Sreehari P J
Security Researcher & Systems Student
Offensive security enthusiast pivoting to low-level systems engineering. Currently exploring Linux Kernel internals and eBPF to build better defensive tooling.
Currently
ReadingLinux Kernel Development — Robert Love
BuildingeBPF-based process anomaly detector
LearningRust for systems programming
LocationKerala, India
Selected Projects
2025rekd
Go · eBPF · C
eBPF-based process anomaly detector. Attaches fentry probes to vfs_write, scores entropy, and SIGKILLs high-entropy writers.
Writing
2025
We Built a Ransomware Detector That Lives Inside the Linux Kernel
How Spider's cybersecurity team built REKD — an eBPF engine that hooks the VFS layer, scores write entropy in real-time, and kills ransomware processes before encryption finishes.
2025
How I Found a 150GB Data Leak on a Dating App (Without Even Having an Account)
A story of idle curiosity, a CloudFront XML page, and an unauthenticated S3 bucket exposing 150GB of user data from knot.dating.
2025
How I Found an Indonesian Gambling Site on .nitt.edu
Subdomain enumeration, a forgotten sports fest, and a dangling DNS that somehow survived years
Tools
C/C++GoRusteBPFLinux Kernel