Multi-platform library for memory editing
mem_edit is a multi-platform memory editing library written in Python.
- Scan all readable memory used by a process.
- Optionally restrict searches to regions with read + write permissions.
- Report on address space allocation
- Read/write using ctypes objects
- Basic types, e.g.
- Arrays, e.g.
(ctypes.c_byte * 4)()
- Instances of
ctypes.Structure or ctypes.Unionand subclasses.
- Basic types, e.g.
- Run on Windows and Linux
- python 3 (written and tested with 3.7)
- typing (for type annotations)
Install with pip, from PyPI (preferred):
pip3 install mem_edit
Install with pip from git repository
pip3 install git+https://mpxd.net/code/jan/mem_edit.git@release
Most functions and classes are documented inline. To read the inline help,
import mem_edit help(mem_edit.Process)
Increment a magic number (unsigned long 1234567890) found in 'magic.exe':
import ctypes from mem_edit import Process magic_number = ctypes.ulong(1234567890) pid = Process.get_pid_by_name('magic.exe') with Process.open_process(pid) as p: addrs = p.search_all_memory(magic_number) # We don't want to edit if there's more than one result... assert(len(addrs) == 1) # We don't actually have to read the value here, but let's do so anyways... num_ulong = p.read_memory(addrs, ctypes.c_ulong()) num = num_ulong.value p.write_memory(addrs, ctypes.c_ulong(num + 1))
Narrow down a search after a value changes:
import ctypes from mem_edit import Process initial_value = 40 final_value = 55 pid = Process.get_pid_by_name('monitor_me.exe') with Process.open_process(pid) as p: addrs = p.search_all_memory(ctypes.c_int(initial_value)) input('Press enter when value has changed to ' + str(final_value)) filtered_addrs = p.search_addresses(addrs, ctypes.c_int(final_value)) print('Found addresses:') for addr in filtered_addrs: print(hex(addr))
Read and alter a structure:
import ctypes from mem_edit import Process class MyStruct(ctypes.Structure): _fields_ = [ ('first_member', ctypes.c_ulong), ('second_member', ctypes.c_void_p), ] pid = Process.get_pid_by_name('something.exe') with Process.open_process(pid) as p: s = MyStruct() s.first_member = 1234567890 s.second_member = 0x1234 addrs = p.search_all_memory(s) print(addrs) p.write_memory(0xafbfe0, s)
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