Introduction
This month, we're looking back at moments that brought the cybersecurity community together, from technical discussions at BSides Curitiba to our very own LESIS Happy Hour. We're also sharing new research from our team, exploring practical approaches to security testing.
Community
A look back at the LESIS Happy Hour
Our latest LESIS Happy Hour brought together friends, partners, researchers, and people from the security community for an evening in Rio de Janeiro. There were conversations, drinks, karaoke, photos, and plenty of good moments away from the usual conference rooms and screens.
Thanks to everyone who joined us and helped make the night special. We are already looking forward to the next one.
Take a look at some of the moments from the night.
Research & Articles
Working the cloud: IP rotation with serverless computing
In a new post on the LESIS Blog, Lucas Vieira Araujo introduces cf-proxy, a tool built from a practical need encountered during penetration testing.
The article explores how Cloudflare Workers can be used as a lightweight rotating proxy, changing the source IP between requests and helping in scenarios involving IP-based rate limits, blocked addresses, and network filtering. It also goes through how the tool works, the problem that led to its creation, and some of the limitations of using Cloudflare’s infrastructure this way.
Read the full article →LESIS at BSides CWB 2026
We were at BSides Curitiba 2026, where Heitor Gouvêa took the stage to talk about autonomous security testing and the challenges behind building AI systems that can be trusted in offensive security.
Beyond the talk, BSides was another opportunity to meet researchers, practitioners, and friends from across the community.
We brought back a few photos from Curitiba to share some of the moments from the event.
Learn more →
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Whether you're looking to assess your security posture, identify vulnerabilities, or strengthen your defenses, LESIS can help. We bring technical expertise and a research-driven approach to offensive security, tailored to your needs.
Let's talk about how we can work together.
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Closing
LESIS is an applied security research entity focused on developing effective offensive technologies in support of critical operations. Its approach is grounded in a thorough attacker’s perspective and rigorous, research-driven thinking
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