This article describes the analysis of data exfiltration using blockchain as it was used in a challenge for the CSCBE 2018 qualifiers. The Cyber Security Challenge Belgium (CSCBE) is a typical Capture-The-Flag (CTF) competition aimed at students from universities and colleges all over Belgium. All of the CSCBE’s challenges are created by security professionals from many different organisations. … Continue reading Write-up on Blockchain data exfiltration (CSCBE18 qualifiers) challenge →

About the CSCBE The Cyber Security Challenge Belgium (CSCBE) is a typical Capture-The-Flag (CTF) competition aimed at students from universities and colleges all over Belgium. All of the CSCBE's challenges are created by security professionals from many different organisations.  The "Modbusted" challenge was created by Jonas B, one of NVISO's employees. First, some statistics about the Modbusted … Continue reading How CSCBE’s “Modbusted” challenge came to be →

The Sufbo challenge was tackled during the Cyber Security Challenge qualifiers and proved to be very difficult to solve. This write-up gives you a possible way of solving it! Credits All challenges of the Cyber Security Challenge are created by security professionals from many different organisations. The Sufbo challenge in particular was created by Adriaan Dens, … Continue reading CSCBE Challenge Write-up – Sufbo →

This is the first post in a series of write-ups on some of the challenges that were tackled by students during our Cyber Security Challenge Belgium this month. Credits All challenges of the Cyber Security Challenge Belgium are created by security professionals from many different organisations. The TraceMe challenge in particular was created by Vasileios Friligkos, one … Continue reading CSCBE Challenge Write-up – Trace Me →