By Jose Nazario
Nutshell evaluate - this is often a good ebook on computer virus heritage, improvement, detection and security. if you'd like a e-book masking machine worms then this is often for you.
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Extra resources for Defense and Detection Strategies against Internet Worms
Sample text
2D 504: United States of America v. Robert Tappan Morris, 1991. txt. , “The Future of Internet Worms,” 2001 Blackhat Briefings, Las Vegas, NV, July 2001. pdf. [3] Max Vision, “Ramen Internet Worm Analysis,” 2001. html. [4] CERT Coordination Center, “Widespread Compromises via ‘Ramen’ Toolkit," CERT Incident Note IN-2001-01, 2001. htmls. 4 Conclusions References B ecause of its continual growth and typical repetitive nature, worm traffic can be readily characterized. Although it is relatively easy to build a signature for a detection engine, typically used on a network intrusion detection system (NIDS) and discussed in Chapter 11, a more flexible approach is to look at traffic characteristics and monitor their trends.
The rate and volume of mail delivery will choke out other, legitimate messages much as worm traffic will overtake a network on the Internet link. Furthermore, if the server performs scans of the messages as they pass through, this additional bottleneck can aggravate the stress on the mail server. Similarily, local Web servers can feel the brunt of a worm attack. When locally biased scans are used by worms, such as is found in Nimda and Code Red II, the local Web servers feel the burden quickly and can collapse under the load.
Since the attack is executed between two hosts and over the network, it is visible to monitoring systems. This provides the most accessible wide area monitoring of the network for the presence of an active worm. However, it requires a signature of the attack to trigger an alert. Furthermore, passive intrusion detection systems cannot stop the worm, and the administrator is alerted to the presence of the worm only as it gains another host. 5 Passing messages: communication Worms exist only on computer networks composed of individual hosts.