Unicode

Verified writeups for the Unicode machine of Hack The Box

Unicode

$ tldr JWT claim misuse + Unicode normalization LFI → sudo pyinstxtractor

·	·
Operating system	Linux
Difficulty	Medium
Vector	Web
IP	10.10.11.126
Retirement date	2022-05-07
Skills	JWT Enumeration JWT - Claim Misuse Vulnerability JSON Web Key Generator (Playing with mkjwk) Forge JWT Open Redirect Vulnerability Creating a JWT for the admin user LFI (Local File Inclusion) - Unicode Normalization Vulnerability Abusing Sudoers Privilege Playing with pyinstxtractor and pycdc Bypassing badchars and creating a new passwd archive (Privilege Escalation)

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇬🇧 EN	0xdf	Texto	Open
🇬🇧 EN	IppSec	Vídeo	Open

Skill resources

Curated documentation for each technique listed in the Skills column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

Skill	Source	Link
Local File Inclusion (LFI)	HackTricks	Open
Local File Inclusion (LFI)	PayloadsAllTheThings	Open
JSON Web Tokens (JWT)	PortSwigger	Open

Related skills worth mastering

Remote File Inclusion (RFI) · Remote Code Execution (RCE)

If you liked this machine, try

• Breadcrumbs — Windows, Hard
• Waldo — Linux, Medium
• Secret — Linux, Easy
• Tabby — Linux, Easy
• Poison — Linux, Medium

---

Comments & tips

Did the official writeup not work? Found a smarter trick? Share it here — comments live in GitHub Discussions.

Last updated: 2026-06-07