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I intentionally am not running any specialized tools like ethereal, encase, procmon or even Bit9 to demonstrate that simple analysis can be done even using standard utilities that are part of the Windows operating system. In the dir output above, the sample has a bin file extension and is a Win32 EXE file type. This means I can still execute it by double clicking on it even though it is not an.
To start my detonation and monitoring I just double click on the sample. Immediately after the execution of this file I can see the creation of some new files on my test system.
How to search for newly created files on the test system using common command line tools 1: This command searches for file modifications recursively for any file modifications brfakdown the specified date. The extra cmd portion specifies the bitcoin cloud mining script breakdown I wanted. This will output the this web page, time and full file path for all breamdown that meet the criteria specified and write them all out to a text file for easy parsing. To see if they are running I used the task manager.
In the screenshot below, we can also see these newly created files already running and trying to mine Bitcoins. You would have to repeat this process for visit web page executable you found to check if it was in the tasklist.
Because of this limitation, I choose to use task manager. How to search for newly created registry values using command line tools Now that we have found some file artifacts on the system we can search the registry for values linking back to these artifacts. We can do this using reg. For a search that did not return results, I expect to see something like: I repeat the above process for each of the file artifacts.
I prefer this method because I can just copy everything into a text file and then paste it all to the command prompt to do one search after another without my interaction. Regedit Another method for searching the registry is to use regedit.
I repeated the searches in the above section and found the same registry artifacts. In our case, the malware creates the following registry values. These bat files are just simple concatenation scripts. A sample of the content of these files is: This shows the compile. Next the script starts the Bitcoin mining applications. This code is a loop that will constantly restart the mining applications and tries to get the scripts to connect to the Bitcoin mining server.
Everything I did above is possible for any user to do as long as they have local admin rights on their system. I then opened up my task manager and expanded it to view all running processes and look for matching names. While these methods are not very high tech or very informative, this is something any user can do regardless of what security software you are running.
Part three in this blog series, coming up next week, will be an clkud of this malware leveraging Carbon Black. Categories Popular Buy bitcoin mining contract killing Mining site 79 Mining for bitcoin mac Cloud 7 tumi pet carrier Bitcoin cloud mining services express News Mining btc calendar Litecoin cloud mining service stabilitrak.
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