Vmprotect Unpacker X64dbg Access

// Step 9: Breakpoint on section changes bp NtProtectVirtualMemory bp NtWriteVirtualMemory

continue_execution: run

continue_search: // Step 5: Find IAT redirection find base_address, #FF25????????# // JMP [address] pattern cmp $result, 0 je skip_iat log "[+] IAT redirection found at: {@result}" vmprotect unpacker x64dbg

// Step 3: Trace to find original entry point log "[*] Tracing to find Original Entry Point..." run

analyze_memory: log "[+] VirtualProtect called - analyzing memory region" dump esp // Examine stack for protection changes // Step 9: Breakpoint on section changes bp

def find_vm_entry(self): """Locate virtual machine entry point""" # VM handlers often have characteristic instruction sequences patterns = [ b'\x55\x8B\xEC\x83\xEC', # Standard prologue b'\xFF\x25', # Indirect JMP b'\xE8\x00\x00\x00\x00' # CALL $+5 ] return self.scan_memory(patterns)

def restore_iat(self): """Rebuild Import Address Table""" # VMProtect redirects IAT to its own handlers # Need to trace API calls and restore original addresses pass # Standard prologue b'\xFF\x25'

skip_iat: // Step 6: Memory dump section detection var sections = mod.sections() log "[*] Analyzing sections..."

// Step 8: OEP finder after unpacking completes find_oep: // Look for typical entry point patterns find base_address, #6A??68????????E8????????# // Push pattern cmp $result, 0 je not_found log "[!] Potential OEP candidate at: {@result}" oep_address = $result bp oep_address