HTB Squashed
05 Mar 2023 - GRX6
Reconnaissance/Intelligence Gathering
In this step we collect the target information available in public repositories or sources. We do everything passively.
Scanning and enumeration
Now it’s time to start the active scanning.
As always, we define our TARGET and hosts file of our machine to facilitate the process.
TARGET=10.10.11.191
echo "10.10.11.191 squashed.htb" | sudo tee -a /etc/hosts
We launch a single TCMP probe to check ping.
ping -c 1 $TARGET
Ping is working
NMAP
To scan the target to find open ports and possible vulnerabilities we use nmap.
First, simple TCP scan without DNS resolution and ping discovery, to all the ports and with the version detection.
nmap -n -Pn -p- -sV -vvv -oG allPorts $TARGET
Discovered open port 80/tcp on 10.10.11.191
Discovered open port 22/tcp on 10.10.11.191
Discovered open port 111/tcp on 10.10.11.191
Discovered open port 2049/tcp on 10.10.11.191
Discovered open port 50061/tcp on 10.10.11.191
Discovered open port 37953/tcp on 10.10.11.191
Discovered open port 38277/tcp on 10.10.11.191
Lot of ports open.
80/TCP Apache server
ffuf -fc=404 -w /usr/share/seclists/Discovery/Web-Content/directory-list-2.3-medium.txt -u http://squashed.htb/FUZZ
111/TCP/UDP - Portmapper
rpcinfo squashed.htb
program version netid address service owner
100000 4 tcp6 ::.0.111 portmapper superuser
100000 3 tcp6 ::.0.111 portmapper superuser
100000 4 udp6 ::.0.111 portmapper superuser
100000 3 udp6 ::.0.111 portmapper superuser
100000 4 tcp 0.0.0.0.0.111 portmapper superuser
100000 3 tcp 0.0.0.0.0.111 portmapper superuser
100000 2 tcp 0.0.0.0.0.111 portmapper superuser
100000 4 udp 0.0.0.0.0.111 portmapper superuser
100000 3 udp 0.0.0.0.0.111 portmapper superuser
100000 2 udp 0.0.0.0.0.111 portmapper superuser
100000 4 local /run/rpcbind.sock portmapper superuser
100000 3 local /run/rpcbind.sock portmapper superuser
100005 1 udp 0.0.0.0.157.180 mountd superuser
100005 1 tcp 0.0.0.0.195.141 mountd superuser
100005 1 udp6 ::.191.24 mountd superuser
100005 1 tcp6 ::.175.193 mountd superuser
100005 2 udp 0.0.0.0.167.167 mountd superuser
100005 2 tcp 0.0.0.0.149.133 mountd superuser
100005 2 udp6 ::.220.240 mountd superuser
100005 2 tcp6 ::.224.9 mountd superuser
100005 3 udp 0.0.0.0.171.213 mountd superuser
100005 3 tcp 0.0.0.0.160.5 mountd superuser
100005 3 udp6 ::.166.218 mountd superuser
100005 3 tcp6 ::.219.151 mountd superuser
100003 3 tcp 0.0.0.0.8.1 nfs superuser
100003 4 tcp 0.0.0.0.8.1 nfs superuser
100227 3 tcp 0.0.0.0.8.1 nfs_acl superuser
100003 3 udp 0.0.0.0.8.1 nfs superuser
100227 3 udp 0.0.0.0.8.1 nfs_acl superuser
100003 3 tcp6 ::.8.1 nfs superuser
100003 4 tcp6 ::.8.1 nfs superuser
100227 3 tcp6 ::.8.1 nfs_acl superuser
100003 3 udp6 ::.8.1 nfs superuser
100227 3 udp6 ::.8.1 nfs_acl superuser
100021 1 udp 0.0.0.0.163.0 nlockmgr superuser
100021 3 udp 0.0.0.0.163.0 nlockmgr superuser
100021 4 udp 0.0.0.0.163.0 nlockmgr superuser
100021 1 tcp 0.0.0.0.148.65 nlockmgr superuser
100021 3 tcp 0.0.0.0.148.65 nlockmgr superuser
100021 4 tcp 0.0.0.0.148.65 nlockmgr superuser
100021 1 udp6 ::.202.177 nlockmgr superuser
100021 3 udp6 ::.202.177 nlockmgr superuser
100021 4 udp6 ::.202.177 nlockmgr superuser
100021 1 tcp6 ::.147.75 nlockmgr superuser
100021 3 tcp6 ::.147.75 nlockmgr superuser
100021 4 tcp6 ::.147.75 nlockmgr superuser
2049 - NFS Service
showmount -e 10.10.11.191
Export list for 10.10.11.191:
/home/ross *
/var/www/html *
Gaining access
We will mount the home directory of the user ross into a temporary folder. In order to mount, you must use root privileges.
mktemp -d
sudo mount -t nfs -o vers=2 10.10.11.191:/home/ross /tmp/tmp.aCuJtaIhO2 -o nolock
We can navigate through the files of ross and find the Keepass DB.
Internal reconnaissance
Maintaining access
Command and Control
Privilege escalation / lateral movements
Exfiltration
Covering tracks
Not needed as we are talking of a HTB machine…