Ragnar Security

RT @_JohnHammond: But we could never forget about those Binary Exploitation buffs! In fact we've got something fun for you: @RagnarSecurity 's latest predicament: "So Much Cache!" Pwn this challenge and more at #NahamCon2024 CTF (5/23-5/25)

RT @_JohnHammond: Leveraging Netsh Helper DLLs for living-off-the-land code execution (and optional persistence), staged with shellcode for a Sliver C2 session! Showcases built with both C++ and Nim... and boy I love getting practice with Nim 👑

WittsEnd2 created a new article about one of the CTF challenges he wrote. It is a basic code injection challenge using ptrace!

RT @umdcsec: It's that magical time of year again - UMDCTF 2022!!! Starting March 4th check out some incredible challs from the folks at UMDCSEC! Visit for more details <3

WittsEnd2 wrote an article comparing vulnerabilities in Rust and C. Go check it out!

RT @0xDexter0us: How to make money and be successful in #infosec and #bugbounty without any knowledge and skills of hacking, coding. #bugbountytips #bugbountytip A thread. 🧵👇

RT @colinoflynn: Something to finish off 2021 with a bang for you: It's now possible to build a (mostly safe) #EMFI tool for ~$50. Details are in the new 'PicoEMP' repository, including gerbers + design decision notes. Inspired from my @hackaday remoticon talk!

RT @shmoocon: ShmooCon 2022 postponed to March 24-26. More information here:

WittsEnd2 is writing a series about developing baremetal firmware. He just completed his first article. You can read it here:

RT @_JohnHammond: I completed the Kerberoasting on an Open Fire challenge! Don't miss out on SANS #HolidayHack x @KringleCon

Interesting writeups from @cor_ctf challenge writers Will's Root and D3v17 on their challenges Fire of Salvation and Wall of Perdition (Linux Kernel Pwn CTF Challenges):

Ever wanted to know how the kernel security feature Seccomp works? WittsEnd2 will teach you and go through a CTF challenge involving Seccomp!

Interesting writeup from the Hack-A-Sat 2 Qualifiers CTF. This writeup is for the challenge Mars or Bust, which is an embedded reverse engineering challenge:

WittsEnd2 just posted part 3 of his reverse engineering bare-metal tutorial series. This tutorial goes into reading ARM assembly code and exploiting bare-metal firmware vulnerabilities.

WittsEnd2 just posted Part 2 of his Bare-Metal Firmware Reverse Engineering series:

WittsEnd2 just published a new article related to reverse engineering bare-metal kernel images using QEMU. Click here to read:

New reverse engineering CTF Challenge walkthrough from WittsEnd2 - Babymix from Dicegang ctf:

RT @MsftSecIntel: The attackers behind Solorigate detached the execution of the 2nd-stage payload, a custom Cobalt Strike loader, from the compromised binary’s process by creating an IFEO Debugger registry value for dllhost.exe and waiting for it run. ICYMI, our analysis:

WittsEnd2 created a blog post about why you should start learning Reverse Engineering: