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Our second example is a little more simplistic The @Userid syntax shown is characteristic of a Shiva LAN Rover remote access server (we still find these occasionally in the wild, although Intel has discontinued the product) With that tidbit and some quick research, attackers can learn more about LAN Rovers A good guess in this instance might be supervisor or admin with a NULL password You d be surprised how often this simple guesswork actually succeeds in nailing lazy administrators The third example further amplifies the fact that even simple knowledge of the vendor and model of the system answering the call can be devastating An old known backdoor account is associated with 3Com Total Control HiPer ARC remote access devices: adm with a NULL password This system is essentially wide open if the fix for this problem has not been implemented We ll just cut right to the chase for our final example: This response is characteristic of Symantec s pcAnywhere remote control software If the owner of system JACK SMITH is smart and has set a password of even marginal complexity, this probably isn t worth further effort, but it seems like even today two out of three pcAnywhere users never bother to set one (Yes, this is based on real experience!) We should also mention here that carriers aren t the only things of interest that can turn up from a war-dialing scan Many PBX and voicemail systems are also key trophies sought by attackers In particular, some PBXes can be configured to allow remote dialout and will respond with a second dial tone when the correct code is entered Improperly secured, these features can allow intruders to make long-distance calls anywhere in the world on someone else s dime Don t overlook these results when collating your wardialing data to present to management Exhaustive coverage of the potential responses offered by remote dial-up systems would take up most of the rest of this book, but we hope that the preceding gives you a taste of the types of systems you may encounter when testing your organization s security Keep an open mind, and consult others for advice, including vendors Probably one of the most detailed sites for banners and carrier-exploitation techniques is Stephan Barnes s M4phr1k s Wall of Voodoo site (http://wwwm4phr1kcom) dedicated to the war-dialing community (this link is available at the Hacking Exposed companion site) The site has been up through all six editions of this book and has kept constant vigilance on the state of war-dialing, along with PBX and voicemail hacking Assuming you ve found a system that yields a user ID/password prompt, and it s not trivially guessed, what then Audit them using dictionary and brute-force attacks, of course! As we ve mentioned, PhoneSweep comes with built-in password-guessing capabilities (which you should double-check), but alternatives exist for the do-it-yourself types THC s Login Hacker, which is essentially a DOS-like scripting language compiler, includes a few sample scripts Simple and complex scripts written in Procomm Plus s ASPECT scripting language exist These can try three guesses, redial after the target system hangs up, try three more, and so forth Generally, such noisy trespassing is not advisable on dial-up systems, and once again, it s probably illegal to perform against systems that you don t own However, should you wish to test the security of systems that you do own, the effort essentially becomes a test in brute-force hacking.

happens Depending on your security paradigm, you may also want to block ping sweeps We explore both options next Detection As mentioned, network mapping via ping sweeps is a proven method for performing network reconnaissance before an actual attack ensues Thus, detecting ping sweep activity is critical to understanding when an attack may occur and by whom The primary methods for detecting ping sweep attacks are network-based IDS programs such as Network Flight Recorder (NFR) and snort (http://wwwsnortorg/) or host-based mechanisms Shown next is the NFR N Code that can be used to detect network ping sweeps

* Dual authentication is not classic two-factor authentication, where the user is required to produce two types of credentials: something they have and something they know

# # # # # ICMP/Ping flood detection By Stuart McClure This will detect the use of a ping scanner on your network You can play with the maxtime and maxcount settings to find your sweet spot

@ 3450 r/min Oz-in 01461 01949 02923 03897 05846 14615 19486 29229 38972 41756 48715 58458 73073 97431 116917 146146 194861 243576 292292 365364 487153 730729 974305 mN-m 10320 13760 20640 27520 41281 103202 137602 206403 275204 294862 344005 412806 516008 688011 825613 1032016 1370027 1720027 2064032 2580040 3440053 5160080 6880107

In general, the further you go down the list of domains, the longer it can take to penetrate a system As you move down the domains, the scripting process becomes more sensitive due to the number of actions that need to be performed Now let s delve deep into the heart of our domains

ping_schema = library_schema:new( 1, [ "time", "ip", "ip", "ethmac", "ethmac" ], scope() ); count = 0; maxtime = 10; maxcount = 5; # a ping scan dest = 0;