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christoffer

Christoffer Claesson

I am Christoffer Claesson, a professional security researcher from Sweden who spends his days (and many nights) on red teaming, security deep dives, and homelab experiments. This blog is my way of giving back to the community by sharing lessons, notes, and the occasional side project that grew bigger than planned.

Sweden •
9 posts •
Redteam Hardware

Its HiDIYous

Its HiDIYous, but it works!…

Christoffer Claesson Christoffer Claesson 1 min read
Security Redteam

Password audits

This is be a brief overview on why and how to perform a password audit on a windows domain.

Christoffer Claesson Christoffer Claesson 5 min read
Exploit-dev

ROPEmporium: 0-Ret2Win (64-bit)

Doing a series on ROP and ROPEmporium, starting out with a simple ret2win

Christoffer Claesson Christoffer Claesson 6 min read
Ctf

Valentine Writeup

Heartbleeds and dirty cows, i feel sorry for the creator!

Christoffer Claesson Christoffer Claesson 5 min read
Ctf

Falafel Writeup

My writeup of the Hack the box Falafel.

Christoffer Claesson Christoffer Claesson 7 min read
Ctf

Chatterbox Writeup

My writeup of the Hack the box Chatterbox.

Christoffer Claesson Christoffer Claesson 3 min read
Ctf

RSA Prime Decryption

Description and usage of a decryption script that I wrote for CTF Challenges.

Christoffer Claesson Christoffer Claesson 1 min read
Ctf

Nibbles Writeup

“My writeup of the Hack the box Nibbles box… Nibble nibble!”

Christoffer Claesson Christoffer Claesson 4 min read
Security

SDL: Bolt on or Built in?

Time is of the essence. Every day that a business is anything less then fully secure is a day exposed to hackers. It’s also another day that developers continue building applications without factoring

Christoffer Claesson Christoffer Claesson 3 min read
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