An update on attempted man-in-the-middle attacks
August 29, 2011
The latest news and insights from Google on security and safety on the Internet
Four Years of Web Malware
August 17, 2011
Drive-by Download Exploit Trends
Far more common than social engineering, malicious pages install malware after exploiting a vulnerability in the browser or a plugin. This type of infection is often called a drive-by download. Our analysis of which vulnerabilities are actively being exploited over time shows that adversaries quickly switch to new and more reliable exploits to help avoid detection. The graph below shows the ratio of exploits targeting a vulnerability in one CVE to all exploits over time. Most vulnerabilities are exploited only for a short period of time until new vulnerabilities become available. A prominent exception is the MDAC vulnerability which is present in most exploit kits.
Prevalence of exploits targeting specific CVEs over time
Increase in IP Cloaking
Malware distributors are increasingly relying upon ‘cloaking’ as a technique to evade detection. The concept behind cloaking is simple: serve benign content to detection systems, but serve malicious content to normal web page visitors. Over the years, we have seen more malicious sites engaging in IP cloaking. To bypass the cloaking defense, we run our scanners in different ways to mimic regular user traffic.
New Detection Capabilities
Our report analyzed four years of data to uncover trends in malware distribution on the web, and it demonstrates the ongoing tension between malware distributors and malware detectors. To help protect Internet users, even those who don’t use Google, we have updated the Safe Browsing infrastructure over the years to incorporate many state-of-the-art malware detection technologies. We hope the findings outlined in this report will help other researchers in this area and raise awareness of some of the current challenges.
Malware distributors are increasingly relying upon ‘cloaking’ as a technique to evade detection. The concept behind cloaking is simple: serve benign content to detection systems, but serve malicious content to normal web page visitors. Over the years, we have seen more malicious sites engaging in IP cloaking. To bypass the cloaking defense, we run our scanners in different ways to mimic regular user traffic.
Number of sites practicing IP Cloaking over time
New Detection Capabilities
Our report analyzed four years of data to uncover trends in malware distribution on the web, and it demonstrates the ongoing tension between malware distributors and malware detectors. To help protect Internet users, even those who don’t use Google, we have updated the Safe Browsing infrastructure over the years to incorporate many state-of-the-art malware detection technologies. We hope the findings outlined in this report will help other researchers in this area and raise awareness of some of the current challenges.
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