Claymore v0.3 is an intrusion detection and integrity monitoring system. To accomplish its task, it runs from cron and reads in a list of files stored in flat ASCII, and uses md5sum to check their integrity against that recorded earlier in a database. If the database is placed on a read-only medium such as a write-protected floppy, then it should provide an infallible record against remotely installed trojan horses.
You can download it from the following link: https://packetstormsecurity.com/files/download/23236/claymore.tar.gz
Source: https://packetstormsecurity.com/files/23236/claymore.tar.gz.html