More COVID-19 Themed Malware
Reader Andrew received a COVID-19 themed email with malicious attachment, and submitted the complete email.
My tool emldump.py reports the different parts:
The email body is a fake message from criminals cautioning their victims that documents are required to leave their house during a "National State of Emergency", which are conveniently attached to the email:
The attachment is a ZIP file. Analysis with zipdump.py:
The ZIP file contains a single VBScript file:
This long BASE64 string can be easily analyzed with base64dump.py:
This is another script with more BASE64, but reversed (notice VBScript function StrReverse). I reverse it with python-per-line.py and decode it with base64dump.py:
This PowerShell script downloads 3 files. The files were no longer up when I took a look at this sample, but handler Jan was quicker and gave me the files.
The 3 files are:
- A bening, legitimate and signed PE file: AutoIt interpreter
- A malicious, obfuscated AutoIt script, masquerading as a certificate
- A file with a very high entropy (probably encrypted)
As you can guess, after downloading these files, the AutoIt script is decoded (with certutil) and then executed with the downloaded AutoIt interpreter.
I'm still busy with the static analysis of these files, but a dynamic analysis reveals that the AutoIt script will read the encrypted file and then attempt to connect to servers krt1[.]site, krt2[.]site and krt3[.]site.
These sites too are no longer active, but a quick search reveals that this is the KPOT infostealer.
Didier Stevens
Senior handler
Microsoft MVP
blog.DidierStevens.com DidierStevensLabs.com
Comments
Anonymous
Dec 3rd 2022
10 months ago
Anonymous
Dec 3rd 2022
10 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
9 months ago
Anonymous
Dec 26th 2022
9 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
9 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
9 months ago
Anonymous
Dec 26th 2022
9 months ago
https://defineprogramming.com/
Dec 26th 2022
9 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
9 months ago
rthrth
Jan 2nd 2023
9 months ago