It seems that macro based document are, again, used to spread malware. Even the Malware Protection Centre from Microsoft mentioned it recently. Seems like an old trick, but apparently works like a charm. Most probably users trust too much Office documents as they keep exchanging them multiple time per day as part of their business/private activities. Most malicious Office documents have a macro that actually download a malicious file. Let’s see a quick way to have a better view on what exactly is happening.
There is many way to investigate malware and to “find evil” in an unknown executable. There will be situation where looking at a list of running processes won’t give you information to raise a red flag. You can always go deeper and perform more manual analysis. Even though this might be fun it might also be very time consuming…and we don’t always have the luxury of time neither the resources.
Analysis of mutexes (sometime called mutant) can be a pretty good way to continue your analysis and find more evidence of “evil”.
Microsoft has released an updated version of the sysinternals tools recently. This update include a tool named: sysmon. You can find all details from the TechNet website by following this link: http://technet.microsoft.com/en-us/sysinternals/dn798348.aspx
In short the tool will provides detailed information about process creations, network connections, and changes to file creation time. As you can guess this sounds like the perfect addition for your lab!
Obviously if you want to enjoy the challenge then don’t read this article, go on the challenge page, download what’s necessary and go have some fun first!