Didier Stevens

Sunday 25 April 2021

isodump.py

Filed under: My Software,video — Didier Stevens @ 10:13

This is a new tool (beta) to analyze ISO files. I made this for a webinar I presented: a demo on how to use my templates to create your own tools.

isodump.py is in my Github beta repository.

The complete webinar is here, if you want to jump directly to the demo where I explain how to make a tool like isodump.py, go here.

Tuesday 19 January 2021

Video: Maldoc Analysis With CyberChef

Filed under: maldoc,Malware,video — Didier Stevens @ 0:00

In this video, I show how to analyze a .doc malicious document using CyberChef only. This is possible, because the payload is a very long string that can be extracted without having to parse the structure of the .doc file with a tool like oledump.py.

I pasted the recipe on pastebin here.

Thursday 24 December 2020

Video: Using numbers-to-string.py To Analyze FireEye Maldocs

Filed under: My Software,video — Didier Stevens @ 0:00

I created a video where I use my updated numbers-to-string.py tool to analyze a maldoc created with FireEye’s red team tool.

Sunday 2 August 2020

Videos: Defective USB Cable

Filed under: Hardware,video — Didier Stevens @ 0:00

When I had issues with my portapack, it took me some time to remark that these issues only happened with a particular USB cable.

The SDR would work fine, and then when I would try to record or playback, the screen would turn dark.

You can see this in the following video:

What is happening, is that this particular USB cable is electrically defective: the voltage drop is too large, due to the abnormally high resistance of the cable. The portapack doesn’t receive enough power, and starts to malfunction.

In the following 2 videos, I perform various tests with that defective cable:

Videos on my video blog (with some info on the devices I used):

Saturday 4 April 2020

Video: GNU Radio Companion: Acoustic Beats

Filed under: technology,video — Didier Stevens @ 13:39

In this video, I use GNU Radio Companion (without SDR) to illustrate the acoustic beat phenomenon.

I mention a 400Hz dial tone in this video, but this will vary by country.

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