Mint 19 tcpd INFECTED sha1sum

When I use rkhunter it always shows two warnings and possible 4 rootkit information: Checking for suspicious (large) shared memory segments [ Warning ] Checking for hidden files and directories [ Warning ] File properties checks... Files checked: 149 Suspect files: 0 Rootkit checks... Rootkits checked : 480 Possible rootkits: 4 Applications checks... All checks skipped The rest is ok. Using chkrootkit i always get only one alert: tcpd INFECTED. I used: sudo sha1sum /usr/sbin/tcpd and the answer was: 9ee346a9400f52e16576db35c310a72af391e199 /usr/sbin/tcpd I found out that it should be: cd9cfc19df7f0e4b7f9adfa4fe8c5d74caa53d86 /usr/sbin/tcpd Is it posible that my system is infected? I have Linux Mint 19 mate.