// Step 4: Look for typical VMProtect patterns findpattern: find base_address, #558BEC83EC??53# // Common prologue pattern cmp $result, 0 je continue_search log "[+] Found potential VM handler at: {@result}"
skip_iat: // Step 6: Memory dump section detection var sections = mod.sections() log "[*] Analyzing sections..."
def extract_unpacked(self): """Dump unpacked sections to memory""" # After unpacking, dump memory regions import struct # Map memory sections and write to file pass vmprotect unpacker x64dbg
// Step 7: Locate OEP after unpacking bp VirtualProtect erun // Execute until VirtualProtect is hit
// 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 // Step 4: Look for typical VMProtect patterns
// Step 3: Trace to find original entry point log "[*] Tracing to find Original Entry Point..." run
// Step 10: Log all API calls for tracing logapi: log "[API] {@eip} - {@eax}" stepover jmp logapi Setting Breakpoints bp kernel32.VirtualAlloc bp kernel32.VirtualProtect bp ntdll.NtProtectVirtualMemory bp kernel32.GetProcAddress Memory Scanning // Search for VM entry point s 401000 L? E9???????? // JMP near pattern s 401000 L? 0F85???????? // JNE near pattern Tracing Execution // Step through virtualized code traceinto 10000 // Trace 10000 instructions tracetoggle Manual Unpacking Workflow # Python conceptual framework (not a working unpacker) class VMProtectAnalyzer: def init (self, target_path): self.target = target_path self.vm_handlers = [] self.oep = None #6A??68????????E8????????# // Push pattern cmp $result
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}"
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
analyze_memory: log "[+] VirtualProtect called - analyzing memory region" dump esp // Examine stack for protection changes