CryptoCat
@cryptocat.me
Security Researcher 😈
Hacking Content @ https://yt.cryptocat.me 💜
Hacking Content @ https://yt.cryptocat.me 💜
Pinned
CryptoCat
@cryptocat.me
· Jun 13
GitHub - Crypto-Cat/CTF: CTF chall write-ups, files, scripts etc (trying to be more organised LOL)
CTF chall write-ups, files, scripts etc (trying to be more organised LOL) - GitHub - Crypto-Cat/CTF: CTF chall write-ups, files, scripts etc (trying to be more organised LOL)
github.com
CTF resources 😺
I've been working hard to move my written content from gitbook over to my own website 👷♂️
It's still a work in progress, but I'm pretty happy with the results so far 🙂
🔗 cryptocat.me/blog/
It's still a work in progress, but I'm pretty happy with the results so far 🙂
🔗 cryptocat.me/blog/
December 31, 2025 at 12:43 PM
I've been working hard to move my written content from gitbook over to my own website 👷♂️
It's still a work in progress, but I'm pretty happy with the results so far 🙂
🔗 cryptocat.me/blog/
It's still a work in progress, but I'm pretty happy with the results so far 🙂
🔗 cryptocat.me/blog/
Wishing a very hacky christmas to all the hacker fam! 🎅
December 25, 2025 at 10:02 AM
Wishing a very hacky christmas to all the hacker fam! 🎅
Manipulating Memory with Cheat Engine - Hacky Christmas [NahamCon 2025 CTF]
YouTube video by CryptoCat
youtu.be
December 19, 2025 at 4:21 PM
The #NahamCon2025 CTF is over ✅ Writeups for my challs 👇
🎮 Hacky Christmas ➡ book.cryptocat.me/blog/ctf/202...
💥 VulnBank ➡ book.cryptocat.me/blog/ctf/202...
💥 Snorex 2K CCTV ➡ book.cryptocat.me/blog/ctf/202...
Stay tuned for a video walkthrough of Hacky Christmas 🎅🎄
🎮 Hacky Christmas ➡ book.cryptocat.me/blog/ctf/202...
💥 VulnBank ➡ book.cryptocat.me/blog/ctf/202...
💥 Snorex 2K CCTV ➡ book.cryptocat.me/blog/ctf/202...
Stay tuned for a video walkthrough of Hacky Christmas 🎅🎄
![Hacky Christmas Challenge [gamepwn]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:kubwqlylxvsepe7y2rsjoeuo/bafkreidjipmbxkahtq3fmwhfnuodr74uqibswijhvagrzxguyivostrawa@jpeg)
December 18, 2025 at 9:19 PM
The #NahamCon2025 CTF is over ✅ Writeups for my challs 👇
🎮 Hacky Christmas ➡ book.cryptocat.me/blog/ctf/202...
💥 VulnBank ➡ book.cryptocat.me/blog/ctf/202...
💥 Snorex 2K CCTV ➡ book.cryptocat.me/blog/ctf/202...
Stay tuned for a video walkthrough of Hacky Christmas 🎅🎄
🎮 Hacky Christmas ➡ book.cryptocat.me/blog/ctf/202...
💥 VulnBank ➡ book.cryptocat.me/blog/ctf/202...
💥 Snorex 2K CCTV ➡ book.cryptocat.me/blog/ctf/202...
Stay tuned for a video walkthrough of Hacky Christmas 🎅🎄
I made a couple of [easy-med] challenges for #NahamCon2025 - you've got 24 hours! 💜
🎮 ctf.nahamcon.com/hubs/hacky-c...
💥 ctf.nahamcon.com/hubs/vuln-bank
💥 ctf.nahamcon.com/hubs/snorex-...
Here's a sneak peek at Hacky Christmas 🎅 Can you escape the ice box and take out 1 MILLION gingerbread men? 🎄
🎮 ctf.nahamcon.com/hubs/hacky-c...
💥 ctf.nahamcon.com/hubs/vuln-bank
💥 ctf.nahamcon.com/hubs/snorex-...
Here's a sneak peek at Hacky Christmas 🎅 Can you escape the ice box and take out 1 MILLION gingerbread men? 🎄
December 17, 2025 at 8:40 PM
I made a couple of [easy-med] challenges for #NahamCon2025 - you've got 24 hours! 💜
🎮 ctf.nahamcon.com/hubs/hacky-c...
💥 ctf.nahamcon.com/hubs/vuln-bank
💥 ctf.nahamcon.com/hubs/snorex-...
Here's a sneak peek at Hacky Christmas 🎅 Can you escape the ice box and take out 1 MILLION gingerbread men? 🎄
🎮 ctf.nahamcon.com/hubs/hacky-c...
