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Intrusion Signatures and Analysis, by Matt Fearnow, Stephen Northcutt, Karen Frederick, Mark Cooper
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Intrusion Signatures and Analysis opens with an introduction into the format of some of the more common sensors and then begins a tutorial into the unique format of the signatures and analyses used in the book. After a challenging four-chapter review, the reader finds page after page of signatures, in order by categories. Then the content digs right into reaction and responses covering how sometimes what you see isn¿t always what is happening. The book also covers how analysts can spend time chasing after false positives. Also included is a section on how attacks have shut down the networks and web sites of Yahoo, and E-bay and what those attacks looked like. Readers will also find review questions with answers throughout the book, to be sure they comprehend the traces and material that has been covered.
- Sales Rank: #914470 in Books
- Color: White
- Brand: Brand: Sams Publishing
- Published on: 2001-01-29
- Original language: English
- Number of items: 1
- Dimensions: 8.90" h x 1.00" w x 7.00" l, 1.51 pounds
- Binding: Paperback
- 448 pages
Features
- Used Book in Good Condition
Amazon.com Review
Stephen Northcutt and his coauthors note in the superb Intrusion Signatures and Analysis that there's really no such thing as an attack that's never been seen before. The book documents scores of attacks on systems of all kinds, showing exactly what security administrators should look for in their logs and commenting on attackers' every significant command. This is largely a taxonomy of hacker strategies and the tools used to implement them. As such, it's an essential tool for people who want to take a scientific, targeted approach to defending information systems. It's also a great resource for security experts who want to earn their Certified Intrusion Analyst ratings from the Global Incident Analysis Center (GIAC)--it's organized, in part, around that objective.
The book typically introduces an attack strategy with a real-life trace--usually attributed to a real administrator--from TCPdump, Snort, or some sort of firewall (the trace's source is always indicated). The trace indicates what is happening (i.e., what weakness the attacker is trying to exploit) and the severity of the attack (using a standard metric that takes into account the value of the target, the attack's potential to do damage, and the defenses arrayed against the attack). The attack documentation concludes with recommendations on how defenses could have been made stronger. These pages are great opportunities to learn how to read traces and take steps to strengthen your systems' defenses.
The book admirably argues that security administrators should take some responsibility for the greater good of the Internet by, for example, using egress filtering to prevent people inside their networks from spoofing their source address (thus defending other networks from their own users' malice). The authors (and the community of white-hat security specialists that they represent) have done and continue to do a valuable service to all Internet users. Supplement this book with Northcutt's excellent Network Intrusion Detection, which takes a more general approach to log analysis and is less focused on specific attack signatures. --David Wall
Topics covered:
- External attacks on networks and hosts, as they appear to administrators and detection systems monitoring log files
- How to read log files generally
- How to report attacks and interact with the global community of good-guy security specialists
- The most commonplace critical security weaknesses
- Traces that document reconnaissance probes
- Denial-of-service attacks
- Trojans
- Overflow attacks
- Other black-hat strategies
From the Back Cover
Intrusion Signatures and Analysis opens with an introduction into the format of some of the more common sensors and then begins a tutorial into the unique format of the signatures and analyses used in the book. After a challenging four-chapter review, the reader finds page after page of signatures, in order by categories. Then the content digs right into reaction and responses covering how sometimes what you see isn?t always what is happening. The book also covers how analysts can spend time chasing after false positives. Also included is a section on how attacks have shut down the networks and web sites of Yahoo, and E-bay and what those attacks looked like. Readers will also find review questions with answers throughout the book, to be sure they comprehend the traces and material that has been covered.
