This morning, I got the following warning from rkhunter:
-----
---------------------- Start Rootkit Hunter Scan ----------------------
Warning: Network TCP port 60922 is being used by
/usr/lib64/firefox/firefox. Possible rootkit: zaRwT.KiT
Use the 'lsof -i' or 'netstat -an' command to check this.
----------------------- End Rootkit Hunter Scan -----------------------
-----
The output of lsof -i is here:
-----
bash.1[~]: lsof -i
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
systemd 1 root 31u IPv4 2530 0t0 TCP *:sunrpc (LISTEN)
systemd 1 root 32u IPv4 2536 0t0 UDP *:sunrpc
systemd 1 root 33u IPv6 2543 0t0 TCP *:sunrpc (LISTEN)
systemd 1 root 35u IPv6 2550 0t0 UDP *:sunrpc
rpcbind 857 rpc 4u IPv4 2530 0t0 TCP *:sunrpc (LISTEN)
rpcbind 857 rpc 5u IPv4 2536 0t0 UDP *:sunrpc
rpcbind 857 rpc 6u IPv6 2543 0t0 TCP *:sunrpc (LISTEN)
rpcbind 857 rpc 7u IPv6 2550 0t0 UDP *:sunrpc
rpcbind 857 rpc 11u IPv6 22909 0t0 UDP *:50041
avahi-dae 890 avahi 12u IPv4 24285 0t0 UDP *:mdns
avahi-dae 890 avahi 13u IPv6 24286 0t0 UDP *:mdns
avahi-dae 890 avahi 14u IPv4 24287 0t0 UDP *:57958
avahi-dae 890 avahi 15u IPv6 24288 0t0 UDP *:39302
chronyd 917 chrony 5u IPv4 27077 0t0 UDP localhost:323
chronyd 917 chrony 6u IPv6 27078 0t0 UDP localhost:323
dhclient 1091 root 6u IPv4 31071 0t0 UDP *:bootpc
cupsd 1110 root 7u IPv4 32911 0t0 TCP *:ipp (LISTEN)
cupsd 1110 root 8u IPv6 32912 0t0 TCP *:ipp (LISTEN)
dhclient 1168 root 5u IPv6 29353 0t0 UDP
coyote:dhcpv6-client
dnsmasq 1285 dnsmasq 3u IPv4 36958 0t0 UDP *:bootps
dnsmasq 1285 dnsmasq 5u IPv4 36961 0t0 UDP coyote:domain
dnsmasq 1285 dnsmasq 6u IPv4 36962 0t0 TCP coyote:domain
(LISTEN)
sendmail 2061 root 4u IPv4 40777 0t0 TCP localhost:smtp
(LISTEN)
bash.2[~]:
-----
The output from "netstat -an" is too long to put here. I don't know
what to look for in all that.
1. What specifically should I be looking for?
2. Is rkhunter's warning a false alarm or a real problem?
thanks,
Bill.
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