/usr/share/aide/config/aide/aide.conf.d/31_aide_fail2ban is in aide-common 0.16~a2.git20130520-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | /var/log/fail2ban\.log$ Log
/var/log/fail2ban\.log\.1$ LowLog
/var/log/fail2ban\.log\.2\.gz$ LoSerMemberLog
/var/log/fail2ban\.log\.3\.gz$ SerMemberLog
/var/log/fail2ban\.log\.4\.gz$ HiSerMemberLog
/@@{RUN}/fail2ban/fail2ban\.(sock|pid)$ VarFile
/@@{RUN}/fail2ban$ VarDirInode
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