logtamper is a modified version of wtmpclean that also modifies UTMP and lastlog related entries.
You can download it from the following link: https://packetstormsecurity.com/files/download/72410/logtamper_v1_1.tgz
Source: https://packetstormsecurity.com/files/72410/logtamper_v1_1.tgz.html