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