Rafael F
Offensive Security Researcher & Partner at Hakai Security
São Paulo, Brazil
Summary
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SeniorRafael F is an Offensive Security Lead and Partner with a decade of experience specializing in low-level Windows internals, exploit development, and offensive tooling primarily written in Rust. He leads offensive development teams at Hakai Security and has a strong background in malware analysis, incident response, and purple-team adversary emulation using tools like MITRE Caldera and Prelude Detect. Rafael has contributed notable open-source work to the malware development community—most prominently Coffee, a COFF loader in Rust—and is credited on CVE-2024-21338 for an admin-to-kernel exploit that bypasses multiple Windows protections. Comfortable across C, C++, Go, Assembly, Python and JavaScript, he combines hardware-hacking curiosity with practical evasion techniques aimed at defeating EDRs. Based in São Paulo, he blends research-level understanding of OS internals with hands-on red-team leadership and a strong interest in privacy and unconventional technologies.
10 years of coding experience
2 years of employment as a software developer
Portuguese, English
Github Skills (178)
minecraft10
coff10
firmware10
bluetooth10
esp3210
backend10
scanner10
espressif10
dotnet10
blueteam10
steam10
surveillance10
dll10
clicker10
ffmpeg10
Programming languages (16)
Github contributions (5)
b1scoito/external
Apr 2022 - Feb 2023
External CS:GO cheat made in modern C++ with basic features
Contributions:189 commits, 49 PRs, 147 pushes in 9 months
cppgocsgo-external
b1scoito/cozinha_loader
Mar 2021 - Aug 2022
An injector focused on undetectability that automatically injects a DLL into the target process with VAC3 bypass.
Contributions:15 releases, 38 commits, 35 pushes in 1 year 5 months
dllvac-bypasscsgo-loaderdll-injectionsteam
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