Bootcamp | 6.1.17 |top|
In the context of Cisco CyberOps Associate curriculum (specifically the Cisco CyberOps Associate course, formerly associated with the SECFND/SECOPS exams), Bootcamp 6.1.17 typically refers to a specific lab or exercise regarding Host-Based Intrusion Detection System (HIDS) Log Analysis , often utilizing tools like OSSEC (or Wazuh) or analyzing standard Linux system logs ( /var/log/auth.log , /var/log/secure ). Here is a write-up for the concepts and solution typically associated with this specific module/exercise number.
Lab Write-up: Analyzing HIDS Alerts (Bootcamp 6.1.17) Lab Objective The objective of this exercise is to demonstrate the ability to interpret Host-Based Intrusion Detection System (HIDS) alerts. Students are tasked with analyzing log entries to identify the nature of the attack , the targeted vulnerability , and the outcome of the intrusion attempt. Scenario You are a Security Operations Center (SOC) Analyst. Your HIDS platform (commonly OSSEC in this curriculum) has generated an alert regarding suspicious activity on a monitored Linux host. You must review the alert/log output to determine if the activity is malicious or a false positive. Key Concepts
HIDS: Monitors individual hosts (file integrity, log analysis, rootkit detection). Log Analysis: The process of reviewing system logs to identify anomalies. Brute Force Attacks: A trial-and-error method used to obtain information such as a user password or personal identification number (PIN). SSH (Secure Shell): A common protocol targeted in these labs for remote login attempts.
Walkthrough & Solution Note: While specific log outputs vary slightly by version, the standard 6.1.17 scenario involves analyzing a Brute Force Login attempt. Step 1: Identifying the Source and Destination Review the log output provided in the HIDS alert. Look for source IP addresses and destination ports. bootcamp 6.1.17
Observation: You will typically see multiple rapid entries in a short timeframe. Key Fields:
src_ip : The attacker's IP address. dst_port : Usually 22 (SSH) for this specific lab.
Step 2: Analyzing the Attack Pattern Look for the repetitive nature of the traffic. In the context of Cisco CyberOps Associate curriculum
Log Evidence: You will likely see entries similar to Failed password for invalid user or Failed password for root . Frequency: The timestamp on these logs shows attempts happening within seconds of each other (e.g., 5-10 attempts per second). Analysis: This high frequency and the variation in usernames (or attempts on 'root') indicate a Brute Force Attack or Dictionary Attack . The attacker is using an automated tool (like Hydra or Medusa) to guess credentials.
Step 3: Determining the Outcome Check the final lines of the log or the "Status" field provided in the lab.
Scenario A (Failed Attempt): The logs end with "Connection closed" or "Failed password," and no subsequent "Accepted password" log appears. Students are tasked with analyzing log entries to
Conclusion: The attack was unsuccessful. The HIDS successfully detected the attempt.
Scenario B (Successful Compromise): After a series of failures, you see a log entry stating Accepted password for [user] from [IP] . This is followed by a session opening ( pam_unix(sshd:session): session opened ).
