Basic Linux Privilege Escalation

linPEAS.sh

metasploit: multi/recon/local_exploit_suggester

find / -perm -4000 -type f -exec ls -la {} 2>/dev/null

cat /etc/issue
cat /etc/*-release
cat /etc/lsb-release      # Debian based
cat /etc/redhat-release   # Redhat base
cat /proc/version
uname -a
uname -mrs
rpm -q kernel
dmesg | grep Linux
ls /boot | grep vmlinuz-

cat /etc/profile
cat /etc/bashrc
cat ~/.bash_profile
cat ~/.bashrc
cat ~/.bash_logout
env
set

cat /etc/fstab

ps aux
ps -ef
top
cat /etc/services

ps aux | grep root
ps -ef | grep root

ls -alh /usr/bin/
ls -alh /sbin/
dpkg -l
rpm -qa
ls -alh /var/cache/apt/archivesO
ls -alh /var/cache/yum/

cat /etc/syslog.conf
cat /etc/chttp.conf
cat /etc/lighttpd.conf
cat /etc/cups/cupsd.conf
cat /etc/inetd.conf
cat /etc/apache2/apache2.conf
cat /etc/my.conf
cat /etc/httpd/conf/httpd.conf
cat /opt/lampp/etc/httpd.conf
ls -aRl /etc/ | awk '$1 ~ /^.*r.*/'

crontab -l
ls -alh /var/spool/cron
ls -al /etc/ | grep cron
ls -al /etc/cron*
cat /etc/cron*
cat /etc/at.allow
cat /etc/at.deny
cat /etc/cron.allow
cat /etc/cron.deny
cat /etc/crontab
cat /etc/anacrontab
cat /var/spool/cron/crontabs/root
ls -al /var/cron.log - check timestamps

/sbin/ifconfig -a
cat /etc/network/interfaces
cat /etc/sysconfig/network
ip a
ip addr
cat /etc/resolv.conf
cat /etc/sysconfig/network
cat /etc/networks
iptables -L
hostname
dnsdomainname

lsof -i
lsof -i :80
grep 80 /etc/services
netstat -ano
netstat -antup
netstat -antpx
netstat -tulpn
chkconfig --list
chkconfig --list | grep 3:on

id
cat /etc/passwd | cut -d: -f1    # List of users
grep -v -E "^#" /etc/passwd | awk -F: '$3 == 0 { print $1}'   # List of super users
awk -F: '($3 == "0") {print}' /etc/passwd   # List of super users
cat /etc/sudoers
sudo -l

cat /etc/passwd
cat /etc/group
cat /etc/shadow
ls -alh /var/mail/
ls -ahlR /root/
ls -ahlR /home/
cat /var/apache2/config.inc
cat /var/lib/mysql/mysql/user.MYD
cat ~/.bash_history
cat ~/.nano_history
cat ~/.atftp_history
cat ~/.mysql_history
cat ~/.php_history
cat ~/.ssh/authorized_keys
cat ~/.ssh/identity.pub
cat ~/.ssh/identity
cat ~/.ssh/id_rsa.pub
cat ~/.ssh/id_rsa
cat ~/.ssh/id_dsa.pub
cat ~/.ssh/id_dsa
cat /etc/ssh/ssh_config
cat /etc/ssh/sshd_config
cat /etc/ssh/ssh_host_dsa_key.pub
cat /etc/ssh/ssh_host_dsa_key
cat /etc/ssh/ssh_host_rsa_key.pub
cat /etc/ssh/ssh_host_rsa_key
cat /etc/ssh/ssh_host_key.pub
cat /etc/ssh/ssh_host_key

cat /etc/fstab
cat /etc/exports
mount
df -h
showmount -e MACHINE_IP

ls -aRl /etc/ | awk '$1 ~ /^.*w.*/' 2>/dev/null     # Anyone
ls -aRl /etc/ | awk '$1 ~ /^..w/' 2>/dev/null       # Owner
ls -aRl /etc/ | awk '$1 ~ /^.....w/' 2>/dev/null    # Group
ls -aRl /etc/ | awk '$1 ~ /w.$/' 2>/dev/null        # Other
find /etc/ -readable -type f 2>/dev/null               # Anyone
find /etc/ -readable -type f -maxdepth 1 2>/dev/null   # Anyone

