Introverted Bytes

The Ultimate Guide: Deploying Greenbone OpenVAS Remote Scanners

Mon, 01 Dec 2025 00:00:00 +0000

A production-ready deployment guide for Greenbone Community Edition with Remote OSP Sensors using Docker, mutual TLS, and a custom Certificate Authority.

About Me — Kasyap Girijan

Sun, 26 Nov 2023 00:00:00 +0000

Hi, Kasyap here
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I’m a cybersecurity practitioner and technology explorer - curious about how systems really work beneath all the abstractions. I love dissecting networks, applications, APIs, and automations to understand their internals, uncover weaknesses, and engineer better defenses.

I Built a Secure OpenVAS Scanning Pipeline: Architecture, 1,150 Results, and Five Manual Validations

Sat, 04 Jul 2026 00:00:00 +0000

Part 2 of the OpenVAS remote-scanner build: a segmented lab, mTLS-protected OSP, 1,150 scan results, and five manual validations.

Hack The Box | Editor Writeup

Sat, 06 Dec 2025 20:30:00 +0530

A walkthrough for the “Editor” machine on Hack The Box, detailing the exploitation of XWiki RCE (CVE-2025-24893) and leveraging a Netdata ndsudo vulnerability (CVE-2024-32019) for root privilege escalation.

Hack The Box | BoardLight Writeup

Fri, 27 Sep 2024 23:00:00 +0530

A walkthrough for the “BoardLight” machine on Hack The Box, detailing the steps taken to compromise the target.

Exploring TLS: Securing TCP Communication

Sat, 21 Sep 2024 23:00:00 +0530

An educational guide explaining how Transport Layer Security (TLS) works to encrypt and secure TCP network communications.

Hack The Box | Devvortex Writeup

Sat, 27 Apr 2024 21:00:00 +0530

A solution guide for the “Devvortex” challenge on Hack The Box, covering the exploitation path from user to root.

Hack The Box | Codify Writeup

Sat, 06 Apr 2024 23:00:00 +0530

A step-by-step writeup for the “Codify” box on Hack The Box, demonstrating the vulnerabilities exploited to gain access.

Demystifying Nmap Scans: A Deep Dive into Network Exploration

Sun, 31 Mar 2024 23:00:00 +0530

An in-depth look at Nmap scanning techniques, helping readers understand how to effectively map and analyze networks.

Hack The Box | Analytics Writeup

Sat, 23 Mar 2024 23:00:00 +0530

A walkthrough for the “Analytics” machine on Hack The Box, demonstrating how to exploit a Metabase Pre-auth RCE (CVE-2023-38646) and leverage the “GameOverlay” kernel vulnerability to gain root access.

Hack The Box | Manager Writeup

Sat, 16 Mar 2024 23:00:00 +0530

A walkthrough for the “Manager” machine on Hack The Box, covering RID cycling and password spraying against MSSQL, retrieving credentials via xp_dirtree, and exploiting AD CS ESC7 to escalate privileges to Domain Admin.

Hack The Box | Builder Writeup

Fri, 15 Mar 2024 23:00:00 +0530

A walkthrough for the “Builder” machine on Hack The Box, demonstrating the exploitation of a Jenkins arbitrary file read vulnerability (CVE-2024-23897) to retrieve credentials and the decryption of stored SSH keys via the Script Console for privilege escalation.

Hack The Box | CrazyHosting Writeup

Sat, 02 Mar 2024 23:00:00 +0530

A guide for the “CrazyHosting” machine on Hack The Box, covering how to hijack a user session via exposed Spring Boot Actuator endpoints, achieve command injection for a reverse shell, and escalate privileges using SSH configuration vulnerabilities.

Hack The Box | Keeper Writeup

Sat, 10 Feb 2024 00:00:00 +0530

A walkthrough for the “Keeper” machine on Hack The Box, covering default credential exploitation in Request Tracker, extracting a KeePass master password from a memory dump, and converting PuTTY keys to gain root access.

Hack The Box | Broker Writeup

Fri, 02 Feb 2024 23:00:00 +0530

A walkthrough for the “Broker” machine on Hack The Box, detailing the exploitation of Apache ActiveMQ (CVE-2023-46604) and privilege escalation via a custom Nginx configuration to gain root access.

Home Lab Series | Part 2 | Hardening SSH login

Sat, 02 Dec 2023 15:00:00 +0530

A step-by-step tutorial on securing remote access to your Raspberry Pi by implementing key-based authentication, enforcing role-based access control, and optimizing sshd_config parameters.

Home Lab Series | Part 1 | First Boot with Raspberry Pi

Sun, 26 Nov 2023 11:00:00 +0530

A foundational guide for the Home Lab series detailing the setup of a Raspberry Pi with Raspberry Pi OS Lite, including headless configuration and SSH enablement using the official Imager.

Now

Mon, 01 Jan 0001 00:00:00 +0000

Current Focus
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Application Security engineering
Cloud security learning path
AWS Solutions Architect preparation
Security automation and reporting pipelines
Mobile application security research
Local LLM and ComfyUI experimentation

Building
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OpenVAS remote scanner improvements
Homelab infrastructure and observability
AI-assisted creative workflows
Technical writing and security architecture documentation

Exploring
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Security leadership and AppSec strategy
Detection engineering workflows
AI + Security operational workflows
Photography and cinematic visual systems

Primary 2026 Focus
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Building deep practical expertise in Mobile Application Security and AppSec automation.