// Step 1: Identify target sections msg "Starting VMProtect analysis..." base_address = mod.base() section_start = base_address + 0x1000
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}"
// 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 vmprotect unpacker x64dbg
// When VirtualProtect hits, check for memory changes check_oep: cmp eip, VirtualProtect je analyze_memory jmp continue_execution
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)
analyze_memory: log "[+] VirtualProtect called - analyzing memory region" dump esp // Examine stack for protection changes // Step 1: Identify target sections msg "Starting
// 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..."
continue_execution: run
// Step 2: Set hardware breakpoints on common VM entry points bp mod.main() bp VirtualProtect bp VirtualAlloc bp GetProcAddress
// Step 3: Trace to find original entry point log "[*] Tracing to find Original Entry Point..." run
not_found: log "[-] OEP not found with pattern matching" #6A??68????????E8????????# // Push pattern cmp $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
def extract_unpacked(self): """Dump unpacked sections to memory""" # After unpacking, dump memory regions import struct # Map memory sections and write to file pass