Didier Stevens

Sunday 30 August 2020

Update: oledump.py 0.0.53

Filed under: My Software,Update — Didier Stevens @ 13:45

This new version of oledump.py has bug fixes, updates for -s and –raw -v options, plugins, and a bug fix for plugin_vbaproject.

Streams can now be select (-s –select) by name too. Make sure to include the single quotes:

oledump_V0_0_53.zip (https)
MD5: C26EB56580D65B2E856169A3EFC9BC03
SHA256: A10D90284F10C6D7811E2573049FE0F8315F04129846898C88E0184423988CD9

Sunday 23 August 2020

New Tool: XORSearch.py

Filed under: Announcement,My Software — Didier Stevens @ 19:42

XORSearch, written in C, is a tool of mine I started 10+ years ago. But more and more security tools don’t like it.

So I decided to stop adding new features to XORSeach in C, and start programming a Python version to implement new features. This is a work in progress.

For the moment, the Python version only supports XOR-encoding with a one-byte key, and can only search for printable content.

Take a look at my SANS ISC diary entry to see how I use it.

I will still maintain the C version: perform bug fixes and add new features that require the speed of compiled C.

But features like detecting printable content will normally be used on small files, and then speed is not an issue.

Sunday 16 August 2020

Update: numbers-to-string.py Version 0.0.10

Filed under: My Software,Update — Didier Stevens @ 8:39

This new version of numbers-to-string.py, a tool to extract numbers from text files and convert them to strings, adds a verbose option (-v –verbose).

Example:

Running this with verbose option shows which lines were selected for number extraction:

numbers-to-string_v0_0_10.zip (https)
MD5: C7B8985C5A7D856F68A88BBD491375E6
SHA256: 8CED403C795E9287DD1500C8A0EFBF41F8837BE112113D425A7F8C97D9D1A27E

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 1 August 2020

Overview of Content Published in July

Filed under: Announcement — Didier Stevens @ 0:00

Here is an overview of content I published in July:

Blog posts:

YouTube videos:

Videoblog posts:

SANS ISC Diary entries:

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