2 T-CARD, GERMAN TELEKOM'S CALLING CARD
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6 I think, it was a year ago, when I first heard about a new calling card,
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7 this time by German Telekom. The history of calling card fraud is very long,
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8 because AT&T, MCi, Sprint and other phone companies made it possible for many
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9 hackers and phreakers all over the world to make free phone calls very easy.
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10 Now German Telekom offers the same service?! I think many guys tried to hack
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11 those new cards, but I've never heard of a big success. There are several
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12 different types of T-Cards, one is called T-CARD25 which is a pre-paid card
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13 with an amount of 25 DM (18 $) - the other one is a charge card.
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14 The cardholder will get a bill every month. On this bill all called phone
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15 numbers are listed, but with XXX instead of the last three digits.
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16 There are three possibilities to pay for your card: Together with your normal
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17 phone bill, with a credit card or you give the permission, that Telekom will
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18 take it from your bank account. In my new school, we must work in a local
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19 company for a few weeks, to get the feeling of the real live. I looked up the
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20 list and found out, that I must work for German Telekom. With an evil grin
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21 I went home... There were a lot of things to do at Telekom, one fine thing
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22 was, that I was able to make free calls, without having problems. There's
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23 a big room there filled with ISDN phones from where you can make private calls.
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24 One day, I called the Telekom Business Service and asked some questions.
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25 The operator there noticed my Telekom internal Caller ID and she started
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26 talking with me about many things. I got the answers to some difficult
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27 questions, and she gave me an internal number for detailed technical
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28 informations. "Don't give out this number to customers!" she warned me and
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29 again I left the room with an evil grin on my face. One other day, an old
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30 guy asked if there's is somebody who knows about T-Cards. He quickly noticed
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31 that I'm more intelligent than the average Telko pig and an hour later I found
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32 myself in a small room with a phone and a list full of Telekom internal calling
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33 card numbers. I became an official T-Card System Tester. We tried a lot of
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34 things and in one test, Telekom wanted to find out how many callers can call
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35 the computer at the same time, before it will shut down. I made calls to the
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36 whole world, and more and more testers all over the country invaded the system.
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37 The automated voice talked slower, simple options took over one minute to
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38 complete. Again, I made some calls and checked the account information.
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39 I noticed that the last calls weren't billed. Interesting...
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40 The internal cards were interesting, too. They acted like charge cards, but
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41 they had a 50 DM (36 $) limit per month. The card computer itself is very
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42 intelligent, it is able to learn the habits of a customer, e.g. which countries
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43 he calls normally and how long he's talking. A further security measure is,
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44 that after three wrong pin entries, the card will be locked for further calls
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45 until the owner of the card calls the operator. Every customer can choose
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46 a password/passphrase for such actions, because the operator must be sure
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47 that the caller is really the cardholder. Sometimes they even make a callback
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48 verification. You can use T-Cards in over 50 countries. I just tell you the
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49 numbers of the most important countries.
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52 Australia (Telstra) 1800-881-490
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53 Australia (Optus) 008-5511-49
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54 France 19-(wait for second dialtone)-0049
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55 Great Britain (BT) 0-800-89-0049
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56 Great Britain (Mercury) 0-500-89-0049
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57 Hawaii 1-800-865-0049
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59 Irland 1-800-55-0049
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62 Japan (KDD) 0039-491
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63 Japan (IDC) 0066-55-449
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64 Canada 1-800-465-0049
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65 Netherlands 06-022-0049
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69 South Africa 0800-99-0049
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70 USA (AT&T) 1-800-292-0049
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71 USA (MCi) 1-800-766-0049
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72 USA (US-Sprint) 1-800-927-0049
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74 How to use a hacked card?
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76 1. Dial the access number
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77 2. Press 1 for T-Card Service (if you're not calling from Germany)
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78 3. Choose language: Press 1 for German, 2 for English and 3 for French
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79 4. Enter Cardnumber and PIN then press #
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80 5. Enter the number you wish to call dial 00+country code+number and press #
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81 Instead of dialing a number you can access a submenu with *1#
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82 Listen to the voice what you can do there.
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84 Charge cards have the following format 8XXX XXXX XXXX + PIN (4 digits)
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85 Pre-paid card have no PIN number, which makes them easy to hack, as if you
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86 know a valid pre-paid card number you can easily guess new numbers.
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87 They're not in sequence, but if 8214 1234 1234 is a valid card you can guess
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88 some valid cards easy. But 18 $ is not very much, so concentrate hacking
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89 the real ones. They came in two envelopes and the second letter arrives
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90 about one or two days later. One letter contains the card, and the other the
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91 PIN number. This should make stealing difficult, but wait... My card arrived
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92 in July 95 and the temporary pin was 9507. Got the point?
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93 I know it's difficult to hack one of these card, but if you have one, you'll
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94 have much phun. I'm abusing one of the test cards for 6 month now. Customer
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95 cards will often work a whole month. I think that's worth it.
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projects / oweals / thc-archive.git / blob