San Francisco, Oct. 2, 2007 – Taking aim at the bot and zombie malware that turns unsuspecting users’ computers into dangerous spam and identity theft networks, MAAWG has issued the first best practices developed cooperatively by major Internet and email service providers for managing infected subscribers. The “MAAWG Best Practices for the Use of a Walled Garden” provides recommendations for directing customers to a safe online environment where downloadable self-remediation tools can help users remove the malicious code installed on their computers.
“The industry needs to define best practices to address this problem just as a public health department would define quarantine procedures for a biological infection that is affecting its citizens. These best practices are the first effort at unifying and educating ISPs and service providers on how to effectively confront this rapidly spreading malware,” said Scott Chasin, editor of the MAAWG walled garden recommendations and MX Logic, Inc. chief technology officer.
Wall gardens are closed online environments created by service providers where subscribers can safely disinfect their systems. When subscribers with infected computers try to access the Web, their browsers are automatically redirected to a protected environment provided by the ISP where the malicious code can be securely purged. The MAAWG best practices recommend these walled garden sites include downloadable tools that allow users to remove the malware themselves and that once the malicious code has been deleted subscribers’ Web access be easily restored. According to the best practices, end-user education should be a priority.
“Infected subscribers are facing a real menace but have no idea they have been compromised unless they notice their computers are running a little slow or the malware shows up in an anti-virus scan,” said Chasin.
Addresses Significant Source of Spam and Fraud
Currently, a large percentage of spam is sent through these ill-gotten networks. According to Richard Cox, the Chief Information Officer at the Spamhaus Project, a nonprofit that tracks malicious online activity and whose representative serves as a MAAWG senior advisor, “Every day — day in, day out — we see between 750,000 and 1.2 million new IP addresses, proxies and botnet zombies attempting to send spam. This does not mean they are all new infections, as infected PCs tend to move around the Internet IP address space of the users’ ISP.”
In a botnet, malware from various sources, such as a contaminated email or malicious code downloaded from a malignant Web site, is unknowingly installed on users’ computers. Once deployed, the “bot” or “zombie” machine is controlled by commands from a “bot master,” a person who uses the infected network to send spam or carry out fraudulent activities. The malicious code is often designed to run in background mode, so subscribers with polluted machines are usually unaware their systems are sending large quantities of spam.
The surreptitious networks can range from a thousand infected computers to hundreds of thousands and also can be used to launch Distributed Denial of Service (DDoS) attacks that prevent legitimate users from accessing a targeted Web site. Among other threats, the malware might also include a “key logger” to record users’ keystrokes and capture passwords or sensitive financial information that is forwarded to identity thieves.
Chasin said, “This is the first step and we’ll continue to drive peer-to-peer discussions on this issue. Service providers are becoming more sophisticated in their approach to botnets, and they realize the benefit to both themselves and the broader online community as they educate subscribers.”
The “MAAWG Best Practices for the Use of a Walled Garden” outlines criteria for entering and exiting closed safe environments, recommendations for convenient end-user self-remediation, and practices to make end-user education a primary focus. The document is available on the MAAWG Web site at www.MAAWG.org.