\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{therealdash}
\pdfinfo{
  /Title (x86-32-shellcode-lab.pdf)
  /Creator (Cheatography)
  /Author (therealdash)
  /Subject (x86\_32 Shellcode-Lab Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
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\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{x86\_32 Shellcode-Lab Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{therealdash} via \textcolor{DarkBackground}{\uline{cheatography.com/196544/cs/41321/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}therealdash \\
  \uline{cheatography.com/therealdash} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 16th November, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{1.94103 cm} x{3.03597 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB - Gnu Debugger - Initiation}}  \tn
% Row 0
\SetRowColor{LightBackground}
gdb -q ./\textless{}file\textgreater{} & Start GDB in quiet mode \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
gdb -p \textless{}pid\textgreater{} & Attach to process-id \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
gdb -c \textless{}core\textgreater{} ./\textless{}file\textgreater{} & Load up a core file and the program \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Those commands are executed to start GDB.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.19002 cm} x{0.96117 cm} x{2.42581 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Run a program}}  \tn
% Row 0
\SetRowColor{LightBackground}
run & r & Start the program \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
run testarg & r testarg & Start with an argument \tn 
% Row Count 3 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.73926 cm} p{0.68655 cm} x{2.15119 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Registers}}  \tn
% Row 0
\SetRowColor{LightBackground}
info registers & i r & Show default registers \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
info registers all & i r a & Show all registers \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
info registers eax & i r eax & Show EAX register \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\SetRowColor{LightBackground}
\mymulticolumn{3}{x{5.377cm}}{Commands for showing the content of registers.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.59264 cm} x{3.38436 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Examine}}  \tn
% Row 0
\SetRowColor{LightBackground}
x \$eax & Examine address in EAX \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x/i \$esp & Examine address at ESP interpret as instruction \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
x/s 0xffffffab & Examine address interpret as string \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
x/4s 0xffffffab & Print from that address 4 times \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
x/4xb & Examine in HEX repeat 4 times show in Bytes \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
disassemble / disas & Disassemble at current position \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
disas \_start & Disassemble from label \_start \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
print / p system & Print address of libc system \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Note: Examine needs valid addresses to function. Unit sizes: b, Bytes; h, Halfwords (two bytes);w, Words (four bytes); g, Giant words (eight bytes).}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.19002 cm} x{0.9154 cm} x{2.47158 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Breakpoint}}  \tn
% Row 0
\SetRowColor{LightBackground}
break \_start & b \_start & Set a breakpoint at the label \_start \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
break 5 & b 5 & Breakpoint at source line 5 \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
break \seqsplit{*0x44332211} & b \seqsplit{*0x44332211} & Breakpoint at address/offset \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.96117 cm} p{0.4577 cm} x{3.15813 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Stepping}}  \tn
% Row 0
\SetRowColor{LightBackground}
step & s & Step per line of source. \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
stepi & si & Step per machine instruction \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{continue} & c & Continue program execution \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.53827 cm} x{2.43873 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB - Commands - Set and Call}}  \tn
% Row 0
\SetRowColor{LightBackground}
call (int) mprotect(0xDEADBEEF, 0x1000, 1) & Execute mprotect() in debugee context. \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
call strcpy(0xdeadbeef, "hacky") & Write hacky to addr 0xdeadbeef \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
set follow-fork-mode child & Follow newly created childs \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
set {\emph{(char {[}SIZE{]} }}) 0xdeadbeef = "my\_new\_array" & Write data to address \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
set \{int\}0xdeadbeef = 4 & Set value at address to 4 \tn 
% Row Count 12 (+ 2)
% Row 5
\SetRowColor{white}
set \$eax = 0xdeadbeef & Set value of register EAX to 0xdeadbeef \tn 
% Row Count 15 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.51041 cm} p{0.4577 cm} x{2.60889 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{GDB-GEF - Overview}}  \tn
% Row 0
\SetRowColor{LightBackground}
gdb-gef &  & Start gdb-gef at commandline \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
gef help &  & Show help of GEF \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
start &  & Start program with auto breakpoints set \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
kill &  & Kill current process \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
context & ctx & Show context \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
checksec &  & Check security features \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
vmmap &  & Show virtual memory map \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
\seqsplit{python-interactive} & pi & Start Python Interpreter \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\seqsplit{python-interactive} 23*5 & pi 23*5 & Use python interpreter and calculate \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.63781 cm} x{2.33919 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB-GEF - Configuration}}  \tn
% Row 0
\SetRowColor{LightBackground}
gef config & Show running configuration \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
gef config context & Configure GEF context \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
gef config \seqsplit{context.show\_opcode\_size} 8 & Set the opcode output to length of 8 \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
gef config context.layout "legend regs stack memory" & Set only for widgets as output \tn 
% Row Count 9 (+ 3)
% Row 4
\SetRowColor{LightBackground}
gef save & Save running configuration \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Extra configurations for GDB-GEF}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.78712 cm} x{2.18988 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GCC - Overview}}  \tn
% Row 0
\SetRowColor{LightBackground}
gcc -m32 \textless{}input\textgreater{} -o \textless{}output\textgreater{} & Compile source for x86\_32 arch. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
gcc -m32 \textless{}input\textgreater{} -o \textless{}output\textgreater{} -z execstack & Compile with executable stack \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
gcc -m32 \textless{}input\textgreater{} -o \textless{}output\textgreater{} -g & Compile with debug symbols \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.33919 cm} x{2.63781 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{NASM - Overview}}  \tn
% Row 0
\SetRowColor{LightBackground}
nasm -f elf32 \textless{}input\textgreater{} -o \textless{}output\textgreater{}.o & Creates x86\_32 object file from assembly. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
ld -m elf\_i386 \textless{}input\textgreater{}.o -o \textless{}output\textgreater{} & Create x86\_32 ELF from object file \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.38896 cm} x{2.58804 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{OBJDUMP - Overview}}  \tn
% Row 0
\SetRowColor{LightBackground}
objdump -d -M intel \textless{}file\textgreater{} & Dump the opcodes in Intel Syntax \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
objdump -s -j \textless{}section\textgreater{} \textless{}file\textgreater{} & Dump only named section \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.43873 cm} x{2.53827 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{STRACE - Overview}}  \tn
% Row 0
\SetRowColor{LightBackground}
strace \textless{}filename\textgreater{} & Starts program and tracing it \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
strace -p \textless{}pid\textgreater{} & Attaches at process-id \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
strace -o log.txt \textless{}filename\textgreater{} & Writes output into a logfile \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
strace -f \textless{}filename\textgreater{} & Also log child processes \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.9908 cm} x{2.9862 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{PWNtools}}  \tn
% Row 0
\SetRowColor{LightBackground}
pwn asm nop & Write NOP opcode \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
pwn asm nop 'mov eax, 1' & Write NOP and MOV opcode \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
pwn asm -f string nop & Outputs in \textbackslash{}x Notation \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
pwn disasm 909090 & Output the disassembly of three NOPs \tn 
% Row Count 7 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.03597 cm} x{1.94103 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{PERL - Basics for exploits}}  \tn
% Row 0
\SetRowColor{LightBackground}
perl -e '\{print "A"x"1024"\}' & Print 1024 times A \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.9954 cm} x{3.9816 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Student Files}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{lessons/} & Assembler files, aimed at teaching x86\_32 basics \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{shellcode/} & Collection of bad shellcodes, students have to improve \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{skeletons/} & Skeleton Code files \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{exploits/} & Exploits shellcode is ran against \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
tools/ & Support tools for the training \tn 
% Row Count 9 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}