💥 ctf.nahamcon.com/hubs/vuln-bank
💥 ctf.nahamcon.com/hubs/snorex-...
Here's a sneak peek at Hacky Christmas 🎅 Can you escape the ice box and take out 1 MILLION gingerbread men? 🎄
I also made some challenges for #NahamCon2025, hope you will check them out! 🎅
Ready for #NahamCon2025 (Winter Edition) tomorrow? 🚀
Prepare to win by revisiting the NahamCon 2025 CTF challenges
We’ve curated 8 dedicated Hubs to help you sharpen your skills before the new event kicks off.
✅Get started: https://app.hackinghub.io/hubs/nahamcon-2025-ctf
Prepare to win by revisiting the NahamCon 2025 CTF challenges
We’ve curated 8 dedicated Hubs to help you sharpen your skills before the new event kicks off.
✅Get started: https://app.hackinghub.io/hubs/nahamcon-2025-ctf
December 16, 2025 at 3:45 PM
I also made some challenges for #NahamCon2025, hope you will check them out! 🎅
New video covering the solution to the Mother Printers challenge I created for @hackinghub.bsky.social 💜
Tried to make it as beginner friendly as possible as I know many players aren't familiar with rev/pwn 😇
youtu.be/ebNYtX_8lOY
Tried to make it as beginner friendly as possible as I know many players aren't familiar with rev/pwn 😇
youtu.be/ebNYtX_8lOY
Mother Printers (Print2Own) - Full Exploit Chain Walkthrough [HackingHub]
YouTube video by CryptoCat
youtu.be
December 1, 2025 at 2:08 PM
New video covering the solution to the Mother Printers challenge I created for @hackinghub.bsky.social 💜
Tried to make it as beginner friendly as possible as I know many players aren't familiar with rev/pwn 😇
youtu.be/ebNYtX_8lOY
Tried to make it as beginner friendly as possible as I know many players aren't familiar with rev/pwn 😇
youtu.be/ebNYtX_8lOY
Didn't get chance to solve my "Mothers Printers" challenge on @hackinghub.bsky.social? 🖨
Here's the official writeup ➡ book.cryptocat.me/blog/ctf/mon...
Prefer video? Stay tuned for a beginner-friendly walkthrough on YT next week ▶
Here's the official writeup ➡ book.cryptocat.me/blog/ctf/mon...
Prefer video? Stay tuned for a beginner-friendly walkthrough on YT next week ▶
November 27, 2025 at 10:39 AM
Didn't get chance to solve my "Mothers Printers" challenge on @hackinghub.bsky.social? 🖨
Here's the official writeup ➡ book.cryptocat.me/blog/ctf/mon...
Prefer video? Stay tuned for a beginner-friendly walkthrough on YT next week ▶
Here's the official writeup ➡ book.cryptocat.me/blog/ctf/mon...
Prefer video? Stay tuned for a beginner-friendly walkthrough on YT next week ▶
Time to drop a couple of hints for my @hackinghub.bsky.social challenge!
1️⃣ First flag is on the website (you need to find it before flag 3/4/5)
2️⃣ The chall is inspired by some cool research I read (go find it)
Writeups will be published once we hit 10 solves ➡ app.hackinghub.io/hubs/mother-...
1️⃣ First flag is on the website (you need to find it before flag 3/4/5)
2️⃣ The chall is inspired by some cool research I read (go find it)
Writeups will be published once we hit 10 solves ➡ app.hackinghub.io/hubs/mother-...
app.hackinghub.io
November 18, 2025 at 11:42 AM
Time to drop a couple of hints for my @hackinghub.bsky.social challenge!
1️⃣ First flag is on the website (you need to find it before flag 3/4/5)
2️⃣ The chall is inspired by some cool research I read (go find it)
Writeups will be published once we hit 10 solves ➡ app.hackinghub.io/hubs/mother-...
1️⃣ First flag is on the website (you need to find it before flag 3/4/5)
2️⃣ The chall is inspired by some cool research I read (go find it)
Writeups will be published once we hit 10 solves ➡ app.hackinghub.io/hubs/mother-...
Congratulations to Bhavya for being the first to capture all 5 flags on my @hackinghub.bsky.social challenge! 🥳🎉
We've released a small patch. If you were stuck on flag 3, please re-download files! Good time to practice your patch-diffing 👀
app.hackinghub.io/hubs/mother-...
We've released a small patch. If you were stuck on flag 3, please re-download files! Good time to practice your patch-diffing 👀
app.hackinghub.io/hubs/mother-...
