11 - Patch Lumion

Better: redirect the function to a code cave containing:

Find the ValidateLicense function entry:

This replaces call ... test eax, eax jz with mov al,1 and NOP sled. patch lumion 11

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:

Function SendActivationRequest was located in LumionNetworking.dll . The simplest patch is to make it return success without sending. Better: redirect the function to a code cave

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

Original:

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.