ruysal.com

Posts

1 Nov 2026

Disrupting Contagious Interview

Platform-level threat intelligence on Contagious Interview, covering attacker infrastructure, tradecraft, and our efforts to disrupt the campaign. Includes 1,000+ IOCs.

19 min read
11 Mar 2022

Windows Dead Box (Disk Image) Forensics

My notes on finding and analyzing useful DFIR artifacts in a Windows disk image.

19 min read
26 Nov 2020

Reverse Engineering: Malware Analysis of Ursnif

Following an Ursnif sample from its first execution through unpacking and process injection.

15 min read
23 Jan 2019

Combining Multiple Design Patterns in Java

Design patterns in a mock system built with Java.

7 min read
19 Nov 2017

Page Tables, Implementing Shebang, and Integer Overflow in Xv6

Notes on page tables, shebang handling, and integer overflow exercises in the xv6 operating system.

8 min read