4E5350304E5350300000000000000000 The encrypted section starts after the first 0x800 bytes. Use OpenSSL:
Simulate the XOR routine (Python snippet): another code nsp
The file is encrypted, but the developer left a clue: “Sometimes the key is right in front of you — just another code.” another code nsp
encryption: AES-128-CTR key hint: first 8 bytes of NSP0 magic repeated twice iv = 0x0000000000000000 The NSP0 magic is 4E 53 50 30 → ASCII NSP0 . Repeated twice → 4E 53 50 30 4E 53 50 30 . another code nsp