HTB · Linux

Hack The Box - HTB BlockSynergy Writeup - Insane - Weekly - August 29th, 2026

August 29, 2026

Target: My VPN tunnel IP: The placeholders I use throughout Placeholder What it actually is The current BlockSynergy machine IP Your HTB VPN tunnel IP The private key I generated for the hank foothold Its matching public key, with a unique comment An FTP credential visible in a root backup process Contents of /home/walter/user.txt Contents of /root/root.txt Any unique string, so you don't collide with other players on shared instances 0. Setting up my environment (and the MTU gotcha that cost me an hour) My working folder looked like this: BlockSynergy/ ├── scans/ # n…