Patch Lumion 11 [LATEST × SERIES]

Better: redirect the function to a code cave containing:

Original:

; At SendActivationRequest entry mov eax, 1 ; return success ret 16 ; clean stack (adjust according to calling convention) Overwrite the first 5 bytes with B8 01 00 00 00 C3 . However, stack cleanup requires matching the original function's calling convention ( __cdecl or __fastcall ).

Lumion is a real-time 3D rendering software heavily used in architecture. Version 11 introduced enhanced licensing security, including server-side key validation and local obfuscation. Before any patching, the following protection layers were identified: patch lumion 11

After patching, the software shows "License: Pro" in About menu, no watermark, and export functionality is unlocked. 11. Countermeasures and Detection Lumion 11 may include integrity checks on its DLLs (CRC32 or embedded hash). If checksums are validated, the patched DLL will be rejected, and the program may crash or revert to trial.

Function SendActivationRequest was located in LumionNetworking.dll . The simplest patch is to make it return success without sending.

call LumionLicense::ValidateLicense test al, al jz license_invalid Change the function prologue or the return value. Better: redirect the function to a code cave

Find the ValidateLicense function entry:

original: push rbp mov rbp, rsp ... (validation logic) xor al, al ; return 0 (false) pop rbp ret patched: push rbp mov rbp, rsp ... (validation logic) ; can be NOP'd out mov al, 1 ; return 1 (true) pop rbp ret

Pattern: 48 8B 4C 24 08 48 85 C9 74 ?? E8 ?? ?? ?? ?? 85 C0 This pattern leads to a function named IsLicenseValid() in pseudocode. The simplest patch (used in many public “cracks”) is to force the license validation function to always return true (1) and skip network activation. eax jz with mov al

This replaces call ... test eax, eax jz with mov al,1 and NOP sled.

call ValidateLicense test al, al jz 0x... ; jump if invalid Patch jz to jmp always (EB opcode in x86) or NOP out the test and force the branch. Lumion 11 also tries to validate the license online at launch and every 24 hours. The patch must also disable this.