crumberry@lab:~$ signal steady

crumberry

offensive security · vulnerability research · exploit development

> about 01

I’m an offensive security operator and infrastructure hacker. I break into systems on paper first, then for real, then write down exactly how — so somebody can close the hole.

Penetration testing, vulnerability research, red team tooling, and the unglamorous hardening work that stops the next one. Everything reproducible. Nothing decorative.

> focus 02

web & api

Authentication, access control, injection, and the business logic nobody wrote down.

infrastructure

Network, directory, containers and cloud. The path that runs through the boring bits.

red team

Initial access through objective, with the detection gaps mapped on the way out.

vulnerability research

Source review and fuzzing. A proof of concept, or it didn’t happen.

hardening

nftables, systemd, auditd, least privilege. The half of the job that stays up.

lab automation

Disposable targets and reproducible builds, so a result can be re-run and re-proven.

> arsenal 03

recon

  • nmap
  • masscan
  • amass
  • subfinder
  • ffuf
  • gobuster

exploit

  • Burp Suite
  • ZAP
  • nuclei
  • searchsploit
  • Metasploit

post

  • linPEAS
  • BloodHound
  • hashcat
  • john

infra

  • Docker
  • KVM / libvirt
  • nftables
  • Tailscale
  • Cloudflare
  • Trivy

> lab 04

Everything runs on my own iron: Ubuntu, Docker, Tailscale. Targets are KVM guests on segregated libvirt networks with default-deny egress, snapshotted before every run.

The lab gets rebuilt, not repaired. A target that has been touched once is a target that lies.

> signal 05

mmxxvi > EOF