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Nessus

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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Nessus

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  1. INSA Information Networking Security and Assurance Lab National Chung Cheng University http://www.nessus.org Nessus A Vulnerability Assessment tool A Security Scanner

  2. 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

  3. 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

  4. 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

  5. INSA Information Networking Security and Assurance Lab National Chung Cheng University Feature • Free • Powerful • Fast • Modular architecture • Reliable • Up-to-date (#nessus-update-plugins)

  6. 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

  7. INSA Information Networking Security and Assurance Lab National Chung Cheng University The Client-Server Architecture Nessus Client WWW FTP Mail Nessus Server-nessusd Proxy

  8. 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

  9. 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

  10. 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!!

  11. INSA Information Networking Security and Assurance Lab National Chung Cheng University Start

  12. Add User The command User name The way of auth Type the password The rule set for the user

  13. INSA Information Networking Security and Assurance Lab National Chung Cheng University Start nessusd Run the nessusd as daemon!! Loading the plugins

  14. 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

  15. linux.ee.isu Environment The router of EE The router of ISU Internet WJL.ee.ccu The router of CCU

  16. Configuration of nessus client

  17. INSA Information Networking Security and Assurance Lab National Chung Cheng University Start the scan

  18. INSA Information Networking Security and Assurance Lab National Chung Cheng University Report

  19. INSA Information Networking Security and Assurance Lab National Chung Cheng University Report with HTML Format

  20. 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

  21. linux.ee.isu Environment NessusWX The router of EE The router of ISU Internet WJL.ee.ccu The router of CCU

  22. 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

  23. Setting

  24. INSA Information Networking Security and Assurance Lab National Chung Cheng University Connect to nessus server

  25. Create a session

  26. Execute

  27. View the result

  28. Report with HTML Format

  29. 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

  30. 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)

  31. INSA Information Networking Security and Assurance Lab National Chung Cheng University Export to the MySQL Database (3/4)

  32. Export to the MySQL Database (4/4)

  33. 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

  34. INSA Information Networking Security and Assurance Lab National Chung Cheng University An ounce of prevention is better than a pound of cure

  35. Live Data Collection from Windows System

  36. Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response

  37. Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response

  38. Preface • The goal of an initial response: • Confirm there is an incident • Retrieve the system’s volatile data • OS: • Windows NT/2000/XP

  39. Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response

  40. 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!!!

  41. The Utility (I)

  42. The Utility (II)

  43. 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

  44. 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

  45. Outline • Preface • Creating a Response Toolkit • Storing Information Obtained during the Initial Response • Obtaining Volatile Data • Performing an In-Depth Live Response

  46. 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

  47. Transferring Data with netcat • Two advantage • Get on and off the target system quickly • Perform an offline review

  48. 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

  49. Transferring Data with netcat • Forensic workstation • Target system

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