When running a security check with an Intrusion Detection software named 'chkrootkit' on Fedora 27 - Xfce Desktop Environment I get these results: Checking `sniffer'... enp0s29u1u3: PF_PACKET(/usr/sbin/dhclient, /usr/sbin/dhclient) It looks like my system (dhclient: 3976) has been attacked by network sniffers. I also found suspicious files and directories in /usr/lib/.build-id. How do I remove network sniffers from dhclient(3976)?
This is unrelated to Xfce, you should ask for help on a Q&A website, such as Fedora forum or superuser.com.