Overview:
A brute force attack was detected in a customer’s network targeting an admin account. Using a SIEM tool, the security team identified multiple failed login attempts from a malicious IP address, eventually leading to a successful login after 100 attempts.
Incident:
The attacker repeatedly tried to gain access to the admin account by entering incorrect credentials. After 100 failed attempts, one password was successfully guessed. The SIEM tool flagged this unusual activity, alerting the security team.
Actions Taken:
- Blocked the Malicious IP: Immediate action was taken to block the malicious IP address from further attempts.
- Informed the Customer: The customer was notified of the incident and provided a detailed report.
- Password Change: The customer was advised to change the admin account password to a stronger one.
- Security Awareness: The team educated the customer about the importance of strong passwords and recommended enabling multi-factor authentication (MFA).
Outcome:
The immediate response limited any potential damage. The customer’s security was enhanced through password updates and awareness, and the incident served as a reminder of the importance of strong, unique passwords and proactive monitoring.
Key Takeaways:
- Timely detection and swift action are critical in preventing successful attacks.
- Strong passwords and MFA are essential defenses against brute force attacks.
