Writing process memory in python
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Frida's writeByteArray failed with me to write in read only memory.
A quick solution was to send the bytes and the address I want to write at, to python.
Using ReadWriteMemory library it's really easy to write into process memory, also it has good documentation.
https://github.com/vsantiago113/ReadWriteMemory
import frida
from ReadWriteMemory import ReadWriteMemory
rwm = ReadWriteMemory()
process = rwm.get_process_by_id(YOUR_PROCESS_ID_HERE)
process.open()
def onmessage(message, data):
global process
message = json.loads(message['payload'])
if message['type'] == "patch":
ptr = message['address']
for idx, byte in enumerate(message['patch']):
process.write(ptr + idx, byte)
device = frida.get_local_device()
session = device.attach(YOUR_PROCESS_ID_HERE)
script = session.create_script(YOUR_JAVASCRIPT_CODE_STRING)
script.on("message", onmessage)
script.load()
and now in your Frida's JavaScript code, you can send a JSON like this
send(JSON.stringify({
type: 'patch',
address: ptr.toInt32(),
patch: [0x90, 0x90, 0x90]
}))