# The client writes a message to Sys::Syslog native method. # The syslogd writes it into a file and through a pipe. # The syslogd passes it via UDP to the loghost. # The server receives the message on its UDP socket. # Find the message in client, file, syslogd, server log. # Check fstat for the parent and child process. # Check ktrace for setting the correct uid and gid and exec priv. use strict; use warnings; our %args = ( syslogd => { options => ["-u"], up => qr/fork\+exec done/, nopipe => 1, noconsole => 1, nouser => 1, loggrep => { qr/ -F / => 0, qr/ -d / => 1, qr/\[priv\]: fork\+exec done/ => 1, }, fstat => { qr/^root .* wd / => 1, qr/^root .* root / => 0, qr/^root .* kqueue / => 0, qr/^root .* internet/ => 0, qr/^root .* 3\* unix stream/ => 1, qr/^root +syslogd +\d+ +([4-9]|\d\d)/ => 0, qr/^_syslogd .* wd / => 1, qr/^_syslogd .* root / => 1, qr/^_syslogd .* kqueue / => 1, qr/^_syslogd .* internet/ => 2, }, ktrace => { qr/syslogd CALL setresuid(.*"_syslogd".*){3}/ => 1, qr/syslogd CALL setresgid(.*"_syslogd".*){3}/ => 1, qr/syslogd CALL setsid/ => 0, qr/syslogd RET execve 0/ => 2, qr/\[\d\] = "-P"/ => 1, }, }, pipe => { nocheck => 1 }, tty => { nocheck => 1 }, ); 1;