Ross Marks
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Category Archives: Security

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Critically Insecure Router

Posted on March 16, 2025 by Ross Marks
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I wanted to create a hardware pentesting sample report so when clients ask for a sample report I’m not giving them a web app one and saying “It’s like this but different”. I knew a cheap router from china would … Continue reading →

Posted in Electronics, Security | Leave a reply

Side Channel Timing Attack

Posted on February 11, 2025 by Ross Marks
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I decided to have a play with some side channel analysis attacks, What seemed like the easiest to attempt is a timing attack, so here is my findings. All the code for this is available at https://rossmarks.uk/git/0xRoM/Hardware in the “/SideChannel/ATtiny85_Timing_Attack” … Continue reading →

Posted in Electronics, Security, Tutorial | Leave a reply

Breaking a smart lock

Posted on October 25, 2019 by Ross Marks
1

For this post we will be playing with the following: Once it arrived the first thing to do was to download the app (playstore link) connect the device, lock and unlock it a few times. It was fairly trivial and … Continue reading →

Posted in Bluetooth, Electronics, Security, Tutorial | 1 Reply

Reversing an ATtiny85

Posted on October 15, 2019 by Ross Marks
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I wanted to give a quick demo on how to reverse engineer an ATtiny85 micro-controller to read the code stored on the device. For this demo the “hello world” is a small circuit with four buttons. By typing in the … Continue reading →

Posted in Electronics, Security, Tutorial | Leave a reply

Akord / Nexx Router fun

Posted on August 19, 2019 by Ross Marks
1
nexx_router

So again, I got a cheap and nasty router from Amazon: Firstly it came without instructions, but on the bottom it has it’s default IP and credentials: Going to the IP in a web browser your presented with the most … Continue reading →

Posted in Electronics, Security | 1 Reply

BLE CTF Walkthrough

Posted on February 13, 2019 by Ross Marks
1
BLE Logo

So a pentest friend came over that I hadn't seen in a while, and as always we had an evening of nerding out, one of the many takeaways from this was he gave me a small device and a link … Continue reading →

Posted in Bluetooth, Security, Tutorial | 1 Reply

Vulnhub: Resimler: BTRSys v2.1

Posted on October 5, 2017 by Ross Marks
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vulnhub

OK one last Vulnhub VM for today, this time is the second in the series: Resimler: BTRSys v2.1, This one is a bit more difficult than the previous, but only marginally. Getting this VM up and running is a pain,  first … Continue reading →

Posted in Security, Tutorial | Leave a reply

Vulnhub: Resimler: BTRSys v1

Posted on October 5, 2017 by Ross Marks
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vulnhub

Wow two in one day! It must be a record… or the fact I am ill, either way here’s another write-up. This time I will be doing Resimler: BTRSys v1, It’s a fairly straight forward Boot2Root and for people familiar to these … Continue reading →

Posted in Security, Tutorial | Leave a reply

Vulnhub: LazySysAdmin: 1

Posted on October 5, 2017 by Ross Marks
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vulnhub

Back once again with another vulnhub writeup, you guys seem to like these and a load of new VM’s were added that currently don’t have any. As you can tell by the title this one is for “LazySysAdmin: 1” My … Continue reading →

Posted in Security, Tutorial | Leave a reply

Protecting your-cyber-self

Posted on August 18, 2017 by Ross Marks
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computer-condom

Some of my friends have recently noticed the “snoopers charter” and taken interest on protecting their digital selves. I’m hoping this can help them or anyone else interested on how to accomplish at least a bit of this. Not only … Continue reading →

Posted in Security | Leave a reply

Simple CAPTCHA issue

Posted on June 23, 2017 by Ross Marks
1
captcha

So a friend of mine is working on a CAPTCHA solving program. I can't go into the details here as it's not my work therefore it's not up to me to disclose. This did peak my interest slightly as I … Continue reading →

Posted in Security, Tutorial | 1 Reply

Vulnhub: Proteus

Posted on June 9, 2017 by Ross Marks
5
vulnhub

So here is my write up for the vulnhub challenge “Proteus” which can be downloaded from: https://www.vulnhub.com/entry/proteus-1,193/ This interested me as there is no walkthrough as it was released two days ago, and was a straight forward boot to root. Nice … Continue reading →

Posted in Linux, Security | 5 Replies

Android App – “Random Adventure”

Posted on March 3, 2017 by Ross Marks
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android_crossbones

It’s no secret that I’m a fan of old-school ASCII rouguelikes, I run a UnNethack server – guis.es. Being on the android binge that I’m currently enjoying I decided to have a play with one of these from the play … Continue reading →

Posted in Android, Security | Leave a reply

Setting up an Iodine server

Posted on March 2, 2017 by Ross Marks
12
iodine

What is Iodine? Basically it’s a server that allows you to tunnel traffic through DNS Why would I want this? There are multiple uses for this, the ones that come to mind are: – Get free internet from paid wifi … Continue reading →

Posted in Security, Tutorial | 12 Replies

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