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Every attack and penetration engagement offers a unique opportunity to discover volumes of information about a company and its computing infrastructure We start with Information Gathering, where we scour the Internet for publicly available information about the target company, such as what domains they own, what IP address blocks are assigned, where they house their DNS, and whether we can perform zone transfers on them We then move into Discovery, where we port-scan entire networks to find the services and programs running on available computers Next we move on to Enumeration, attempting to gather information about system specifics such as users, groups, shares, email addresses, and so on Finally, depending on the type and quality of the information gained in the earlier steps, we Attack! In one particular case, despite almost a week of work, we had not gained any significant access into their internal LAN, and we were feeling the pressure You never want to go into a project update meeting without significant results, as it can shatter the confidence of any client In this particular client engagement, we knew we had few real results to offer them, and the meeting scheduled for the next day would not be going away So late that night we decided to admit defeat in the meeting for the first time ever Being stubborn fools, we slept a couple of hours and decided to pick up the fight one last time We started by reviewing everything we had been able to collect to that point We had identified their public systems (one rogue Windows 95 system), determined their firewall rules (they were tight except for an LDAP service available), and dialed all 100 phone numbers with only one real lead We had dumped the users and email addresses from an Exchange LDAP server, so we had usernames, phone numbers, addresses, and so on, but social engineering was not part of the engagement Instead we turned to the only real progress we had made, one RAS modem, a list of users email addresses, and a Windows 95 share allowing us to read the user s email (in an Outlook PST file) We had gone through the user s email before, but decided to carefully read each and every one again, this time starting from the oldest email in the box Lo and behold, we came across what we call the cherry: a message from IT to All Employees stating their initial password is set to their last name Of course, further in the email they request that all users change their password immediately (and, of course, everyone complies with IT, right ) Dumbfounded as to how we could have missed this message earlier, we turned to our LDAP list of names and email addresses We knew each person s email account name (username), and we had their first and last name from the LDAP dump, but we had no systems to attack over the Internet Then we remembered the RAS dial-up modem we had found in the war-dialing exercise We had over 100 users from the LDAP dump and had tried the usual passwords to try to get in: no password, the word password, username as password, and some default passwords we like to use all with no luck Now we had a tip from their IT department: their initial password was set to their last name!. c# code 39 generator Code 39 C# DLL - Create Code 39 barcodes in C# with valid data
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C# .NET Code 39 generator to specify Code 39 images in Winforms and Web Forms, generate and save Code 39 in png, jpeg, gif, tiff, bmp image formats. With the adrenaline coursing through our veins, we quickly created a Procomm script to try the last names we obtained from the LDAP server as passwords on RAS We started dialing the RAS modem, trying each username and associated last name To our dismay, the script came to an end and we had nothing We were exasperated You mean to tell us that we have come across the only company in history to enforce their password policies Then someone asked: Are RAS passwords the same as NT passwords In other words, are they case sensitive We all looked at each other for what seemed like minutes but could have been only a second or two, and shot over to our war-dialing script We made the changes necessary to check for last names with the first character as capital Bingo! We had obtained complete access into their internal LAN from the outside We ran our automated attack scripts and gained Administrator and User access on 80 percent of their systems within an hour code 39 generator c# C# Code 39 Barcode Generator DLL - BarcodeLib.com
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Setting Code 39 Barcode Size in C# | Using C# .NET Barcode Generator SDK to control linear Code - 39 barcode image settings in C# . Although the interception attack may sound simple and straightforward, it s usually the one that impresses the most First, you need to intercept the RTP stream: you may sit somewhere on the path between the caller and the called persons, but that s not often the case anymore due to the use of switches instead of hubs To overcome this problem, an . attacker can employ ARP spoofing ARP spoofing works well on many enterprise networks because the security features available in switches today are not often activated, and end systems will happily accept the new entries Quite a number of deployments try to transport the VoIP traffic on a dedicated VLAN on the network to simplify the overall manageability of the solution as well as to enhance the quality of service An attacker should easily be able to access the VoIP VLAN from any desk, because the phone is generally used to provide connectivity to the PC and performs the VLAN tagging of the traffic On the interception server, you should first turn on routing, allow the traffic, turn off ICMP redirects, and then reincrement the TTL using iptables (it will be decremented because the Linux server is routing and not bridging this in the simple patch-o-matic extension to iptables), as shown here: c# code 39 barcode C# Code 39 Generator Library for .NET - BarcodeLib.com
NET Framework 2.0 or greater; Generate and draw Code 39 barcodes for .NET applications using Visual C# class library; Fully compiled in Visual C# , ... code 39 font c# Code39 Barcode Control For Windows Applications sample in C# ...
17 Dec 2011 ... This control generates the Code39 Barcode for any text. And also you can export or print the barcode by right clicking.You can download ...
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