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Forensic Project

In: Computers and Technology

Submitted By devack12
Words 1241
Pages 5
March 6, 2015
March 6, 2015

Final Project
Cybercrime Forensics
Final Project
Cybercrime Forensics

Part 1: Review Packet Capture For this investigation, we have decided to use NetWitness Investigator to examine the packets captured from the computers in question. NetWitness Investigator is a software used to examine packets and list login information, transferred data, and IP addresses used, among others. For the purpose of this investigation, we are primarily concerned with the FTP (File Transfer Protocol) sessions and the file names they contained. We can use this information to identify the persons responsible for the data leak at Corporation Tech’s network. First, we created a new collection in NetWitness. We titled the collection Final Project for the purposes of this investigation. We then imported packets from the captured packets file titled ftpcapture.pcap. Once NetWitness imported the files, we were able to view information such as the login information and files transferred. Below is the information we collected. Source IP | Destination IP | Protocol | Username | Password | Files | 172.16.177.132 | 172.16.177.157 | FTP (21) | badguy | you will never guess this !! | badnotes1.txt | 172.16.177.132 | 172.16.177.157 | FTP (21) | badguy | you will never guess this !! | badnotes2.txt |

These files were transmitted on July 31, 2010 at 1:08:58 AM and totaled to 5.71KB, which is shown below in the following screen captures.

After our investigation of the FTP files in question, we investigated the remaining packet capture but did not identify anything further that could be considered questionable. The primary communication was between the IP addresses 172.16.177.132 and 172.16.177.157. Another attempt to login was made from the same IP addresses at the same time as the file transfer was performed using the credentials of anonymous as the username and mozilla@example.com was the password.

Part 2: Examine Forensic Image
The Paraben P2 Commander tool is a digital investigation tool which can be used for computer examination and analysis. It also has advanced features like Data Triage analysis, Xbox analysis, and pornography detection, along with file sorting to also include reporting and a case audit trail that gives investigators everything they needs to present what they find in a trustworthy and reputable way.
An image of the workstation computer was used and data was analyzed on a workstation computer which shows some possible illegal activity. The image of the workstation was created and then loaded into the P2 commander tool. Once the files were sorted and indexed, a Skype chat log was found between two individuals discussing the transfer of money from one to the other using credit cards for shopping in Germany. While the information found in the logs does not necessarily prove any persons are guilty of anything, it is information that is still highly suspicious to be found on a workstation computer. The reason for this is highly suspicious is because it seems some sort of transaction took place between the two individuals messaging. The chat log mentions keywords and phrases such as “go back to Germany and have blast with your friends!!”; “no thank you for shopping!”; “ok, well. Nice doing business with”; “the blue, the red is just for credit”; “what account did you transfer, the blue or red account?” and “did you get the money transferred?”. These phrases and keywords are more than enough reason to investigate further. The log was stored in a SQLite format and although it is a little scrambled with random characters, it is still possible to see that some sort of financial transaction had taken place on a workstation computer during business hours. An outgoing email was also found saying the following: “Here is the conversation if had with the suspect. He has no idea I'm undercover.....I will forward you more information as I have it….. Here is more information.......He has connections that get him credit card numbers, I still don't know any names he's very careful not to mention names.....standby until further contact...../Ron..” It would seem some sort of undercover investigation was already taking place by an individual named Ron.

Part 3: Create a Report of Findings The workstation host media was forensically captured and the image used for all subsequent evaluations. We found the text files badnotes1.txt and badnotes2.txt, which were stored on the accused’s hard drive and sent to another person. We obtained these text files using NetWitness and Paraben’s P2 Commander. We can verify the files have not been altered in any way by comparing the MD5 hash. Below are the text files that were transferred between suspects. The Skype conversation is detailed above in section 2.
Badnotes1.txt:
MD5: 8FF69E959D96E0D9F7D09F9B7C2FD7E0
“Notes:
remember to gather up all the users you collected with their passwords, this will be useful when trying to make the money transfer.
They will not know what hit them, we are going to be rich!!!
Have fun transfering all the money!”
Badnotes2.txt:
MD5: 1EBD8F793366682E9BA65EB9B9D22075
“Notes:
Remember to deposit the money on our account, i need to buy my new car. I'm so exited to see how much you can collect from the stolen credit cards.
I was able to collect 200,000+ credit card numbers, i hope you can print some cards so we can go shopping.
Also remember to delete this file after you read it, i don't want the ftp administrator to see them. cya!!” To acquire this evidence, we made an image of the suspect’s hard drive. We then used Paraben P2 Commander to analyze the hard drive. This program allowed us to view the hard drive image in the original NTFS file tree. We were then able to sort the files and analyze them. We also used NetWitness to view captured FTP traffic which showed us files that were transferred between the two suspects. These files were then analyzed and allowed us to draw some conclusions at this point. The two suspects were stealing credit card information and transferring money. They were planning on printing the stolen card numbers and using them to purchase miscellaneous goods. The Skype conversation, however, allows us to draw different conclusions. A person by the name of “Ron” was messaging someone else about the fact that the person supplying the credit card numbers did not know that he was “undercover.” It would appear as though this “Ron” was gathering information against the other person, attempting to acquire more solid evidence against them and find their contact with the credit card numbers. The workstations in question have the IP addresses of 172.16.177.132 and 172.16.177.157. Since these IP addresses are in the same subnet, we can safely conclude that the persons in question both work for the company. The person who received the text files (172.16.177.157) could be working for the other company, NetTech24x7, however, the files and conversation do not indicate any company property being transferred or stolen. The credit card data is definitely cause for concern, however, it appears that the data is coming from an outside source through other means. I feel that an investigation should definitely be conducted and the persons found guilty be charged with credit card fraud and identity theft. The evidence found would be enough to convict them of these charges. I do not feel that any data is being leaked to NetTech24x7, based on the evidence found and detailed above.

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