Insomni’hack 2023 CTF Teaser – DoH ! writeup

For this 2023 edition, i chose to focus on the DoH (DNS Over Https) protocol because it has gained popularity for attackers as a command and control (C2) communication channel for hiding DNS traffic through HTTPS rather than using the traditional DNS tunneling. In this post, i will describe in details how to solve the challenge.

Continue reading Insomni’hack 2023 CTF Teaser – DoH ! writeup

Insomni’hack 2023 – hex-filtrate writeup

In this forensic challenge, a company has been compromised and their initial investigation led to a suspicious workstation. The CEO was very anxious about a potential exfiltration, and we were provided with a network dump of that workstation in the hope that we would be able to help him make some sweet dreams again.

Continue reading Insomni’hack 2023 – hex-filtrate writeup

Attacking Android Antivirus Applications

Although the usefulness of security tools such as Antivirus, VPN and EDR is now indisputable in business circles, these solutions often need a lot of privileges and permissions to work properly, also making them an excellent target for an attacker. The presence of a bug in one of these types of solutions could allow a malware to elevate its privileges and cause more damage to the organization.

Continue reading Attacking Android Antivirus Applications

Producing a POC for CVE-2022-42475 (Fortinet RCE)

Late last year a new remote code execution vulnerability was discovered in Fortinet’s SSLVPN service. Given the relative lack of information surrounding it at the time, and the fact I’d have some uninterrupted research time due to a lengthy flight, I decided to attempt to produce a POC for the vulnerability.

Continue reading Producing a POC for CVE-2022-42475 (Fortinet RCE)