Detecting Botnets

A simple solution combining Darknet and IDS.
Not All Traffic Is Malicious

Although you decided to block IRC access from inside the network, it might not be that clear for other employees in your company. If Mary from another department tries to connect to her favorite IRC channel at lunchtime, you'll probably catch it, but that doesn't mean there is a malware on Mary's workstation trying to contact the control center. However, a number of the same type of connections from one or multiple computers often is a good indication that something is going wrong.

In my work every day, I see some strange behavior. People always are trying to install illegitimate software, sometimes without even knowing it. Sometimes an employee's children try continuously installing Limewire on a company laptop given to them for playing a game or browsing the Internet.

With a little bit of information, you should be able to gather some statistics and distinguish real threats from normal misuse or other isolated incidents.

Securing information systems is a very hard task. Today we are in ongoing war against attackers—fighting the battles of time and money. Time is crucial in securing all environments when there is a threat in the wild, but first you need to know about it. If you know your enemies, their intentions and weapons, it is much easier to react and mitigate attacks. That's what Darknet and honeypots are all about.

Grzegorz Landecki, CCNP, CISSP, is a security technologist at Cyber Security Team in Dublin, Ireland, responsible for protecting a major US company's 85K+, globally located computers.


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