Rating:

The given file was foren2.E01.tar.gz and the problem was the following:


We need to few answers from you do you know them?
1. Recently accessced docs folder
2. Last keyword searched
Flag Format: darkCON{recently accessced docs folder_last keyword searched_last link entered}


The first thing to is to decompress with tar -xzf foren2.E01.tar.gz for example. After that we can use sleuthkit to examine the file. Now we could find the files we are interested in with fls and extract the files with icat but for me it was easier to extract all the files and look through the folders with tools like ls or find. We can extract all the files with the command tsk_recover foren2.E01 out, which puts all the files into the folder called out.

On Windows, the things we are looking for are stored in a registry hive called NTUSER.DAT, which is in the user folder. In our case, the only user is John Wick and the path to the hive we are looking for is out/Users/John Wick/NTUSER.DAT. The hive can be opened and examined with tools like regripper and Registry Explorer.

The path to the key containing values about recently accessed folders is NTUSER.DAT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\RecentDocs\Folder. The value named MRUListEx contains sequential 4 bite hexadecimal numbers, which refer to the names of other values under the key. The first number is the name of the value, containing data about the last accessed resource, which is in our case the last accessed folder. The data of that value contains the name of the resource and in our case it is **secluded**. Some tools like Registry Explorer automatically parse the data and the sequence into a more human readable format.

The path to the key about last keyword searched is NTUSER.DAT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\WordWheelQuery. There you can find data in the same format as the last key and our answer is **Anachronistic**.

The last link entered is a bit different. In our case, the browser used is Internet Explorer and the urls are also in the hive. Other browsers usually keep their data in other locations on the drive. The path to the key is NTUSER.DAT\SOFTWARE\Microsoft\Internet Explorer\TypedURLs and the value we are looking for is the first value named url1. The answer is **https://www.youtube.com/watch?v=Z1xs1BRBO7Q**.

All the information found must be combined and the final flag is **darkCON{secluded_Anachronistic_https://www.youtube.com/watch?v=Z1xs1BRBO7Q}**. The dark**CON** part is very important or you might possibly lose your mind for half an hour about what is wrong before noticing, that you wrote darkCTF.

Original writeup (https://github.com/keyboard-monkeys/ctf-writeups/blob/main/2021-darkctf/forensics_do_you_know_them%253F.md).