Archive | September, 2019

exe2powershell – Convert EXE to BAT Files


exe2powershell is used to convert EXE to BAT files, the previously well known tool for this was exe2bat, this is a version for modern Windows.

exe2powershell - Convert EXE to BAT Files


This will convert any binary file (*.exe) to a BAT file, the resulting BAT file contains only echo commands followed by a PowerShell command to re-create the original binary file.

This kind of tool can be useful during a pen-test when you want to trigger a shell without any upload feature. With echo and PowerShell the auditor is able to upload any binary file to the target system.

This version is modernized from exe2bat to work with current Windows versions as exe2bat had some limitations:

  • Needs debug.exe available on the target computer (16-bit application which was removed in Windows 7 x64 but available in Windows 7 x86)
  • Limits input exe size to 64kB

exe2powershell replaces the need of debug.exe by using a PowerShell command line which is available on all Windows since Windows 7 / 2008 and there is no more limitation in input exe size.

Usage of exe2powershell to Convert EXE to BAT Files

You can download exe2powershell here:

exe2powershell-master.zip

Or read more here.

Posted in: Windows Hacking

Topic: Windows Hacking


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HiddenWall – Create Hidden Kernel Modules


HiddenWall is a Linux kernel module generator used to create hidden kernel modules to protect your server from attackers. It supports custom rules with netfilter (block ports, hidden mode, rootkit functions etc).

HiddenWall - Create Hidden Kernel Modules


The motivation is basically another layer of protection, much like a hidden firewall – setting securelevel to 2 on BSD would have a similar effect.

In a typical attack, the bad actor can alter your IPTables or UFW rules – with HiddenWall you still have another layer that can block external access because it hooks directly into netfilter from kernel land.

The author created it to protect his own servers but realised it also helps people who can’t write low-level code roll their own customized, hidden kernel modules.

If you can write low-level code, you can always add more module templates to HiddenWall.

Installing HiddenWall to Create Hidden Kernel Modules

Verify if the kernel version is 3.x, 4.x or 5.x:

Clone the repository

Enter the folder

Edit your firewall rules in directory rules/server.yaml, the python scripts use that file to generate a new firewall module.

If you want to study the static code to generate, look the content at directory “templates”.

Then you would want to generate a kernel module following your YAML file of rules:

Then install it with insmod.

You can download HiddenWall here:

HiddenWall03.zip

Or read more here.

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