Forensic: msfconsole use auxiliary/scanner/smb/smb enumshares attack (en)
This command is one of the modules in the Metasploit Framework used for enumeration or reconnaissance of the Server Message Block (SMB) service on a system. SMB is a network protocol commonly used for sharing files and printers in Windows networks. By using this module, an attacker can identify:
- Available Shares: This module will display a list of shares published by the target, such as shares for folders, printers, etc.
- Access Rights: Sometimes, this module can also provide information about access rights (read, write, execute) for those shares.
This information is very valuable for attackers as it can serve as a starting point for further attacks, such as:
- Finding Sensitive Files: If there are shares containing important files, the attacker may try to access them.
- Finding Vulnerabilities: Information about shares and access rights can be used to look for vulnerabilities that can be exploited.
Example Attack
Objective: Identify shares on an Ubuntu 24.04 server running the SMB service.
Steps:
1. Open Metasploit:
msfconsole
2. Select the module:
use auxiliary/scanner/smb/smb_enumshares
3. Set the target:
set RHOSTS <target_IP_address>
Replace `<target_IP_address>` with the target server's IP address.
4. Run the scan:
run
Results: If successful, Metasploit will display a list of found shares along with additional information such as share name, type, and comments.
Attack Forensics
Objective: Find evidence of an attack using the `smb_enumshares` module.
Steps:
1. Log Analysis:
- Metasploit Logs: Check the Metasploit logs for suspicious activity, such as the use of the `smb_enumshares` module and the targeted hosts.
- Target System Logs: Look for log entries related to the SMB service, such as unauthorized access to specific shares.
2. Network Traffic Analysis:
- Capture Network Traffic: Use tools like Wireshark to capture network traffic occurring during the attack.
- Filter Traffic: Filter the traffic based on the SMB protocol and the ports used (139 and 445).
- Search for SMB Packets: Look for SMB packets containing requests for share enumeration.
3. File Analysis:
- Look for Log Files: Search for log files related to the SMB service to identify suspicious activity.
- System File Analysis: Check system files to see if there are any files or directories accessed without authorization.
Evidence that can be found:
- Metasploit Logs: Records of the use of the `smb_enumshares` module.
- System Logs: Records of unauthorized access to SMB shares.
- Network Capture: SMB packets containing requests for share enumeration.
- Log Files: Records of suspicious activity in the SMB service.
Prevention
- Update the System: Ensure the system is always updated with the latest security patches.
- Limit Access: Restrict access to the SMB service only to authorized users.
- Use a Firewall: Configure the firewall to block unauthorized access to SMB ports.
- Monitor Logs: Regularly monitor system logs and application logs for suspicious activity.
- Implement IDS/IPS: Use an Intrusion Detection System (IDS) or Intrusion Prevention System (IPS) to detect and prevent attacks.
Important to Remember:
- Legality: The use of tools like Metasploit should be done with appropriate permissions and only for educational or security testing purposes.
- Ethics: Do not conduct attacks on systems for which you do not have permission.
By understanding how these attacks work and the forensic steps that can be taken, you can better protect your systems from similar threats.