Here, the bypass demo is as follows: As we said earlier, in the article we are not practicing the tactics of modifying the. This class only contains a button click method as follows: It is basically hard-coding the license key as ABAB as follows: Finally, we bypass the second security restriction.įortunately, it is not in encrypted form and we can directly use it on the User Register interface. When we click over the Register button, another class Register is called, from where we can get the license key information. It is rather complicated to determine actually whether this class value is consumed or linked with other modules. From the aforementioned figure, we can conclude that on behalf of the status value of gData, some significant form of control-related operations occur implicitly, such changing the text value, visibility etc… If we investigate deeper the gData class necessity, we can achieve that it has a Boolean variable status which determines whether a registered user is trying to login or if he is carrying on in trail period.īased on the value of this variable, some implicit actions are performed as described earlier. So, it is not easy to trace back the calling of a crucial module. InfoSec File Download Dissembling to Crack Serial Keys Software code typically resides in multiple modules and it is interlinked together so that code is placed in one module and called from a different module. Fill out the form below to download the accompanying lab files. So, if we try to dissemble the source code of this target software, we might get some useful information and could bypass this mechanism in terms of saving dollars. But we have no idea how this mechanism works implicitly, how the vendor provides the license key to the user. If the user decides to buy the full version, it is obvious to obtain the License key code by registering over the vendor website. In the meantime, we can continue with the evaluation version. Now, we are going to encounter the rest of security constraints, such as revealing the license key and understanding the user authentication mechanism.ĭownload Target Software As we have seen, our target software offers a 15 day trail, and after that it will expire automatically. This software offers many security restrictions, and we have obtained sensitive information about the Trail Duration restriction in the previous article. We have been performing the entire reverse engineering tactics over our custom made software called Champu. It was basically a kick-start about this dissembling tool in terms of presenting its features and advantages. Abstract We have already got the taste of reverse engineering with Reflector in the previous paper. We analyze your responses and can determine when you are ready to sit for the test. Practice for certification success with the Skillset library of over, practice test questions.

Reflector 2 crack file