November 12, 2021

SpamLess WriteUp

In this post, I’m going to solve the SpamLess challenge from UUTCTF2021. It is about sending an email without being spam to [email protected] address. The mail server is served as a Tor’s hidden service.

Now the writeup …

The Challenge

I’ve described the needed tools and methods for solving the question in the following video. You can check my previous post about fetching a hidden service’s public key which is needed for solving this challenge.

SpamLess WriteUp – UUTCTF2021

If you have any question, you can reach me by email.

September 27, 2021

Android System Image Modification

I’ve recently read an article (actually a script) about modifying android system image HERE. Based on the script, I’ve write a new one at my GitHub in a repository named AndroidSystemModification.

March 23, 2021

Onion Tunnel: Proxy Every TOR Hidden Service on localhost

Onion Tunnel

Onion Tunnel is a simple tunnel app for tunneling every connection through TOR network. It is in my GitHub repository named OnionTunnel: https://github.com/mirsamantajbakhsh/OnionTunnel.

The idea of Onion Tunnel is taken from I2P. It opens a port on localhost for each Hidden Service but TOR does not have such thing. Instead, it opens a SOCKS5 Proxy to tunnel every connection through TOR.

This idea is great but it has a problem:

What if the application that wants to get traffic from TOR, does not support SOCKS5 proxy?

March 23, 2021

Obfuscapk: Obfuscate your APKs

AndroJava

Hi.

Recently, I was checking Obfuscation techniques in Android for one of my courses. I found out an academic repository on GitHub named Obfuscapk which is for obfuscating Android APKs. This is the paper of their work which you can study if you like.

November 30, 2020

NMAP in Android

AndroJava

In this post, I’m going to talk about my new library for using NMAP in any Android project. I’ve released the library in my GitHub and Bintray. Using the library, you can use NMAP on non rooted Android device.

November 22, 2020

TOR Android Library

In previous post, I’ve talked about compiling TOR from source in Android and added some helper libraries for starting and configuring TOR. In this post, I’ve created a library based on Tor Binary (version 0.4.4.0) and published in GitHub, JFrog and JitPack.

September 24, 2020

Compiling TOR in Android

Anonymity Networks

TOR Android Binary

April 27, 2020

Onion Balance v2: Beautiful Load Balancer in TOR

Onion Balance is a Load Balancer in TOR Anonymity Network

August 6, 2019

Creating Hidden Mail Service

Installing and Configure Hidden Mail Service over TOR

Previously, I’ve described how to run hidden mail service over TOR and how to connect to it using ThunderBird.

In this post, I’ve create a video demo of what I’ve told in the posts.

July 8, 2019

Broadcast Yourself Through Android

I previously created a “HiddenLiveCamera” library for Android. In Github, I’ve received an issue by geminird indicating that phone no responded. I described the reason and geminird asked for live audio stream.

In another post, I’ve wrote about broadcasting media files (such as mp3) using Mixxx and IceCast. In this post, I’ve write about my library and how to use it in Android projects in order to publish stream from Android. The code of the library is grabbed from CoolMic.

MST

The Challenge

Onion Tunnel