About a month ago, I added a couple shell scripts to my DFIR Github repository. Three of the four scripts are used at work daily in either a Linux terminal, or a Cygwin terminal. The fourth script is something I use to help with quarantined mail, and not really DFIR based.
b64Decode.sh and hexConvert.bash take command line arguments and reports back the result. For example:
The first extractor script, xHttpExtractor.py came about from a web based tool I used. It would run on a file uploaded to it, and then list a bunch of indicators, system artifacts, url calls outs, network communication, etc. However the tool didn’t have a good export mechanism at the time. So I would copy and paste everything to a text file, and then extract the url host details from the text files. Mainly so I could add the URL indicators to the web proxy.
I re-wrote a script I use at work. It was a messy bit of Python 3 previously. While it’s still not the cleanest of python scripts, it scratches my itch. It was originally just a straight line of commands with lots of repeated code. I made some functions and made it a little more modular. I know I need to learn PEP8, and start following it. This was just to improve something that I wrote previously with things I learned from Automate the Boring Stuff with Python.
I’ve shared it via my GitHub repository for DFIR scripts. They’re clean (not tied to any company). There is only Computer Ping for right now. There are 3 scripts all based on the same idea.
Ping a computer, if it is down, keep trying every 10 minutes for 1 hour. Pop an “alert” if the target is up, or the script finished before it came up.
1 version for Windows running python (wComputerPing.py)
1 version for Windows running Cygwin (cwComputerPing.py)
1 version for boxes running Linux. (lComputerPing.py).
I’ll write others and upload to the repository as I have time / re-write stuff I use. They might not all be Python, but my goal is to be more Python than not.
I’m working through Violent Python. I’m still working on the Automating Python stuff to, but that requires WingIDE and I only have 1 license for that. Which means run on a VM at home.
Violent Python suggested an IDE at the beginning, but the examples are written in a way (at least in the first 2 chapters) so I can SSH to my multi-purpose server and do everything via VIM and the CLI.
A few months ago, a friend and co-worker asked if I had seen Automating OSINT. I hadn’t, so I went and checked it out and end up signed up for the free webinar. Turns out I had just missed the previous one by a few hours. And had some time to wait before the next one.
I’ve been wanting to expand beyond just bash scripting for most of my career. I tried learning Perl, and then I tried Python. The Google Python class, the MIT Python Class, Learn Python the Hardware, Think Python, Automate the Boring stuff with Python, and buying Python courses from Boing Boing. Problem is I never finished any of them. I think because I lose interest, and have other things to do.