Another Maldoc? I'm Afraid So...

Published: 2015-05-15
Last Updated: 2015-05-15 09:35:25 UTC
by Didier Stevens (Version: 1)
3 comment(s)

Guess what? Yep, there's yet another type of malicious document going around. Like last time, it's a MIME file with an MSO file containing an OLE file.

The sample (schro_193B11.xls 7F8C5E8B7157B04FA8E9CEEF13C28AB9) is an Excel spreadsheet saved as a MIME file:

But this time, the compressed data is at another position inside the MSO file:

So I updated my oledump tool (V0.0.16) to search for compressed data inside MSO files (in stead of looking at a fixed position 50).

The string encoding used in the VBA code is interesting. It is reminiscent of RC4:

I also updated my plugin plugin_dridex with this encoding:

Didier Stevens
Microsoft MVP Consumer Security
blog.DidierStevens.com DidierStevensLabs.com

Keywords: Excel maldoc MIME MSO OLE
3 comment(s)
ISC StormCast for Friday, May 15th 2015 http://isc.sans.edu/podcastdetail.html?id=4485

Comments

cwqwqwq
eweew<a href="https://www.seocheckin.com/edu-sites-list/">mashood</a>
WQwqwqwq[url=https://www.seocheckin.com/edu-sites-list/]mashood[/url]
dwqqqwqwq mashood
[https://isc.sans.edu/diary.html](https://isc.sans.edu/diary.html)
[https://isc.sans.edu/diary.html | https://isc.sans.edu/diary.html]
What's this all about ..?
password reveal .
<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure:

<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
https://thehomestore.com.pk/

Diary Archives