lads-0.8.tar.bz2.html