Title
Detecting Malicious Activities With User-Agent-Based Profiles
Abstract
Hypertext transfer protocol (HTTP) has become the main protocol to carry out malicious activities. Attackers typically use HTTP for communication with command-and-control servers, click fraud, phishing and other malicious activities, as they can easily hide among the large amount of benign HTTP traffic. The user-agent (UA) field in the HTTP header carries information on the application, operating system (OS), device, and so on, and adversaries fake UA strings as a way to evade detection. Motivated by this, we propose a novel grammar-guided UA string classification method in HTTP flows. We leverage the fact that a number of standard' applications, such as web browsers and iOS mobile apps, have well-defined syntaxes that can be specified using context-free grammars, and we extract OS, device and other relevant information from them. We develop association heuristics to classify UA strings that are generated by non-standard' applications that do not contain OS or device information. We provide a proof-of-concept system that demonstrates how our approach can be used to identify malicious applications that generate fake UA strings to engage in fraudulent activities. Copyright (c) 2015 John Wiley & Sons, Ltd.
Year
DOI
Venue
2015
10.1002/nem.1900
INTERNATIONAL JOURNAL OF NETWORK MANAGEMENT
Field
DocType
Volume
Phishing,Computer security,Computer science,Server,Computer network,Heuristics,Click fraud,Header,Malware,Hypertext Transfer Protocol,User agent
Journal
25
Issue
ISSN
Citations 
5
1055-7148
2
PageRank 
References 
Authors
0.41
5
7
Name
Order
Citations
PageRank
Yang Zhang1345.55
Hesham Mekky2305.07
Zhi Li Zhang3875.86
Ruben Torres4363.07
Sung-Ju Lee53511278.11
Alok Tongaonkar624114.88
Marco Mellia72748204.65