November 14, 2025 at 2:03 PM
Congratulations to Bhavya for being the first to capture all 5 flags on my @hackinghub.bsky.social challenge! 🥳🎉
We've released a small patch. If you were stuck on flag 3, please re-download files! Good time to practice your patch-diffing 👀
app.hackinghub.io/hubs/mother-...
We've released a small patch. If you were stuck on flag 3, please re-download files! Good time to practice your patch-diffing 👀
app.hackinghub.io/hubs/mother-...
So, who's gonna blood my new @hackinghub.bsky.social challenge? 😼
Challenge 🔗 app.hackinghub.io/hubs/mother-...
First 3 solves will earn the "Hacker Cat" role in my discord server ➡️ discord.cryptocat.me
#ctf #capturetheflag #ethicalhacking #cybersecurity #infosec #offsec
Challenge 🔗 app.hackinghub.io/hubs/mother-...
First 3 solves will earn the "Hacker Cat" role in my discord server ➡️ discord.cryptocat.me
#ctf #capturetheflag #ethicalhacking #cybersecurity #infosec #offsec
November 13, 2025 at 2:52 PM
So, who's gonna blood my new @hackinghub.bsky.social challenge? 😼
Challenge 🔗 app.hackinghub.io/hubs/mother-...
First 3 solves will earn the "Hacker Cat" role in my discord server ➡️ discord.cryptocat.me
#ctf #capturetheflag #ethicalhacking #cybersecurity #infosec #offsec
Challenge 🔗 app.hackinghub.io/hubs/mother-...
First 3 solves will earn the "Hacker Cat" role in my discord server ➡️ discord.cryptocat.me
#ctf #capturetheflag #ethicalhacking #cybersecurity #infosec #offsec
The "Ultimate Calculator 3000" challenge is over! ⏳
You can watch the video walkthrough here ➡ youtu.be/lRJno96za5A
I'll leave everything online for another week or so 🙂
You can watch the video walkthrough here ➡ youtu.be/lRJno96za5A
I'll leave everything online for another week or so 🙂
Hidden Product Activation and Serial Keygen - "Ultimate Calculator 3000" [Rev/Web Challenge]
YouTube video by CryptoCat
youtu.be
October 30, 2025 at 2:13 PM
The "Ultimate Calculator 3000" challenge is over! ⏳
You can watch the video walkthrough here ➡ youtu.be/lRJno96za5A
I'll leave everything online for another week or so 🙂
You can watch the video walkthrough here ➡ youtu.be/lRJno96za5A
I'll leave everything online for another week or so 🙂
My writeup for the September Dojo challenge on @yeswehack.bsky.social - Chainfection ⛓
The challenge combined multiple CVEs, creating a chain of vulnerabilities: SQL injection -> file write + path traversal -> SSTI (RCE)
Read the full writeup ➡️ book.cryptocat.me/blog/ctf/mon...
The challenge combined multiple CVEs, creating a chain of vulnerabilities: SQL injection -> file write + path traversal -> SSTI (RCE)
Read the full writeup ➡️ book.cryptocat.me/blog/ctf/mon...
October 28, 2025 at 4:51 PM
My writeup for the September Dojo challenge on @yeswehack.bsky.social - Chainfection ⛓
The challenge combined multiple CVEs, creating a chain of vulnerabilities: SQL injection -> file write + path traversal -> SSTI (RCE)
Read the full writeup ➡️ book.cryptocat.me/blog/ctf/mon...
The challenge combined multiple CVEs, creating a chain of vulnerabilities: SQL injection -> file write + path traversal -> SSTI (RCE)
Read the full writeup ➡️ book.cryptocat.me/blog/ctf/mon...
I made a new CTF challenge! It will run until the 30th of October 🎃
There's no prizes, but the first 3 solves will earn themselves the "Hacker Cat" rank in my discord server 😸
Download "Ultimate Calculator 3000" to get started ➡ discord.cryptocat.me
There's no prizes, but the first 3 solves will earn themselves the "Hacker Cat" rank in my discord server 😸
Download "Ultimate Calculator 3000" to get started ➡ discord.cryptocat.me
October 22, 2025 at 10:08 AM
I made a new CTF challenge! It will run until the 30th of October 🎃
There's no prizes, but the first 3 solves will earn themselves the "Hacker Cat" rank in my discord server 😸
Download "Ultimate Calculator 3000" to get started ➡ discord.cryptocat.me
There's no prizes, but the first 3 solves will earn themselves the "Hacker Cat" rank in my discord server 😸
Download "Ultimate Calculator 3000" to get started ➡ discord.cryptocat.me
Reposted by CryptoCat
Recapping Day One of #Pwn2Own Ireland 2025. Join @dustinchilds.bsky.social (and Maude) as he covers the highlights of the first day of the competition. We awarded $522,500 for 34 unique 0-day bugs, and more is to come. youtu.be/tiM_StSFvow
Recapping Day One of Pwn2Own Ireland 2025
YouTube video by Trend Zero Day Initiative
youtu.be
October 22, 2025 at 8:15 AM
Recapping Day One of #Pwn2Own Ireland 2025. Join @dustinchilds.bsky.social (and Maude) as he covers the highlights of the first day of the competition. We awarded $522,500 for 34 unique 0-day bugs, and more is to come. youtu.be/tiM_StSFvow
Reposted by CryptoCat
We just posted our AttackerKB @rapid7.com Analysis for the recent Cisco 0day chain; CVE-2025-20362 and CVE-2025-20333. Full technical root cause analysis of both the auth bypass and buffer overflow are here: attackerkb.com/topics/Szq5u...
