Windows Malware with VHD Extension
Windows 10 supports various virtual drives natively and can recognize and use ISO, VHD and VHDX files. The file included as an attachment with this email, when extracted appears in the email as a PDF but is is in fact a VHD file.
This email received this week with a zip file attachment, after extraction, contained a file with a VHD extension. Using Linux file command, identified the file as a Microsoft Disk Image.
Windows 10 File Browser Listing
File was submitted to Virustotal [1] for analysis with very little detection and was identified as a Trojan by two scan engines. Sandbox analysis also indicated it may try to detect the virtual machine to hinder analysis, analysis by sandbox was minimal. Sandbox indicated the original filename was 7zS.sfx.exe0 vs 938374740_pdf.vhd
Attempt to copy the file to Windows 10 Sandbox [2] crashed the system. A second attempt to copy the file resulted with the same outcome.
Indicators
filename: 938374740_pdf.vhd, 7zS.sfx.exe0
SHA256: ea9aca145f23464a7739c7b3b6a8f8c7ce65bdd6f868e0a87a65a9a1291ee960
[1] https://www.virustotal.com/gui/file/ea9aca145f23464a7739c7b3b6a8f8c7ce65bdd6f868e0a87a65a9a1291ee960
[2] https://isc.sans.edu/diary/Malware+Analysis+with+elasticagent+and+Microsoft+Sandbox/27248
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Guy Bruneau IPSS Inc.
My Handler Page
Twitter: GuyBruneau
gbruneau at isc dot sans dot edu
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
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
8 months ago