Rule:

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Sid:
2176

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Summary:
This event is generated when an attempt is made to access a system
file via SMB. 

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Impact:
Serious. This file contains important operating system information.

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Detailed Information:
This event indicates that an attempt was made to access a file
containing important operating system information using SMB across the
network.

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Affected Systems:
Microsoft Windows systems.

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Attack Scenarios:
If this file is accessible via SMB the attacker can manipulate the
operating system registry settings.

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Ease of Attack:
Simple.

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False Positives:
None known.

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False Negatives:
None Known.

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Corrective Action:
Check the host for signs of system compromise.

Turn off file and print sharing on the target host.

Use a packet filtering firewall to disallow SMB access to the host from
sources external to the protected network.

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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:
Microsoft Technet
http://support.microsoft.com/support/kb/articles/q153/1/83.asp
CVE
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0562
Winreg
http://www.rutherfurd.net/python/winreg/

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