ls -alh /var/log
ls -alh /var/mail
ls -alh /var/spool
ls -alh /var/spool/lpd

cat /etc/httpd/logs/access_log
cat /etc/httpd/logs/access.log
cat /etc/httpd/logs/error_log
cat /etc/httpd/logs/error.log
cat /var/log/apache2/access_log
cat /var/log/apache2/access.log
cat /var/log/apache2/error_log
cat /var/log/apache2/error.log
cat /var/log/apache/access_log
cat /var/log/apache/access.log
cat /var/log/auth.log
cat /var/log/chttp.log
cat /var/log/cups/error_log
cat /var/log/dpkg.log
cat /var/log/faillog
cat /var/log/httpd/access_log
cat /var/log/httpd/access.log
cat /var/log/httpd/error_log
cat /var/log/httpd/error.log
cat /var/log/lastlog
cat /var/log/lighttpd/access.log
cat /var/log/lighttpd/error.log
cat /var/log/lighttpd/lighttpd.access.log
cat /var/log/lighttpd/lighttpd.error.log
cat /var/log/messages
cat /var/log/secure
cat /var/log/syslog
cat /var/log/wtmp
cat /var/log/xferlog
cat /var/log/yum.log
cat /var/run/utmp
cat /var/webmin/miniserv.log
cat /var/www/logs/access_log
cat /var/www/logs/access.log
ls -alh /var/lib/dhcp3/
ls -alh /var/log/postgresql/
ls -alh /var/log/proftpd/
ls -alh /var/log/samba/

find / -perm -1000 -type d 2>/dev/null   # Sticky bit - Only the owner of the directory or the owner of a file can delete or rename here.
find / -perm -g=s -type f 2>/dev/null    # SGID (chmod 2000) - run as the group, not the user who started it.
find / -perm -u=s -type f 2>/dev/null    # SUID (chmod 4000) - run as the owner, not the user who started it.
find / -perm -g=s -o -perm -u=s -type f 2>/dev/null    # SGID or SUID < full search
for i in $(locate -r "bin$"); do find $i \( -perm -4000 -o -perm -2000 \) -type f 2>/dev/null; done    # Looks in 'common' places: /bin, /sbin < quicker
find / -perm -g=s -o -perm -4000 ! -type l -maxdepth 3 -exec ls -ld {} \; 2>/dev/null   #find starting at root (/), SGID or SUID, not Symbolic links, only 3 folders deep, list with more detail and hide any errors (e.g. permission denied)
find / perm /u=s -user "User name that you are looking for" 2>/dev/null

find / -writable -type f -name "*.py" 2>/dev/null     #find all python file that can be write by us
ls -aRl / | awk '$1 ~ /^.*w.*/' 2>/dev/null     # Anyone
ls -aRl / | awk '$1 ~ /^..w/' 2>/dev/null       # Owner
ls -aRl / | awk '$1 ~ /^.....w/' 2>/dev/null    # Group
ls -aRl / | awk '$1 ~ /w.$/' 2>/dev/null        # Other
find / -readable -type f 2>/dev/null               # Anyone
find / -readable -type f -maxdepth 1 2>/dev/null   # Anyone

ps aux|grep "root"
/usr/bin/journalctl    # Normally not readable by a user

grep -rnw '/' -ie 'pass' --color=always
grep -rnw '/' -ie 'DB_PASS' --color=always
grep -rnw '/' -ie 'DB_PASSWORD' --color=always
grep -rnw '/' -ie 'DB_USER' --color=always

Files modified in the last 5 mins
find / -type f -mmin -5 ! -path "/proc/*" ! -path "/sys/*" ! -path "/run/*" ! -path "/dev/*" ! -path "/var/lib/*" 2>/dev/null
 
Sqlite DB files
find / -name '*.db' -o -name '*.sqlite' -o -name '*.sqlite3' 2>/dev/null
 
All hidden files 
find / -type f -iname ".*" -ls 2>/dev/null
 
Scripts in PATH 
for d in `echo $PATH | tr ":" "\n"`; do find $d -name "*.sh" 2>/dev/null; done
for d in `echo $PATH | tr ":" "\n"`; do find $d -type -f -executable 2>/dev/null; done
 
Backup files 
find /var /etc /bin /sbin /home /usr/local/bin /usr/local/sbin /usr/bin /usr/games /usr/sbin /root