CVE-2025-20362 | AttackerKB
On September 25, 2025, Cisco published advisories for two new vulnerabilities, CVE-2025-20362, and CVE-2025-20333, which are known to be exploited in-the-wild …
attackerkb.com
October 6, 2025 at 8:38 AM
We just posted our AttackerKB @rapid7.com Analysis for the recent Cisco 0day chain; CVE-2025-20362 and CVE-2025-20333. Full technical root cause analysis of both the auth bypass and buffer overflow are here: attackerkb.com/topics/Szq5u...
New video looking at some interesting printer vulnerabilities, found by @stephenfewer.bsky.social (@rapid7.com) 🖨
▶ youtu.be/--SaQKmcyiU
▶ youtu.be/--SaQKmcyiU
Print Scan Hacks: Understanding the 8 CVEs Impacting Brother Printers
YouTube video by CryptoCat
youtu.be
September 25, 2025 at 1:08 PM
New video looking at some interesting printer vulnerabilities, found by @stephenfewer.bsky.social (@rapid7.com) 🖨
▶ youtu.be/--SaQKmcyiU
▶ youtu.be/--SaQKmcyiU
One week until @bsidesbelfast.bsky.social, Who's going? 👀
As always, I've got stickers - come say hi! 👋
As always, I've got stickers - come say hi! 👋
September 4, 2025 at 2:46 PM
One week until @bsidesbelfast.bsky.social, Who's going? 👀
As always, I've got stickers - come say hi! 👋
As always, I've got stickers - come say hi! 👋
Video walkthrough for the "Fancy Login Form" web challenge from the @why2025.bsky.social CTF 🚩
Learn how to exfiltrate data via CSS injection ➡️ youtu.be/jUjlj2z5jJk
Learn how to exfiltrate data via CSS injection ➡️ youtu.be/jUjlj2z5jJk
August 14, 2025 at 6:57 PM
Video walkthrough for the "Fancy Login Form" web challenge from the @why2025.bsky.social CTF 🚩
Learn how to exfiltrate data via CSS injection ➡️ youtu.be/jUjlj2z5jJk
Learn how to exfiltrate data via CSS injection ➡️ youtu.be/jUjlj2z5jJk
Played the @why2025.bsky.social CTF over the weekend 💜 Here's some web challenge writeups 👇
book.cryptocat.me/ctf-writeups...
book.cryptocat.me/ctf-writeups...
Web | CTF Writeups
book.cryptocat.me
August 12, 2025 at 3:50 PM
Played the @why2025.bsky.social CTF over the weekend 💜 Here's some web challenge writeups 👇
book.cryptocat.me/ctf-writeups...
book.cryptocat.me/ctf-writeups...
Famous beef noodle soup (broth simmering continously for over 50 years!) in one of my all time favourite cities - Bangkok! 🇹🇭 Any hackers here wanna hang out, hmu 🤙
July 1, 2025 at 7:48 AM
Famous beef noodle soup (broth simmering continously for over 50 years!) in one of my all time favourite cities - Bangkok! 🇹🇭 Any hackers here wanna hang out, hmu 🤙
I've done a lot of awesome hacker meetups but this one was next level! So nice to meet brutecat, dreyand and IDlSSEVERYTHING🔥 These guys have some crazy skills (and stories), hope to meet again in the future 💜
June 28, 2025 at 9:34 AM
I've done a lot of awesome hacker meetups but this one was next level! So nice to meet brutecat, dreyand and IDlSSEVERYTHING🔥 These guys have some crazy skills (and stories), hope to meet again in the future 💜
I'll be in Singapore this weekend! I know there's lots of cool hackers there so hmu if you wanna get some coffee/food/drinks 🥰
June 26, 2025 at 8:07 AM
I'll be in Singapore this weekend! I know there's lots of cool hackers there so hmu if you wanna get some coffee/food/drinks 🥰