Questions tagged [hex]

Format in which is visualized the memory content or the variables while memory inspection. Hexadecimal (or 'hex') represents integers in base 16 (with digits taken within `0`-`9` and `a`-`f`).

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Restore function key

I have a simple function which looks like that: keyAlphabet = [-1, 16, 32, 127, 61, -32, -31, 43, 0, 88, 2, 5, 7, 112, 64, 69, 96] key = ??? # only keyAlphabet values p = 0x1337 for i in key: ...p*=i ...
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How can I see specific memory value by using Hex view in IDA?

I'm about to use IDA pro. I have to access to 0018F42C(EAX) by using Hex view in IDA. Maybe I guess there is EAX value.(String is "happyy", standard input) but Hex view shows me 0018F410 as in screen1....
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Reverse Intel hex to programming code

I have a file in the Intel hex format, which was taken of from a pic16F1705 chip. I need to find a way to disassemble it into some form of human friendly programming language in order to make some ...
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What does the “Offset to the filename” stands for in an Index Record in NTFS

The structure of the Index Record in NTFS 3.1 is clear: Offset Description ------------------------------------- 0x00 MFT Reference of the file 0x08 Size of the index entry 0x0A ...
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264 views

Analyzing Game Map/Terrain Format

I'm trying to understand how this game builds the map and terrain. Specially if it uses a heightmap. So I can write an app that can view the map and move around (camera) freely. First, I'm not ...
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74 views

Work out packet structure from usb capture

Im hoping to understand the way a auto diagnostics tool is reporting data over usb. I've made a usb capture to look for changes according to known changes to the input it measures. The measurement is ...
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297 views

Reversing raw byte storage scheme on BusyBox-based network video recorder

I have a network video recorder - the Swann NVR8-7085. It had telnet enabled and I managed to figure out the user/pass to get in (I downloaded the firmware from the site, extracted the squashfs ...
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25 views

Reverse engineering chinese headunit eeprom

I've got a cheap chinese headunit in my car which i love, but i can't stand the boot logo. Main Components: AllWinner F1C200s processor EN25Q64-104HIP eeprom I bought a programmer and dumped the ...
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37 views

Editing assembly language to bypass the condition

I want to edit the compiled DLL code to bypass the variable checking condition. I tried to change the value in the condition but it causes an application crash. How can I "remove" this ...
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24 views

How to select/copy only text characters from HXD?

Suppose you want only the text characters from a file with a bunch of other stuff in there too. Is there anyway to select only the ASCII characters? The text view in HXD shows everything else too.
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81 views

Checksum in CANbus Message

I'm trying to work out the calculation method for a checksum in a CAN message but I'm having some difficulties. I am unsure if there are actually 4 separate checksums, or one big one at the end of ...
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2answers
109 views

IDA hex != String

, Hello. to learn reverse engineering, I would like to simply change a string via IDA. I select my string, get the adress, and select Change Bytes to get the Hex value : After That, I try to convert ...
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36 views

N64 ROM file index hacking issue

Alright, I downloaded the N64 SDK and compiled one of the samples provided by the SDK and dissembled the ROM with IDA and found the asset data is stored some way using index's so my question is. What ...
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Tool for navigating native assembler code and memory hex for interpreted languages like VBA

Complete newbie to this area and I have limited experience writing code in low level languages so I'm not familiar with the debugging techniques, but bear with me:). I'm trying to understand the ...
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46 views

Means of generating file hashes

I'm working with a relatively well secured program. In addition to memory validation checks during run time, the actual file integrity is checked at start. Both checks are synced with the server and I'...