Hack The Box

Linux

1. October
2. OpenAdmin
3. Canape
4. CronOS
5. FriendZone
6. Frolic
7. Haircut
8. Help
9. Jarvis
10. Joker
11. Lame
12. Nibbles
13. Nineveh
14. Poison
15. RedCross
16. Sunday

Windows

1. Netmon
2. Jerry
3. Devel
4. Blue
5. Bounty
6. Optimum

VulnHub

1. Bob
2. Brainpan
3. GoldenEye
4. NullByte
5. Pluck
6. Sedna

TryHackMe

1. Alfred
2. Blue
3. Brainstorm
4. Corp
5. HackPark
6. Ignite
7. Kenobi
8. Skynet
9. Steel Mountain
10. Thompson

Bonus by TJNull (HTB)

1. Sniper

2. Conceal

3. Tally

4. Bankrobber — difficult but you’ll be able to practice with a specific exploitation which is VERY common in penetration testing world and which you won’t be able to get practice about, as far as I know, any other machine on HTB.

5. Active

6. SolidState

7. Fortune — quite more difficult and not in the list of TJNull but I’d add it. It gets you involved in many techniques that you will practice on OSCP.

8. Brainfuck —Only until you get a shell as user. Privesc is sick and not OSCP at all.

9. Bart

And here a bonus with some other boxes not much OSCP-like but that I also consider a must since you will exploit different kind of technologies widely used nowadays (some might also be involved in OSCP but their exploitation may not be the same):

1. Craft

2. Mango *

3. Forest *

4. Registry

5. Silo *

6. Monteverde