NDLI: Topic modeling of SSH logs using latent dirichlet allocation for the application in cyber security

Content Provider	IEEE Xplore Digital Library
Author	Aswani, K. Cronin, A. Xirui Liu Heyuan Zhao
Copyright Year	2015
Description	Author affiliation: Univ. of Virginia, Charlottesville, VA, USA (Aswani, K.; Cronin, A.; Xirui Liu; Heyuan Zhao)
Abstract	Cyber intrusions are one of the main causes of fear across the internet and now, due to the substantial increase in network traffic, detection of each unauthorized access has become extremely difficult. Brute-force attacks are the most common form of malicious traffic. To prevent such attacks and detect them in real time many new techniques have been developed. The majority of these techniques monitor the sequential transfers between users/IPs and the network. However, though many networks are now monitoring their logs and can identify when brute-force attacks occur, they cannot provide more detailed information about the attack (such as where and how) without some form of direct visual inspection of the logs. In this paper, we explore a Latent Dirichlet Allocation as a form of topic modeling of IP addresses through SSH authentication logs with the final goal of automating classifications of users. Using textual topics or the “top words” associated with logs, we differentiate legitimate users and brute-attackers users according to their IP addresses and discuss the potential of topic modelling for identifying and further classification of cyber threats.
Starting Page	75
Ending Page	79
File Size	756071
Page Count	5
File Format	PDF
e-ISBN	9781479918324
DOI	10.1109/SIEDS.2015.7117015
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-04-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	IP networks Hidden Markov models Data models Resource management Servers Force Feature extraction LDA Topic model SSH logs Brute-force attacks
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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