Copyright 2001 Marchany, SANS Institute1 Auditing Networks, Perimeters and Systems Appendices/Supplemental Material The SANS Institute

Copyright 2001 Marchany, SANS Institute2 APPENDIX 1  The following matrices are examples of your matrix reports –Exhibit A (ASSET Matrix) –Exhibit B (ASSET WEIGHT Matrix) –Exhibit C (RISKS Matrix) –Exhibit D (RISK WEIGHT Matrix) –Exhibit E (ASSET-RISK Matrix) –Exhibit F (CONTROLS Matrix)

Copyright 2001 Marchany, SANS Institute3 APPENDIX 2 The following spreadsheets are the compliance reports. Overall Compliance Report that lists the general vulnerabilities a system has. This is a quick 1 page report for mgt. or the auditors. Asset/Risk Matrix list whether a system is affected by a risk. The risks are more specific. Controls Matrix lists what controls are in place for a given system. Individual Action Matrix lists the details of an audit for each node. Did the system comply?

Copyright 2001 Marchany, SANS Institute4 APPENDIX 3  The following checklist gives the detailed commands to be performed in the “audit”.  The categories are based on the Risk Matrices in Appendix 1.  The results of the checklist commands are inserted in the Compliance matrices of Appendix 2.  This checklist and the matrices form the overall audit/security checklist package.

Copyright 2001 Marchany, SANS Institute5 APPENDIX 4  Your company’s response policy will dictate the degree of audit record keeping you’ll have to maintain.  There are 2 strategies: –Protect and Proceed –Pursue and Prosecute

Copyright 2001 Marchany, SANS Institute6 Incident Handling: Protect and Proceed ? - Which strategy should your organization follow to handle an incident? This dictates the level of record keeping needed to fulfill the strategy. (RFC2196) - the protection and preservation of site facilities - return to normal operations as soon as possible - actively interfere with intruder attempts - begin immediate damage assessment and recovery Use if: - assets are not well protected - continued penetration could result in financial risk - possibility or willingness to prosecute is not present - user community is unknown - unsophisticated users and their work is vulnerable - the site is vulnerable to lawsuits from users if their resources are undermined

Copyright 2001 Marchany, SANS Institute7 Incident Handling: Pursue and Prosecute? - allow intruders to continue their activity until the site can identify them. This is recommended by law enforcement agencies - Use if: - system assets are well protected - good backups are available - asset risks are outweighed by risk of future penetrations - it's a concentrated and frequent attack - the site has a natural attraction to intruders, e.g. university, bank - the site is willing to spend the money and risk to catch the guy - intruder access can be controlled - well-developed monitoring tools are available - you have a technically competent support staff - management is willing to prosecute - system administrators know in general what evidence will aid in prosecution - there is established contact with law enforcement agencies - the site has involved their legal staff

Copyright 2001 Marchany, SANS Institute8 Appendix 5 – CIS Rulers  The current CIS rulers are included here. A sample Solaris Level 1 ruler is included.  The NT rulers are incomplete at this date (3/6/01) but should be available in the summer.  The VT AD ROE is available at

Copyright 2001 Marchany, SANS Institute9 Appendix 6 – AUP Example  This appendix contains the VA Tech Acceptable Use Policy and the Acceptable Use Guidelines

Copyright 2001 Marchany, SANS Institute10 References –“Time Based Security”, Winn Schwartau, Interpact Press, 1999, ISBN: The discussion on TBS was derived from this text. –“Firewalls and Internet Security”, Cheswick & Bellovin, Addison-Wesley, 1994, ISBN: –RFC 2196, Guide to Writing a Site Security Policy –

Copyright 2001 Marchany, SANS Institute11 References  The complete Top 10 document can be found in the appendix.  Some WWW sites to visit: – – – – – – –

Copyright 2001 Marchany, SANS Institute12 Course Revision History