Frederik Reiter

About:

Frederik Reiter is the author of frereit's blog, a personal blog about computer science, cyber security, and various topics of interest.

Website:

frereit.de

Specializations:

Computer Scientist Cybersecurity Expert

Outgoing Links:

Nikita Prokopov

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2025-01-28 •

The text is a writeup of the 'rusty_rev' challenge, a Rust reverse engineering challenge for the HackDay 2025 Qualifications CTF. It includes a dynamic analysis, anti-debugging techniques, static analysis, rehydrating the binary, ...

2024-11-07 •

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2024-11-07 •

The article discusses using Google Docs as a C2 proxy with a headless browser to avoid outbound traffic directly from the C2 agent to the C2 server. It explains how to use a headless browser process and the Chrome DevTools Protoco...

2024-06-09 •

The article discusses the security issues of AES-GCM when a nonce is reused. It explains how AES and GCM work, and how the encryption and authentication parts of GCM can be broken when a nonce is reused.

2024-03-03 •

The text discusses how to encode a Bootstring string, explaining the state machine and the process of inserting code points to encode an extended string to a basic string. It also provides an example of encoding the string “ciênci...

2024-03-02 •

The text explains the Bootstring algorithm, which is a way to encode arbitrary sequences of Unicode code points as a sequence of a smaller set of code points. It discusses the state machine at the heart of Bootstring, how to produ...

2024-01-01 •

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