Forensics: Recovery of Files Ep 1

Forensics: Recovery of Files Ep 1 - Recuva

The video below shows a demo of how to recover lost/deleted files using the tool commonly known as Recuva. In the video, we format the USB drive, add stuff to it, and then format it again in order to recover the deleted files.

A key point to note when it comes to dealing with FAT32 or NTFS systems is that if you write more content to the drive after formatting, in all likelihood it may end up overwriting the sections where the data to be recovered is. You see, when we do a quick format as shown in the video, we're not wiping the drive per se. We're just stating in the respective file tables that the areas/sectors of disk space that were previously occupied by the data we have deleted are now available for reuse. That's what makes it possible for us to recover deleted files.

You will also note that not only the files we lost upon formatting are the ones that are recovered, but this will also include the files from "formats past" as well.

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Password Cracking: RainbowCrack table generation, sorting and usage

I had to do this demo after one of my students asked for my assistance regarding how to use this tool. Usually, I just assign different tools to them individually depending on the aspect of penetration testing we are covering (session hijacking, vulnerability scanning, etc) and then tell them to submit a report and a video demo of how the tool is used. Anyway, after a brief one-to-one discussion I realized the student had actually done the research on how rainbow tables operate (above and beyond the material in the lecture slides) so I figured that if he was here asking for assistance, he genuinely needed it. The tool is available at the RainbowCrack site. A detailed description of this nifty tool can also be found here . So, firstly I had to generate the rainbow tables. The command line syntax is: rtgen hash_algorithm charset plaintext_len_min plaintext_len_max table_index chain_len chain_num part_index where: hash_algorithm Rainbow table is hash algorithm sp...

Part 4 - Static and Dynamic analysis of a Remote Access Trojan

Now we delve into the world of Malware analysis, This can be either Basic static, basic dynamic, advanced static or advanced dynamic malware analysis. By static we just mean we do not execute the malicious program but simply analyse it by looking at the headers, the linked libraries it calls, its resources, etc. When it is advanced, this would mean breaking it down and analysing it with tools such as IDA Pro. Dynamic means we run it in a safe environment and see what it does. Basic tools include Regshot which simply takes a snapshot of the registry before and after the malware was executed. It then returns only the changes made in between those two points in time. Advanced would involve the use of a sandbox that monitors all the calls the malware makes as well as the connection attempts it tries to make to outside terminals or C&C servers. The video below illustrates Basic Static and Dynamic malware analysis.

Forensics: Recovery of Files Ep 2 - Data Rescue PC3

This is the second episode in the Recovery of Files series. Episode 1 has a little more background on the whole aspect of file recovery. The video below shows a demo of how to recover lost/deleted files using the proprietary tool commonly known as Data Rescue PC3 . As in episode 1, in the video, we format the USB drive, add stuff to it, and then format it again in order to recover the deleted files. Again, just like in episode 1, you will also note that not only the files we lost upon formatting are the ones that are recovered, but this will also include the files from previous drive formats too.

Robsec

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