🧩 CTF Difficulty Cheatsheet A structured CTF difficulty classification cheat sheet designed for CTF players, penetration testers, and cybersecurity learners to help them select Capture-The-Flag labs based on their skill level.

🌐 Connect With Us

🔵 Telegram – Join Channel ⚫ Twitter/X – Follow Us 🟣 Discord – Join Server 💼 LinkedIn – Follow HackingArticles

🎓 Training Program

🚀 Join Our Cybersecurity Training Program Hands-on training in Penetration Testing, Red Teaming, and Cybersecurity. Table of Contents =================

• Easy

• Medium

• Hard

Easy ⤴

1. LAMPSecurity: CTF 4 2. LAMPSecurity: CTF 5 3. LAMPSecurity: CTF 7 4. Holynix: v1 5. pWnOS -1.0 6. pWnOS -2.0 7. DE-ICE:S1.120 8. Hackademic-RTB1 9. Tr0ll 1 10. 21 LTR: Scene1 11. Kioptrix : Level 1.1 12. Kioptrix : Level 1.2 13. Kioptrix : Level 1.3 14. Kioprtix: 5 15. SecOS: 1 16. Stapler 17. SickOS 1.1 18. SickOS 1.2 19. Simple 20. Kevgir 21. Milnet 22. Minotaur 23. Nullbyte 24. VulnOS: 1 25. VulnOS: 2.0 26. Freshly 27. Sedena 28. Nightmare 29. Orcus 30. Billu : B0x 31. Moria 1.1 32. Lazysysadmin 33. Bulldog 34. BTRSys:dv 2.1 35. BTRSys 1 36. RickdiculouslyEasy 37. Dina 38. Born2Root 39. G0rmint 40. Basic penetration 41. BSides Vancuver: 2018 42. Toppo:1 43. Billu Box 2 44. Basic Pentesting : 2 45. FourAndSix : 2 46. Jarbas : 1 47. Lampiao : 1 48. Fowsniff : 1 49. Typhoon : 1.02 50. DC-1 51. SP eric 52. DC-2 53. DC-3 54. Born2Root2 55. Sputnik 1 56. PumpkinGarden 57. PumpkinFestival 58. hackme1 59. Sunset 60. Ted:1 61. dpwwn: 1 62. The Library:2 63. WestWild: 1.1 64. dpwwn:2

• Broken: Gallery

• GrimTheRipper:1

• Hack The Kioptrix Level-1

• Seattle

• Zorz

• Pentester Lab: SQL Injection to Shell 1

• Quaoar

• Pluck

• H.A.S.T.E.

• Vulnhub Pentester Lab: S2-052

• unknowndevice64 v2.0

• Cewlkid:1

• West Wild:2

• Sunset: dawn

• Misdirection 1

• bossplayersCTF 1

• Connect The Dots:1

• Sar

• My File Server:1

• Sahu

• Geisha:1

• Katana

• mhz_cxf:c1f

• Nyx:1

• Android4

• Dc:7

• Hacker Fest: 2019

• EVM:1

• Me and My Girlfreind:1

• DevRandom CTF:1.1

• Sumo:1

• Victim:1

• eLection:1

• Sunset:decoy

• CyberSploit:1

• Loly:1

• Sunset:Twilight

• Sunset:Midnight

• Chili:1

• Healthcare:1

• ShellDredd #1 Hannah

• Mercury

• HA: Narak:

