ångstromCTF – lithp
Solving a lisp challenge with no actual understanding of lisp.
ångstromCTF – streams
Problem White noise is useful whether you are trying to sleep, relaxing, or concentrating on writing papers. Find some natural white noise here. Note: The flag is all lowercase and follows the standard format (e.g. actf{example_flag}) Author: ctfhaxor Points: 70 Hint: Are you sure that’s an mp4 file? What’s inside the file? Solution First, we…
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Meeting Notes 4/18
Tonight I gave a tutorial on IDA Pro basics, and how to get started with this awesome tool. I also released some new binaries on the CTF site for you to practice IDA. Remember, as a OSU Security Club member you have access to our lab systems, which has the full version of IDA Pro…
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2019-2020 Officer Elections on April 25th
We will be holding officer elections for next school year during our regular meeting on Week 4 (April 25th). This is a great way to be more involved with the club, and represent us to the College of Engineering. Here are the positions (link goes to position duties): President Vice President Treasurer Multimedia Coordinator Lab…
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PRCCDC 2019 Results
This past weekend, OSUSEC competed at the Pacific Rim Collegiate Cyber Defense Competition (PRCCDC) hosted by Highline College. I’m pleased to announce that we placed 3rd out of 13 teams in this tough competition. PRCCDC is a 2 day competition where each team must secure a mix of approximately 10 Windows and Linux systems, configure…
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UTCTF 2019 – Scrambled
Tl;dr Cool encoding using Rubik’s cube, I wrote a Python script. This was a 1250 point Forensics challenge (highest points in the category). Here’s the description: By the time I took a look at the challenge, they had released a hint as well: Based on the hint, I quickly discovered that the challenge description described…
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UTCTF 2019 – Crackme
This was a 1200 point reversing challenge (tied for highest point value in the category). Here’s the description: This what we see when we run the binary: $ ./crackmePlease enter the correct password.>plsIncorrect password. utflag{wrong_password_btw_this_is_not_the_flag_and_if_you_submit_this_i_will_judge_you} Let’s take a look at the code in IDA Pro: Here’s what the decompilation shows: Read in 64 bytes from…
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UTCTF 2019 – Rogue Leader
Problem Description Our once-venerable president has committed the unspeakable crime of dine-and-dashing the pizza during our own club meetings. He’s on the run as we speak, but we’re not sure where he’s headed. Luckily, he forgot that we had planted a packet sniffer on his laptop, and we were able to retrieve the following capture…
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Meeting Notes – 3/7
Thanks to Kees Cook for an awesome look at kernel security! Kees talked about how the kernel exploit for CVE-2017-7038 was discovered, which allowed privilege escalation due to a heap overflow. You can see his slides here, which also has information for building the POC images for the exploit. This was our last meeting for…
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Meeting Notes 2/28 – OSUSEC Lab
Tonight I talked about the new OSUSEC lab environment! A few systems are currently live, and more will be coming up through the end of the term, including the self-registration system. For information about the lab environment, please see the dedicated page for it.
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