/etc/logcheck/violations.d/sudo is in logcheck-database 1.3.16.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sudo\[[0-9]+\]: \(pam_[[:alnum:]]+\) .*$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sudo\[[0-9]+\]: pam_[[:alnum:]]+\(sudo:[[:alnum:]]+\): .*$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sudo: .*$
|