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//0x8 bytes (sizeof)
struct _IMAGE_SECURITY_CONTEXT
{
    union
    {
        VOID* PageHashes;                                                   //0x0
        ULONGLONG Value;                                                    //0x0
        struct
        {
            ULONGLONG SecurityBeingCreated:2;                               //0x0
            ULONGLONG SecurityMandatory:1;                                  //0x0
            ULONGLONG PageHashPointer:61;                                   //0x0
        };
    };
};