I have a question Supposed by using Openprocess and VirtualQueryEx, I have the locations of all the memory the application is using, wouldn't this to be true?
Say, a 8 byte data is somewhere in the region i am scanning. Ok, I know by scanning it like this for n in range(start,end,1) will read into another variable and mostly nothing, but unless a variable, that is, one number, can be truncated and exist in multiple locations like this double = 12345678 123 is at x001 45 is at x005 678 is at x010 unless a number can be broken up like that, wouldn't I, while use the silly 'increment by one' approach, actually luck out and get that value in it's actual position? On Mon, Oct 16, 2017 at 4:39 PM, Michael C <mysecretrobotfact...@gmail.com> wrote: > >>>Did you acquire the SeDebugPrivilege before calling? > > Eh, no. I don't know what that is! How do I get it? > > > > >>>That's a screwed up way of doing it. If you want buffers of 8 bytes, > then make a buffer of 8 bytes. > > So like this? > > ReadProcessMemory(Process, i, ctypes.byref(buffer), 8, ctypes.byref(nread)) > > >>> > I have no idea what you're asking. What you get back from > ReadProcessMemory is an untyped set of bytes. There is no way to find > out anything about the type. It might be strings, it might be machine > code, it might be header info, it might be floats, it might be images. > It could be ANYTHING. > No. What are you hoping to learn here? > > > Bummer... I thought with what I did, I was building a simple memory > scanner. > See, I thought with my ReadProcessMemory line I was retrieving values in > the size of doubles. > > I thought by doing what I did, by reading 8 bytes at a time, (the size of > doubles) I was effectively looking for values in my memory. I thought a > > for(start,end,8) > > would give me all the values of doubles since I believed that doubles > exist in the memory in the positions of base, base+8, base+16, base+24, > and so forth. > > failing that, at least > > for(start,end,1) > > would achieve the same thing. I would store the address containing the > doubles I want in a list() called hit_pool. And then the incorrect values > would be flushed out anyway, when I run a another run of comparing the > address found with target value. like this > > for n in hit_pool: > readprocessmemory(process, n, ctypes.byref(buffer), 8, > ctypes.byref(nread)) > > > > Since the way I am reading the memory is not correct, could you tell me > the correct way to do it? > > > Thanks! > > > > > > > > > > On Mon, Oct 16, 2017 at 2:54 PM, Tim Roberts <t...@probo.com> wrote: > >> Michael C wrote: >> > >> > I am working on my own memory scanner. It uses Windows API, >> VirtualQueryEX >> > and ReadProcessMemory. I am not sure I put down the following properly: >> > >> > I am sure >> > >> > Process = >> > Kernel32.OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ, False, >> > PID) >> > >> > ran properly, because it didn't return a 0. >> >> Did you acquire the SeDebugPrivilege before calling? >> >> > Lastly, ReadProcessMemory: >> > >> > 1st Question: The setup. >> > >> > buffer = ctypes.c_double() >> > nread = SIZE_T() >> > >> > ReadProcessMemory(Process, i, ctypes.byref(buffer), >> > ctypes.sizeof(buffer), ctypes.byref(nread)) >> > >> > >> > I used ctypes.c_double() to determine the size of the buffer, so does >> > this mean >> > that the value I retrieve would be doubles? As in, I know I want to >> > scan for double >> > values, therefore what I do is what I did here, ask ReadProcessMemory >> to >> > read 8 bytes at a time? >> >> That's a screwed up way of doing it. If you want buffers of 8 bytes, >> then make a buffer of 8 bytes. >> >> >> > Lastly, I don't understand this part about the memory: >> > >> > if I used VirtualQueryEx to find out if a region of memory is ok to >> > scan, and it >> > says it's ok, are the values in the region arranged like this: >> > >> > short,int,double,long,char, double, short in >> > >> > as in, random? >> >> I have no idea what you're asking. What you get back from >> ReadProcessMemory is an untyped set of bytes. There is no way to find >> out anything about the type. It might be strings, it might be machine >> code, it might be header info, it might be floats, it might be images. >> It could be ANYTHING. >> >> >> > I am asking this because, if it's random, then I'd have to run >> > ReadProcessMemory >> > by increasing the value of of my loop by ONE (1) at a time, like this >> > >> > for i in range(start_of_region, end_of_region, 1): >> > ReadProcessMemory(Process, i, ctypes.byref(buffer), >> > ctypes.sizeof(buffer), ctypes.byref(nread)) >> > >> > Is that correct? >> >> No. What are you hoping to learn here? >> >> -- >> Tim Roberts, t...@probo.com >> Providenza & Boekelheide, Inc. >> >> _______________________________________________ >> python-win32 mailing list >> python-win32@python.org >> https://mail.python.org/mailman/listinfo/python-win32 >> > >
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