Ophir Harpaz – Medium

Apr 25, 2019

Attaching to Windows Kernel with KDNET — a Short Guide

Recently, I’ve been working on a task at work which required debugging a malicious Windows driver. To be able to do so, I had to set up a… — Recently, I’ve been working on a task at work which required debugging a malicious Windows driver. To be able to do so, I had to set up a kernel-debugging environment — attach a debugger on my host to a target machine’s kernel. …

Windows 10

5 min read

Attaching to Windows Kernel with KDNET — a Short Guide

Mar 28, 2019

MongoDB Basic Document Grouping

How to group entire MongoDB documents based on a certain field — This post serves as a note-to-self; it details a technical problem I had and which took me forever to overcome, or so it felt. Frustration level was high and Twitter is my witness. Once solved, I couldn’t let the solution be forgotten and so I decided to carve it…

Database

3 min read

Nov 21, 2018

From A to W: Character Conversion in Windows API

What For? — What For? If you’ve ever written, read or reversed a Windows application you probably know that many Windows API functions have both an ANSI version (SomeFunctionA) as well as a Unicode version (SomeFunctionW). Not too long ago, I read that many Windows “A” functions end up calling their corresponding “W” versions, after…

Reverse Engineering

6 min read

From A to W: Character Conversion in Windows API

Jul 22, 2018

A Summary of x86 String Instructions

I have never managed to memorize all of x86 Assembly’s string instructions — so I wrote a cheat sheet for myself. Then I thought other… — I have never managed to memorize all of x86 Assembly’s string instructions — so I wrote a cheat sheet for myself. Then I thought other people may find it useful too, and so this cheat sheet is now a blog post. This is what you’ll find here: The logic behind…

Assembly Language

5 min read

Jun 21, 2018

5+1 Reasons Why You Need to Go to REcon

Two months ago, my dear friend Carine-Belle sent me a tweet by Women In Tech Fund. The organization was giving five tickets to REcon — an… — Two months ago, my dear friend Carine-Belle sent me a tweet by Women In Tech Fund. The organization was giving five tickets to REcon — an annual reverse engineering conference held in Montreal — to five women whom they would find most suitable. I decided to give it a shot…

Conference

5 min read

Apr 13, 2018

Put The Flags Out! — Hacking Minesweeper

Background — Background Two weeks from today, the first Low Level & Security Celebration will take place. This event is organized by Baot and its goal is to attract more women into the low level and security fields. I was given the amazing yet terrifying task of teaching the Reverse Engineering workshop. When…

Reverse Engineering

6 min read

Put The Flags Out! — Hacking Minesweeper

Published in Extend

·Jul 29, 2017

Installing IP Cameras or How I started monitoring my cats

In short: How to install and setup a network camera that is reachable from outside your private network. — In short: How to install and setup a network camera that is reachable from outside your private network. Intro I was never the one to handle connections, cables and routers, until I decided to start watching my two cats while at work (hopefully my boss isn’t reading this). My boyfriend insisted…

Networking

6 min read

Installing IP Cameras or How I started monitoring my cats