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The most fundamental change introduced into the NT Family by Windows 2000 is the addition of a Lightweight Directory Access Protocol based directory service that Microsoft calls Active Directory (AD) AD is designed to contain a unified, logical representation of all the objects relevant to the corporate technology infrastructure Therefore, from an enumeration perspective, it is potentially a prime source of information leakage The Windows XP Support Tools (wwwmicrosoftcom/downloads/details aspx FamilyID=49ae8576-9bb9-4126-9761-ba8011fabf38&displaylang=en) include a simple LDAP client called the Active Directory Administration Tool (ldpexe) that connects to an AD server and browses the contents of the directory An attacker can point ldpexe against a Windows 2000 or later host and all of the existing users and groups can be enumerated with a simple LDAP query The only thing required to perform this enumeration is to create an authenticated session via LDAP If an attacker has already compromised an existing account on the target via other means, LDAP can provide an alternative mechanism to enumerate users if NetBIOS ports are blocked or otherwise unavailable We illustrate enumeration of users and groups using ldpexe in the following example, which targets the Windows 2000 domain controller bigdclabfarce2org, whose Active Directory root context is DC=labfarce2, DC=org We assume the Guest account on BIGDC has already been compromised it has a password of guest Here are the steps involved: 1 Connect to the target using ldp Open Connection | Connect and enter the IP address or DNS name of the target server You can connect to the default LDAP port, 389, or use the AD Global Catalog port, 3268 Port 389 is shown here:

who has used revision marks in the document You may need to change the name for example, if two or more people have reviewed the document 4 To reach the full range of comparison choices, click the More button Word displays the remainder of the Compare Documents dialog box (see Figure 10-3) or Combine Documents dialog box 5 In the Comparison Settings area, select the check box for each item you want to compare or combine

3:

FIGURE 10-3

Another real threat to an organization s security can come from disgruntled employees, exemployees, or sites that distribute sensitive information about an organization s

The Comparison Settings area of the Compare Documents dialog box (shown here) or Combine Documents dialog box lets you choose which items to compare or combine

internal dealings If you ask anyone about disgruntled employee stories, you are likely to hear some pretty amazing tales of revenge It s not uncommon for people to steal, sell, and give away company secrets; damage equipment; destroy data; set logic bombs to go off at predetermined times; leave back doors for easy access later; or perform any number of other dubious acts This is one of the reasons today s dismissal procedures often include security guards, HR personnel, and a personal escort out of the building One of Google s advanced searches, link: wwwcompanycom, reveals any site that Google knows about with a link to the target organization This can prove to be a good way to find nefarious sites with information about the target organization

6 In the Show Changes area, choose the level of changes and the document in which to show them:

The search engines available today are truly fantastic Within seconds, you can find just about anything you could ever want to know Many of today s popular search engines provide for advanced searching capabilities that can help you home in on that tidbit of information that makes the difference Some of our favorite search engines are

analyze the changes to each character Usually, it s better to select the Word Level option button to make Word analyze the changes word by word, as this produces fewer changes

1:

Figure 1-5 Searching The Memory Hole focuses on information about government reports and scandal, but it can be quite revealing

put the changes in a new document Otherwise, select the Original Document option button or the Revised Document option button as appropriate 7 Click the OK button Word analyzes the changes and then displays the document you speci ed (a new document, the revised document, or the original document) with the changes integrated

http://wwwgooglecom, http://searchyahoocom, http://wwwaltavistacom, and http://wwwdogpilecom (which sends your search to multiple search engines such as Google, Yahoo, Microsoft Live Search, and Askcom) It is worth the effort to become familiar with the advanced searching capabilities of these sites There is so much sensitive information available through these sites that there have even been books written on how to hack with search engines for example, Google Hacking for Penetration Testers Vol 2, by Johnny Long (Syngress, 2007) Here is a simple example: If you search Google for allinurl:tsweb/defaulthtm, Google will reveal Microsoft Windows servers with Remote Desktop Web Connection exposed This could eventually lead to full graphical console access to the server via the Remote Desktop Protocol (RDP) using only Internet Explorer and the ActiveX RDP client that the target Windows server offers to the attacker when this feature is enabled There are literally hundreds of other searches that reveal everything from exposed web cameras to remote admin services to passwords to databases We won t attempt to reinvent the wheel here but instead will refer you to one of the definitive Google hacking sites

dialog box, telling you that it will consider the changes to have been accepted for the purposes of the comparison Click the Yes button to proceed with the comparison