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Comp 4027 Forensic and Analytical Computing Honeypot Research Hung Nguyen Brendan Roberts Overview • Scope • What is Needed – How will Honeypot Software help? – What will the intended result be? • Risks and Mitigation Strategies • Pros/Cons of Honeypot Software • Recommendations Scope • Supervisor has assigned us the task of gathering evidence of illicit activity on a host machine. • Supervisor expresses concerns that a particular server has been infiltrated in the past. And So... – We need to be able to detect any intrusions – We need to be able to gather enough information about the intrusion so as to prosecute the perpetrators(s). What is needed? • Deployment of Honeypot Software suggested… – Need to maintain the integrity of the system – Need to be able to detect that an intrusion has occurred – Need to be able to log illicit activity that occurs. How Will Honeypot Software Help? • Allows us to set up a decoy system – A system that is designed to be attacked – Imitates the original server, without exposing the server to further illicit activity when intrusion occurs – Gives us the tools to monitor this activity to be used as evidence. Intended Results… • Work out if intrusions are occurring – Workout how these intrusions are occurring and what the target of the intrusion is – Preventing intrusions in this way in the future, if possible • Catching the perpetrator – Having enough evidence that they are doing something wrong by accessing the network – Prosecution Risks and Mitigation Strategies • Allowing the Network to be further exposed by the Decoy system (preventing jump-off attacks) – Need to consider where in the system architecture the decoy system is placed • We are assuming that intruders are ‘hacking in’, rather than the perpetrator being inside the organisation. • Can Either place the Honeypot external to the network, or if a Demilitarised Zone exists, place it there. Risks and Mitigation Strategies • Honeypot Discovery – If the Honeypot is discovered, the intruder may be deterred from doing something wrong. • Can by mitigated by making sure the victim/decoy system is as clean as possible of any evidence of anything about Honeypots or Intrusion Detection Systems. Risks and Mitigation Strategies • Honeypot is too enticing, inviting and entrapping perpetrators • Don’t Advertise/invite the perpetrators in • Keep everything on the decoy system as it was on the real system, rather than being more enticing. Risks and Mitigation Strategies • Sensitivity of content on the real system – If the content on the real system is • Sensitive • Imperative to the smooth running of workflow in the institution • Private or Confidential – .. Is it possible to make false data to go on to the decoy system so as to avoid exposing the real data Pros/Cons • Pros: – Allows detection and dealing with intrusions without compromising the original system, by setting up a decoy / victim system. • Cons: – If the Honeypot system is broken out of, then what? Is the system compromised again? – Incorrect server architecture may not correctly identify the intruder (for example if an insider can intrude from inside the network, then having a Honeypot on the external or DMZ won’t matter much) Recommendations • Implement a Honeypot – Interest has been sparked over HoneyD Software • Open Source software developed by Niels Provos • Offers tools for detection of intrusion, as well as the ability to set up virtual (Decoy) hosts on a system as various services, such as ftp or mail servers etc. • Allows the virtual host to take up some or all of the unused IP addresses on the network to detect other malicious potential issues, such as worms and IP sniffing. • Has the ability to assign multiple IP Addresses to the one virtual host. References • http://www.honeyd.org/general.php HoneyD.org • http://www.securityfocus.com/infocus/1659 Spitzner, L, 2003 http://www.philippinehoneynet.org/index2.php?option=com_docman&task=doc_view&gid=4&Itemid =29 http://www.certconf.org/presentations/2002/Tracks2002Expert_files/HE-1&2.pdf http://www.honeypots.net • http://en.wikipedia.org/wiki/Honeypot_(computing)
