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Event: net_filecopy_tool_exec

Quick Explanation

The net_filecopy_tool_exec recipe identifies the execution of network file copy tools, which is crucial for detecting potential unauthorized data transfers and exfiltration attempts. This event has significant implications for the CI/CD pipeline, as it suggests that recent changes in a pull request might introduce or modify scripts using these tools, posing a risk of sensitive information leakage.

More Information

Information

  1. Description: Network file copy tool
  2. Category: Exfiltration
  3. Method: Exfiltration Over Other Network Medium
  4. Importance: Critical, High, Medium

Analysis of the Event

This detection event is triggered when a network file copy tool is executed within the monitored environment. The tools identified include popular utilities such as scp, rsync, sftp, and others used for transferring files over a network. The detection mechanism relies on monitoring file execution events, specifically targeting commands known for their capability to exfiltrate data across different network mediums.

According to the MITRE ATT&CK framework, this falls under the Exfiltration tactic, with the technique being Exfiltration Over Other Network Medium (T1048). This technique involves adversaries using non-standard protocols or tools to transfer data out of a compromised environment, bypassing traditional security controls that monitor standard data transfer methods.

The implications of such an event are significant, as it indicates potential unauthorized data transfers that could lead to sensitive information leakage. This detection helps identify attempts to move data out of the organization through less monitored paths, thereby providing an opportunity to mitigate potential data breaches.

Implications for the CI/CD Pipeline

The detected event suggests that recent changes in the pull request might have introduced or modified scripts or configurations that utilize network file copy tools. If these changes are merged and deployed into production without proper scrutiny, it could lead to unauthorized data exfiltration activities within both CI and production environments. This poses a risk of sensitive information being transferred outside the organization without detection by conventional monitoring systems.

  1. Review Code Changes: Thoroughly examine the code changes introduced by the pull request for any scripts or configurations that involve network file copy tools.
  2. Audit Dependencies: Check if any new dependencies or updates have been added that might include or leverage these tools.
  3. Implement Monitoring: Ensure robust monitoring and alerting mechanisms are in place for detecting the usage of network file copy utilities.
  4. Access Control: Restrict access to these tools and ensure they are only available to authorized personnel.
  5. Security Policies: Update security policies to include guidelines on the acceptable use of network file transfer utilities.
  6. Code Scanning: Use static code analysis tools to scan for potential misuse of file transfer commands in scripts and applications.

By following these steps, you can mitigate risks associated with unauthorized data exfiltration and ensure that your CI/CD pipeline remains secure against such threats.