Medium ⤴

• LAMPSecurity: CTF 8

• Xerxes:1

• DE-ICE:S1.140

• Hackademic-RTB2

• Tr0ll 2

• Skytower

• PwnLab

• Mr. Robot

• Droopy

• Sydney

• Skydog

• Tommyboy

• Fristileaks

• Spyder Sec

• Acid

• Lord of the Root

• Acid Reloaded

• Hackday Albania

• Fortress

• USV

• Pipe

• Fartknocker

• Bot Challenge: Dexter

• Defence Space

• Super Mario

• Donkey Docker

• Analougepond

• Zico 2

• Covfefe

• Depth

• The Ether: Evil Science

• DerpNStink

• W1R3S.inc

• Bob:1.0.1

• The blackmarket

• Blacklight:1

• Golden Eye:1

• Temple of Doom

• Wakanda:1

• ch4inrulz:1.0.1

• MinU:1

• Raven

• Matrix:1

• Raven:2

• Escalate_Linux

• Mercy

• KFIOFan:1

• RootThis:1

• Kuya:1

• Matrix:2

• W34kn3ss 1

• Casino Royale

• Unknowndevice64:1

• HackinOS:1

• Web Developer:1

• SP ike

• DC6

• DC-4

• Development

• Silky-CTF: 0x01

• Bravery

• DC-5

• Happycorp:1

• Symfonos:1

• PumpkinRaising

• Matrix-3

• Symfonos:2

• Beast 2

• Joy

• MinU:v2

• Zeus:1

• DomDom:1

• SP:Jerome

• The Library 1

• Symfonos:3

• Clamp 1.0.1

• Tr0ll:3

• CTF KFIOFAN:2

• Nezuko:1

• Serial: 1

• Skydog Con

• Padding Oracle

• Pentester Lab: SQL Injection to Shell 2

• Gibson

• D0not5top

• EW Skuzzy

• 64 Base

• Vulnupload

• Lin.Security

• AI:Web:1

• Symfonos:4

• Sunset: Nightfall

• DC:7

• AI:Web:2

• Silky-CTF:0x02

• HA: Infinity Stones

• DC8

• DC:9

• CyNix:1

• Symfonos:5

• Five86:1

• Five86:2

• EnuBox:Mattermost

• Inclusiveness:1

• 2much:1

• MuzzyBox:1

• TBBT

• VulnUni 1.0.1

• TBBT:2

• CengBox:1

• DMV :1

• CryptoBank:1

• LAMPSecurity: CTF6

• HA: Wordy

• HA: Armour

• HA: ISRO

• HA: Joker

• HA: Naruto

• HA: Avengers Arsenal

• HA: Rudra

• HA: Chakravyuh

• Gears of War: EP#1

• djinn:1

• HA: Chanakya

• HA: Dhanush

• In Plain Sight:1

• UA: Literally Vulnerable

• Sunset-Sunrise

• Sunset: dusk

• Zion:1.1

• LemonSqueezy:1

• Seppuku:1

• HA: Natraj

• HA: Pandavas

• Glasgow Smile:1.1

• GitRoot:1

• Tre:1

• BlackRose:1

• GreenOptic:1

• Presidential:1

• Broken 2020:1

• So Simple:1

• Photographer 1

• Star Wars:1

• CengBox:2

• Pwned-1

• Relevant: 1

• Panabee: 1

• Maskcrafter: 1.1

• HA: Forensics

• KB-Vuln: 3

• HA: Vedas

• HA: Sherlock

• Cybox:1

• Hogwarts: Bellatrix

• DevGuru:1

• Tomato:1

Hard ⤴

• DE-ICE:S1.130

• Breach 1.0

• Breach 2.1

• Billy Madison

• Necromancer

• Cyberry:1

• BSides London 2017

• Game of Thrones

• Trollcave

• The Gemini inc

• PinkyPalace

• Violator

• Bulldog 2

• WinterMute:1

• /dev/random:K2

• Gemini inc:2

• Moonranker:1

• Replay:1

• Torment

• 6 Days

• IMF

• thewall

• ROP Primer:1.0.1

• USV:2017

• C0m80

• Teuchter

• Durian:1

• Prime:1

• View2aKill

• Tempus Fugit:1

• Insanity:1

• Jigsaw:1

• Mumbai:1

• PowerGrid:1.0.1

• Tempus Fugit:1

• Primer