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    GameShield Manual Unpacking and Modifying Licenses

    Manual unpacking of GameShield v4.5

    Author: SSlEvIN [ARTeam]

    Document format : PDF

    Table of Contents

    Verification
    1. Manual unpacking of GameShield v4.5
    • 1.1. Abstract
    • 1.2. Targets
    • 1.3. Tools used

    2. General unpacking approach for all GameShield targets
    • 2.1. At first glance (nothing important, but nice to know)
    • 2.2. Unpacking it (at last...)
    • 2.3. Dumping – (P)assion (A)ccording to (ST.) pe_h(E)ader
    • 2.4. Fixing imports
    • 2.5. Dump/Fix GameShield BuyOnly targets
    • 2.6. Playing GameShield targets "for this execution only"

    3. Conclusions

    4. Greetings

    Additional Stuff in Tutorial

    CoA_DLL.dll is GameShield protector dll extracted and rebuilded from the game Call of Atlantis, thus this somewhat weird name.

    Modifying GameShield Licenses

    Author: Nieylana [ARTeam]

    Document format : PDF

    Table of Contents

    1. Modifying GameShield Licenses
    • 1.1. Abstract
    • 1.2. Targets
    • 1.3. Tools Used

    2. Reversing the Shell
    • 2.1. Finding/Dumping Protection DLL
    • 2.2. Analyzing DLL
    • 2.3. Recap Attack Method

    3. Intercepting Information
    • 3.1. Find License File Password
    • 3.2. Investigating Blowfish
    • 3.3. Decrypt Key Problem (and solution)

    4. License Modification
    • 4.1. Decrypt License Data
    • 4.2. Making Changes
    • 4.3. Repacking License

    5. Final Thoughts

    6. Greetings

    Additional Stuff in Tutorial

    GameShield License Decryptor
    ZlibTool - Packer/unpacker for zlib 1.1.4
    Simple Target for Training

    Please register or login to download attachments.


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