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Password Cracking Flash CTF

Welcome to the Fall 2025 Kickoff Capture The Flag competition! You will work in teams of 4. Questions have varying point values.

Total Points Available: 325

NOTE: Your correct answers are being saved and sent even if you refresh the page.

Team: Not set

Password Cracking​

Challenge 1​

(10 points)

We've received a password hash from the rockyou breach:

84d961568a65073a3bcf0eb216b2a576

Challenge 2​

(15 points)

We've received a password hash based on sports:

f64d4211274466092708a6eea3342151245584673c8ea8a46a4caa4fdef9d73a

Challenge 3​

(10 points)

We've received a password hash in the format of THP-DML?-249# where ? is an uppercase letter and # is a digit:

cc1f062de5a0967c1c3d7ae4b4c5aeee

Challenge 4​

(10 points)

We've received a windows password hash:

E395FEF7152D0C07AAD3B435B51404EE:20CAF4C7BCCEA1964E1646D17B1C040F

Challenge 5​

(20 points)

We've received a password hash in the format of an animal with 2 digits appended:

ca07b2edbbf3828ec7d5520914be841d

Challenge 6​

(30 points)

We've received a password hash based on the 10k most common passwords with 1 digit prepended. (Hint: SecLists)

e33ed4caab4356c883fb0eddef8176db

Challenge 7​

(25 points)

We've received an encrypted PDF file with a password from rockyou.txt.

Download PDF (If it opens in new tab, use Ctrl/Command + S to save).

Challenge 8​

(25 points)

We've received an encrypted ZIP file with a password in the form of password-23##52 where # is a digit.

Download Zip

Challenge 9​

(60 points)

We've received a linux binary that asks for a password, can you figure it out?

Download Binary

Challenge 10​

(50 points)

We've received a /etc/shadow file from a linux environment, can you get into admin account? It seems to be based on default passwords. (Hint: SecLists)

Download /etc/shadow

Challenge 11​

(40 points)

We've received a password hash that's based on our about page with 1 number appended. (Hint: You can make a wordlist with cewl <website> -w <output>)

1719e76336b93effb3d3cc3ca781fade

Challenge 12​

(30 points)

We've recieved a zip file with an encrypted zip file inside, can you get in? (Hint: meta)

Download Zip

Credits​

  • Author(s): Divesh Gupta (legendile7)