Decoding QR Codes with Python
In diary entry "Sextortion Email Variant: With QR Code", I had to decode a QR code. I didn't mention it in my diary entry, but I used an online service to decode the QR Code (I didn't want to use my smartphone).
But what if you don't want to use any online service?
You can also use a Python module: python-qrtools. I installed it on Ubuntu 18 with the following command:
sudo apt-get install python-qrtools
And then I used a simple Python program like this one:
import sys
import qrtoolsqr = qrtools.QR()
print(qr.decode(sys.argv[1]))
print(qr.data)
We received the sextortion email with QR code as a .msg file. These files can be analyzed with oledump.py:
Plugin plugin_msg can help with locating the streams that contain the attachments (images):
The beginning of the content of the attachment data streams indicates that these are .png files: \x89PNG.
Grepping for PNG reveals that stream 3, 11 and 19 contain the .png files:
Extracting the .png attachments to disk:
Decoding the QR code:
Images 1 and 2 don't contain a QR code (False), but image 3 does (True), and the Bitcoin address is displayed.
Didier Stevens
Senior handler
Microsoft MVP
blog.DidierStevens.com DidierStevensLabs.com
Comments
Anonymous
Dec 3rd 2022
9 months ago
Anonymous
Dec 3rd 2022
9 months ago
<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.
<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission
Anonymous
Dec 26th 2022
8 months ago
Anonymous
Dec 26th 2022
8 months ago
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
8 months ago
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
8 months ago
Anonymous
Dec 26th 2022
8 months ago
https://defineprogramming.com/
Dec 26th 2022
8 months ago
distribute malware. Even if the URL listed on the ad shows a legitimate website, subsequent ad traffic can easily lead to a fake page. Different types of malware are distributed in this manner. I've seen IcedID (Bokbot), Gozi/ISFB, and various information stealers distributed through fake software websites that were provided through Google ad traffic. I submitted malicious files from this example to VirusTotal and found a low rate of detection, with some files not showing as malware at all. Additionally, domains associated with this infection frequently change. That might make it hard to detect.
https://clickercounter.org/
https://defineprogramming.com/
Dec 26th 2022
8 months ago
rthrth
Jan 2nd 2023
8 months ago