TryHackMe on QubesOS Kali AppVM

unman has provided templates for Kali-enthusiasts to QubesOS (v. 4.1 only) and you need to enable the repository in /etc/qubes/repo-templates/qubes-templates.repo. The mentioned command using “enable-repo …” mentioned in the forum did not work for me, so I had to edit the 1 directly in the file 🙂

Edit the repo-file:

Install the template:

Then I created an AppVM based on the Kali template and vupti, everything works perfectly.

That is except for reverse shell 🙂

I had an issue with reverse shell’s not working on Qubes Kali AppVM, due to firewall restrictions even though I disabled the firewall following these instructions(Spoiler:NOT working in Qubes AppVM).

I got no SYN-ACK to my SYN’s, and with the firewall “disabled” I tried searching elsewhere for answers. It turned out that disabling the local firewall in Kali is not enough and I am afraid to mess up security by following the guides incorrectly.

To resolve the issue, clean out the firewall rules on the local AppVM (or template VM for persistance):

└─# iptables -P INPUT ACCEPT
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X

└─# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         


This can be done in a more optimal way opening up only for the specific endpoints/IP-range’s from TryHackMe, but this just gets your reverse shells working right now.

The other, safer way, that works (if there is no inbound firewall on target host), is to change the payload in metasploit from reverse_tcp to bind_tcp with a sample:

set PAYLOAD payload/linux/x86/meterpreter/bind_tcp