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INSA. Information Networking Security and Assurance Lab National Chung Cheng University. http://www.nessus.org. Nessus. A Vulnerability Assessment tool A Security Scanner. INSA. Information Networking Security and Assurance Lab National Chung Cheng University. Outline.
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INSA Information Networking Security and Assurance Lab National Chung Cheng University http://www.nessus.org Nessus A Vulnerability Assessment tool A Security Scanner
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
INSA Information Networking Security and Assurance Lab National Chung Cheng University Description • The “Nessus” security scanner is a software which will audit remotely a given network and determine whether someone (or something - like a worm) may break into it, or misuse it in some way
INSA Information Networking Security and Assurance Lab National Chung Cheng University Feature • Free • Powerful • Fast • Modular architecture • Reliable • Up-to-date (#nessus-update-plugins)
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
INSA Information Networking Security and Assurance Lab National Chung Cheng University The Client-Server Architecture Nessus Client WWW FTP Mail Nessus Server-nessusd Proxy
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
INSA Information Networking Security and Assurance Lab National Chung Cheng University Environment • Version • 2.2.0 • Platform • Intel X86 • OS • Debian GNU/Linux • Compiler • gcc-2.95
INSA Information Networking Security and Assurance Lab National Chung Cheng University Three Choices!! The easy and dangerous way!! The easy and less dangerous way!! The Debian fast way!!
INSA Information Networking Security and Assurance Lab National Chung Cheng University Start
Add User The command User name The way of auth Type the password The rule set for the user
INSA Information Networking Security and Assurance Lab National Chung Cheng University Start nessusd Run the nessusd as daemon!! Loading the plugins
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
linux.ee.isu Environment The router of EE The router of ISU Internet WJL.ee.ccu The router of CCU
INSA Information Networking Security and Assurance Lab National Chung Cheng University Start the scan
INSA Information Networking Security and Assurance Lab National Chung Cheng University Report
INSA Information Networking Security and Assurance Lab National Chung Cheng University Report with HTML Format
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
linux.ee.isu Environment NessusWX The router of EE The router of ISU Internet WJL.ee.ccu The router of CCU
INSA Information Networking Security and Assurance Lab National Chung Cheng University Description • NessusWX is a client program for Nessus security scanner which is designed specially for Windows platform • Version • 1.4.4 • Download • http://nessuswx.nessus.org/archive/nessuswx-1.4.4.zip
INSA Information Networking Security and Assurance Lab National Chung Cheng University Connect to nessus server
INSA Information Networking Security and Assurance Lab National Chung Cheng University Export to the MySQL Database (1/4) • First • Let the user can access database from the location The SQL command
INSA Information Networking Security and Assurance Lab National Chung Cheng University Export to the MySQL Database (2/4) • Second • Create the database and the tables (create_tables.txt)
INSA Information Networking Security and Assurance Lab National Chung Cheng University Export to the MySQL Database (3/4)
INSA Information Networking Security and Assurance Lab National Chung Cheng University Outline • Description & Feature • Operation mode • Installation • Example 1 (Unix-base) • Example 2 (Windows-base) • Summary
INSA Information Networking Security and Assurance Lab National Chung Cheng University An ounce of prevention is better than a pound of cure
Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response
Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response
Preface • The goal of an initial response: • Confirm there is an incident • Retrieve the system’s volatile data • OS: • Windows NT/2000/XP
Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response
What is important • Don’t affecting any potential evidence • Prepare a complete response toolkit • A live investigation is not the time to create or test your toolkit for the first time!!!
Preparing the Toolkit • Label the response toolkit media • Case number • Time and date • Name of the investigator who created the response media • Name of the investigator using the response media
Preparing the toolkit • Check for dependencies with Filemon • Determine which DLLs and files your response tools depend on • Create a checksum for the response toolkit • md5sum • Write-protect any toolkit floppies
Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response
Prelim • “live”: power on • Four options when retrieving information from a live system • The hard drive of the target system • In a notebook • Response floppy disk or other removable media • Remote forensic system using netcat or cryptcat
Transferring Data with netcat • Two advantage • Get on and off the target system quickly • Perform an offline review
Transferring Data with netcat 2 3 1 Time date loggedon fport pslist nbtstat -c NT System Forensic System 1: Run trusted commands on NT Server 2: Send output to forensics box via netcat 3: Perform off-line review md5sum output files
Transferring Data with netcat • Forensic workstation • Target system