About the Author
Stephen Northcutt is the author of several books including: Incident Handling Step-by-Step, Intrusion Detection: Shadow Style (both by the SANS Institute) and Network Intrusion Detection: An Analyst's Handbook (New Riders) as well as a contributing editor for Securing NT Step-by-Step (The SANS Institute.) He was the original developer of the Shadow intrusion detection system and served as the leader of the Department of Defenses Shadow Intrusion Detection Team for two years. Mr. Northcutt was the Chief for Information Warfare at the Ballistic Missile Defense Organization and currently serves as the Director for GIAC Training and Certification for the SANS Institute. Mark Cooper graduated from UMIST in 1991 with a BS in Microelectronic Systems Engineering. Currently working as a security consultant, he reached his current position after spending many years as a software engineer and then as a UNIX Systems Administrator. He is now a SANS GIAC Certified Intrusion Analyst. Matt Fearnow is a Network/ Security Administrator for Macmillan USA. Before working at Macmillan, he served in the US Navy as a Sonar Technician aboard submarines. In his current duties he constantly utilizes his SANS GIAC certification and is a frequent contributor to the SANS GIAC website. Matt was the first to establish categories for the traces from completed GIAC practicals. Karen Frederick is an Infosec Engineer for Sun Tzu Security in Milwaukee, Wisconsin. She earned her bachelor's degree in computer science from the University of Wisconsin-Parkside, and she is currently completing her master's degree thesis in intrusion detection from the University of Idaho's Engineering Outreach program. Karen holds several certifications, including Microsoft Certified Systems Engineer + Internet, Check Point Certified Security Administrator and GIAC Certified Intrusion Analyst.
Most helpful customer reviews
21 of 23 people found the following review helpful.
When a good book is worth a thousand experiences!
By Marco De Vivo
This is the best book about Intrusion Signatures published yet.
I teach computer security at a local university, and with the only help of this book, I could take care of all the practical aspects of my last course. If you have already a good background on this field, and read and understand thoroughly the book, then you can afford any related security certification test.
Chapters 3 through 17, present several well documented cases, which, in turn, are discussed following the same standard:
- Presentation
- Source of Trace
- Detect Generated by
- Probability the Source Address Was spoofed
- Attack Description
- Attack Mechanism
- Correlations
- Evidence of Active Targeting
- Severity
- Defense Recommendations
- Questions
Chapter 1 introduces the reader to Analysis of Logs (including Snort, Tcpdump, and Syslog), IDS, and Firewalls. Even being a quick review, it is quite useful, though.
Chapter 2 explains the way the cases are studied.
The covered vulnerabilities and attacks include:
- Internet Security Threats
- Routers and Firewalls Attacks
- IP Spoofing
- Networks Mapping and Scanning
- Denial of Service
- Trojans
- Assorted Exploits
- Buffer Overflows
- IP Fragmentation
- False Positives
- Crafted Packets
At the bottom line, this is one of the 5 best computer security books I ever read. Even for non experts, the book can be a valuable tool to improve the understanding on this field.
Try it.
0 of 0 people found the following review helpful.
Three Stars
By Kunapureddy Pratyush
needs to be revised from the Author as times have changed.
48 of 48 people found the following review helpful.
A good start, but proceed with caution: uncertain analysis
By Richard Bejtlich
Disclaimer: I withdrew a chapter from this book, and my words appear on p. 25. "Intrusion Signatures" tries to share the collective wisdom of SANS GIAC certification candidates, tempered by more experienced SANS editors. I applaud their intentions, but the uneven analysis and commentary warrants faint praise. New analysts flying solo should not read this book. Analysts with a guru to consult should get his or her input before trusting the book's interpretations.
Examples: (1) Eric Hacker expertly discusses a Windows password problem on pp. 77-85, but a significant trace is missing on p. 81. This causes the following dozen traces to not match their respective explanations. Would a new analyst notice? (2) Several times (p. 87, etc.) the authors fail to realize "public" is a common default SNMP "read" community string, while "private" is the "read/write" counterpart. This mistake is crucial elsewhere in the book. (3) The editors call a clear example of round-trip-time determination a "half-open DNS scan." It's ok for certification students to make judgement errors, but SANS editors should explain why that view isn't correct. (4) A very questionable "SYN flood" trace in ch. 10 doesn't match the "reproduction" of the same trace in the question-and-answer appendix -- that one's missing a crucial packet! (5) A "spoofed FTP request" in ch.11 looks like an active FTP data attempt to me. That concept is explained on p. 329, but the authors don't apply the same reasoning to ch.11's example. Why?
On the positive side, I was impressed by Mark Cooper's work on buffer overflows and ICMP redirects. Some of the student work is also first-rate, but it may be tough for new readers to make the necessary distinctions.
The authors owe it to the target audience (new analysts) to deliver accurate explanations. Different interpretations are expected, but errors like those listed require scrutiny. The work is sincere -- I just can't recommend this book to inexperienced intrusion detectors.
See all 12 customer reviews...
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