Questions tagged [memory]

Part of the computer used to store data and code. Can refer to questions about, both, live memory investigation and ROM investigation.

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3k views

How does a SIM card work?

I understand that a SIM card has memory, and that some or maybe all of them also include microprocessors. They act as peripherals that are more than just flash memory. I would like to be able to ...
15
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2answers
9k views

How to predict address space layout differences between real and gdb-controlled executions?

It's something that puzzle me for a long time. I can observe that there is a difference between the real execution of a program and the gdb-controlled one. But, here is an example: First, here is ...
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2answers
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Where is ntdll.dll?

I am trying to get the base address of ntdll.dll over the PEB. So, what I did was to dump the PEB (d fs:[30]). Then, I tried to get to PEB_LDR_DATA over the offset 0xC. Over the offset 0x1C of ...
4
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2answers
682 views

What is this hidden stack used by syscalls on Windows?

I've noticed there is a memory region in user mode on Windows 7 x64 WOW64 that changes during syscalls. It is located quite low in the address space and has the characteristics of a stack, i.e. it ...
7
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2answers
3k views

How to deal with Static Memory Allocation while modifying an executable?

I'm not new to StackExchange, but I'm quite new to reverse engineering, so please be patient with me! :P At present I'm dealing with an executable that I would like to modify a little bit, for ...
6
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3answers
7k views

Paste hex bytes into IDA Pro Hex View

Is it possible to paste a series of bytes into hex view of IDA? Say I have a large buffer I need to fill with a specific value, and I have it in the form most hex editors output... 0A AB EF FF 00 01......
1
vote
1answer
181 views

Is the value of EBP before the main function important?

So before we come to the main function, it looks we are in a function with a name __libc_start_main and before we come to our main function we obviously push EBP value in the stack ( the value of EBP ...
5
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3answers
4k views

Does code injected into process memory always belong to a page with RWX access?

I've seen a few memory forensics tutorials, which start by looking for injected code in the "victim's" process memory. They always seem to find the injected code in pages which have RWX access (i.e. ...
3
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2answers
283 views

Grouping functions based on their placement/order in the binary

Can I group functions based on their place in the binary? Can I assume functions next to each othe belong to the same logical group, or at least they have similar functionality? I suspect that the ...
2
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1answer
203 views

What values do I use for Freescale ARM imx233 μP in IDA Pro “memory layout dialog” for RAM and ROM?

What is the memory address information I should plug into IDA for this BIN file? GOAL: To disassemble a BIN file extracted from firmware.sb This BIN file contains the low level board initialization,...