Rule:--Sid:2980--Summary:This event is generated when an attempt is made to access an administrative share on a Windows machine.--Impact:Serious. Possible administrator access on the victim machine. --Detailed Information:This rule  generates an event when the hidden Netbios share Admin$, which is the Winnt directory, is accessed via SMB. This is a poor security practice or an indication that a machine is being accessed remotely. --Affected Systems:Windows 9xWindows 2000Windows XP--Attack Scenario:This can be accessed from GUI "map network drive" remotely --Ease of Attack:Simple--False Positives:None known.--False Negatives:None known.--Corrective Action:Use a packet filtering firewall to disallow Netbios access from the unprotected network.--Contributors:Original Rule Writer UnknownSourcefire Vulnerability Research TeamNigel Houghton <nigel.houghton@sourcefire.com>Snort documentation contributed by Jake Babbin --References:--