My enterprise recently suffered a server breach and we're now trying to clean up. I've noticed more traffic than...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
usual coming from the server and have heard about hackers leaving behind tools called "booter shells" after attacks to be used for future DDoS attacks. How can I tell if booter shells are infecting this server? How can I clean them off if they're on the server?
Ask the expert
Have questions about enterprise information security threats for expert Nick Lewis? Send them via email today! (All questions are anonymous.)
Depending on the details of a breach, the risk involved with trying to clean-up a compromised server is very high as remnants from the breach can still remain, including the aforementioned booter shells, rootkits, malicious cron jobs, start-up scripts, compromised files, etc. Often, desktop systems are cleaned rather than rebuilt due to a fear of overwhelming desktop support with the task of rebuilding workstations. Server administrators share the same concerns. They might try to clean all traces of an attack from a server, but the consequences of not cleaning a server fully might be more significant than not cleaning a desktop.
If a file integrity monitor like Tripwire or OSSEC was being used prior to an incident, a system admin can discern which files were modified during the incident. This could allow the admin to be able to effectively clean a server using the data from the file integrity monitor. Booter shells can also be detected by monitoring network traffic for a high volume of traffic to a specific site. If booter shells and other remnants of an attack aren't fully cleaned from a server, it could still be used to attack other systems on the local network or Internet. Fully cleaning and securing a compromised server is vital to an organization's future security.
Dig Deeper on Denial of Service (DoS) Attack Prevention-Detection and Analysis
Related Q&A from Nick Lewis
Locky ransomware has, again, changed tactics by moving to using LNK files for distribution. Expert Nick Lewis explains how enterprises can adjust ...continue reading
Hajime malware was discovered to have links to the Mirai botnet that launched powerful DDoS attacks last year. Expert Nick Lewis explains how Hajime ...continue reading
Drammer, or a deterministic Rowhammer attack, was found to be more effective on ARM-based mobile devices. Expert Nick Lewis explains the issue with ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.