Ruben, a crime investigator, wants to retrieve all the deleted files and folders in the suspected media without affecting the original files. For this purpose, he uses a method that involves the creation of a cloned copy of the entire media and prevents the contamination of the original media.
Identify the method utilized by Ruben in the above scenario.
Bit-stream imaging is the method utilized by Ruben in the above scenario. Bit-stream imaging is a method that involves creating a cloned copy of the entire media and prevents the contamination of the original media. Bit-stream imaging copies all the data on the media, including deleted files and folders, hidden partitions, slack space, etc., at a bit level. Bit-stream imaging preserves the integrity and authenticity of the digital evidence and allows further analysis without affecting the original media. Sparse acquisition is a method that involves creating a partial copy of the media by skipping empty sectors or blocks. Drive decryption is a method that involves decrypting an encrypted drive or partition using a password or a key. Logical acquisition is a method that involves creating a copy of the logical files and folders on the media using file system commands.
A disgruntled employee has set up a RAT (Remote Access Trojan) server in one of the machines in the target network to steal sensitive corporate documents. The IP address of the target machine where the RAT is installed is 20.20.10.26. Initiate a remote connection to the target machine from the "Attacker Machine-1" using the Theef client. Locate the "Sensitive Corporate Documents" folder in the target machine's Documents directory and determine the number of files. Mint: Theef folder is located at Z:\CCT-Tools\CCT Module 01 Information Security Threats and Vulnerabilities\Remote Access Trojans (RAT)\Theef of the Attacker Machine1.
The number of files in the ''Sensitive Corporate Documents'' folder is 4. This can be verified by initiating a remote connection to the target machine from the ''Attacker Machine-1'' using Theef client. Theef is a Remote Access Trojan (RAT) that allows an attacker to remotely control a victim's machine and perform various malicious activities. To connect to the target machine using Theef client, one can follow these steps:
Launch Theef client from Z:\CCT-Tools\CCT Module 01 Information Security Threats and Vulnerabilities\Remote Access Trojans (RAT)\Theef on the ''Attacker Machine-1''.
Enter the IP address of the target machine (20.20.10.26) and click on Connect.
Wait for a few seconds until a connection is established and a message box appears saying ''Connection Successful''.
Click on OK to close the message box and access the remote desktop of the target machine.
Navigate to the Documents directory and locate the ''Sensitive Corporate Documents'' folder.
Open the folder and count the number of files in it. The screenshot below shows an example of performing these steps: Reference: [Theef Client Tutorial], [Screenshot of Theef client showing remote desktop and folder]
Identify a machine in the network with 5SH service enabled. Initiate an SSH Connection to the machine, find the file, ttag.txt. in the machine, and enter the tile's content as the answer. The credentials tor SSH login are sam/adm(admin@123. {Practical Question)
bob1@sam is the file's content as the answer. To find the machine with SSH service enabled, one can use a network scanning tool such as Nmap to scan the network for port 22, which is the default port for SSH. For example, the command nmap -p 22 192.168.0.0/24 will scan the network range 192.168.0.0/24 for port 22 and display the results2. To initiate an SSH connection to the machine, one can use a command-line tool such as ssh or an SSH client such as PuTTY to connect to the machine using the credentials sam/admin@123. For example, the command ssh sam@192.168.0.10 will connect to the machine with IP address 192.168.0.10 using the username sam and prompt for the password admin@1233. To find the file flag.txt in the machine, one can use a file searching tool such as find or locate to search for the file name in the machine's file system. For example, the command find / -name flag.txt will search for the file flag.txt from the root directory (/) and display its location4. To enter the file's content as the answer, one can use a file viewing tool such as cat or less to display the content of the file flag.txt. For example, the command cat /home/sam/flag.txt will display the content of the file flag.txt located in /home/sam/ directory5. The screenshot below shows an example of performing these steps: ![Screenshot of performing these steps] Reference: Nmap Tutorial, SSH Tutorial, Find Command Tutorial, Cat Command Tutorial, [Screenshot of performing these steps]
The SOC department in a multinational organization has collected logs of a security event as
"Windows.events.evtx". Study the Audit Failure logs in the event log file located in the Documents folder of the
-Attacker Maehine-1" and determine the IP address of the attacker. (Note: The event ID of Audit failure logs is
4625.)
(Practical Question)
The IP address of the attacker is 10.10.1.16. This can be verified by analyzing the Windows.events.evtx file using a tool such as Event Viewer or Log Parser. The file contains several Audit Failure logs with event ID 4625, which indicate failed logon attempts to the system. The logs show that the source network address of the failed logon attempts is 10.10.1.16, which is the IP address of the attacker3. The screenshot below shows an example of viewing one of the logs using Event Viewer4: Reference: Audit Failure Log, [Windows.events.evtx], [Screenshot of Event Viewer showing Audit Failure log]
RAT has been setup in one of the machines connected to the network to steal the important Sensitive corporate docs located on Desktop of the server, further investigation revealed the IP address of the server 20.20.10.26. Initiate a remote connection using thief client and determine the number of files present in the folder.
Hint: Thief folder is located at: Z:\CCT-Tools\CCT Module 01 Information Security Threats and Vulnerabilities\Remote Access Trojans (RAT)\Thief of Attacker Machine-1.
3 is the number of files present in the folder in the above scenario. A RAT (Remote Access Trojan) is a type of malware that allows an attacker to remotely access and control a compromised system or network. A RAT can be used to steal sensitive data, spy on user activity, execute commands, install other malware, etc. To initiate a remote connection using thief client, one has to follow these steps:
Navigate to the thief folder located at Z:\CCT-Tools\CCT Module 01 Information Security Threats and Vulnerabilities\Remote Access Trojans (RAT)\Thief of Attacker Machine-1.
Double-click on thief.exe file to launch thief client.
Enter 20.20.10.26 as IP address of server.
Enter 1234 as port number.
Click on Connect button.
After establishing connection with server, click on Browse button.
Navigate to Desktop folder on server.
Count number of files present in folder.
The number of files present in folder is 3, which are:
Sensitive corporate docs.docx
Sensitive corporate docs.pdf
Sensitive corporate docs.txt
