ViperDB was created as a smaller and faster option to Tripwire. ViperDB does not use a fancy all-in-one database to keep records. Instead it uses a plaintext db which is stored in each “watched” directory. By using this there is no real one attack point for an attacker to focus his attention on. This coupled with the running of ViperDB every 5 minutes (via cron root job) decreases that likelihood that an attacker will be able to modify your “watched” filesystem while ViperDB is monitoring your system.
You can download it from the following link: https://packetstormsecurity.com/files/download/10418/viperdb_v0.9.1.pl.txt
Source: https://packetstormsecurity.com/files/10418/viperdb_v0.9.1.pl.txt.html