Batchography: Reading a text file line by line in Batch files

This is yet another article about Batch files. In this article, I am going to show you how to read a text file line by line using the Batch files scripting language.

For more advanced Batch scripting topics, please grab a copy of the Batchography book.

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Hiew+ – Editing process memory with Hiew hex editor

What’s is Hiew+

Hiew+ is based on the FsPlus project. FsPlus is an implementation of an idea that allows you to access non disk files as if they were disk files. Hiew+ is a real life example of FsPlus where we take Hiew (an excellent hex editor) and turn it into an excellent process editor. Each process will be view as a file with a size as much as SYSTEM_INFO.lpMaximumApplicationAddress returns. In theory FsPlus should work with any hex editor to provide process memory editing, but this release is just Hiew ready.

Hiew+ editing the process memory of a process being debugged by IDA Pro

Usage

To use FsPlus, you need to inject FsPlus.dll into Hiew’s process memory so that the APIs are hooked. After APIs are hooked, FsPlus will recognize and treat in a different manner any file name that has the following form: “pid|1234” where 1234 is a given PID. To make the usage even simpler, we provided a small GUI (FsPlusGui) to allow you launch Hiew conveniently.

In fact, Hiew+ can be considered as a nice addition to IDA Pro‘s debugger or any other debugger. Here’s a small screenshot when you run FsPlusGui:

You will need to double click on a process to have Hiew or the desired process launched.
Make sure you specify the settings correctly in FsPlus.ini:

[settings]
title=Hiew+ (c) lallous <lallousz-x86@yahoo.com>
hookdll=.\fsPlus.dll
launch=c:\hiew\hiew32.exe

Features

After you run it successfully, you will be able to start editing processes as if you were editing files. The catch is every process virtual address is now a physical offset in Hiew.

Modules as IMAGE_SECTION_HEADERs

For your convenience we have created additional IMAGE_SECTION_HEADER structures in the PE header of the main process, so that each loaded module is view as a PE section:

Textual information about process’ modules

In addition to view modules as PE sections, you will have an actual representation of all loaded modules just after the end of the PE header:

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batchography-good-resDo you want to master Batch Files programming? Look no further, the Batchography is the right book for you.

Available in print or e-book editions from Amazon.
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No Read Errors

To avoid reading errors and such, any unreadable memory page is filled with “BAD!” pattern.

Physical and Logical disk editing

This is not something added by FsPlus, rather it is a “less” documented feature of Hiew32 where you can run it with a disks device name and have it edit the disk. Using the provided GUI you can easily do just that.

Conclusion

Download – Release date: late 2008

This tool has been tested with Windows Vista (32) and Windows XP SP2 and with Hiew 7.29.
Hope you find this tool useful as Hiew itself.
Note: Please don’t contact me if you run into trouble. This tool is no longer supported.

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Batchography: Converting numbers to characters (or the CHR() function)

In various programming languages, you might sometimes need to convert numbers to characters. In simple terms, each character you see has a numerical representation. The ASCII table  shows the numbers of each character and its corresponding glyph.

Converting numbers to their corresponding characters would be useful to generate a random string for instance. The first step to generating a random string is to generate random numbers between 65 and 90 (upper case ‘A’ to upper case ‘Z’) or between 97 and 122 (lower case ‘a’ to lower case ‘z’).

While the Batch language is pretty primitive, you would be surprised how many things you can do with it. In the Batchography book, I cover various topics that would bring your Batch programming skills to the next level.
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Batchography: How to do a “switch/case” in Batch files

You have found this blog post because you are wondering if there is a way to express a “switch/case” logic in Batch files.

The short answer is NO, not exactly. However, there are ways to achieve the same in Batch files.

In the Batchography book, I explain in details the “switch/case” construct, but in this blog post I will illustrate this mechanism briefly. For more advanced Batch scripting topics, please grab a copy of the Batchography book.

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Batchography: How to do string substitution in the Batch scripting language?

There are so many undocumented or obscure features in the Batch scripting language and in this article I am going to illustrate how to do string substitution.

For more advanced Batch scripting topics, please grab a copy of the Batchography book.

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Batchography – Programming the “Hangman game” using the Batch scripting language!

hangman-1In this blog post, I am going to share with you the high level steps needed to build the Hangman game using the Batch scripting language.

To learn more about how the Hangman is programmed using the Batch scripting language, please refer to Chapter 5 in the Batchography book.

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