RIP a password protected archive with John the Ripper post
Install KALI
First, intall a kali headless VM with vagrant.
Grant large CPUs and RAM resources to the VM. For instance, in Vagrantfile
:
# Create a forwarded port
config.vm.network "forwarded_port", guest: 80, host: 8080
# Create a private network. In VirtualBox, this is a Host-Only network
config.vm.network "private_network", ip: "192.168.33.101"
# VirtualBox specific settings
config.vm.provider "virtualbox" do |vb|
# Hide the VirtualBox GUI when booting the machine
vb.gui = false
# Customize the amount of memory on the VM:
vb.memory = "8192"
vb.cpus= "5"
end
# Provision the machine with a shell script
config.vm.provision "shell", inline: <<-SHELL
apt-get update
apt-get install -y crowbar
SHELL
end
Generate a test archive
echo "foo bar" > file.txt
zip -P pass archive.zip file.txt
Thus, our archive is protected with the password: pass
Test password protection:
unzip archive.zip
Archive: archive.zip
[archive.zip] file.txt password:
RIP archive.zip
Get password hash with zip2john
zip2john archive.zip > hash.txt
Prints :
ver 1.0 efh 5455 efh 7875 archive.zip/file.txt PKZIP Encr: 2b chk, TS_chk, cmplen=20, decmplen=8, crc=13DDB427
RIP hash
john hash.txt
Prints:
Using default input encoding: UTF-8
Loaded 1 password hash (PKZIP [32/64])
Will run 2 OpenMP threads
Proceeding with single, rules:Wordlist
Press 'q' or Ctrl-C to abort, almost any other key for status
Warning: Only 4 candidates buffered for the current salt, minimum 8
needed for performance.
Warning: Only 5 candidates buffered for the current salt, minimum 8
needed for performance.
Warning: Only 6 candidates buffered for the current salt, minimum 8
needed for performance.
Warning: Only 4 candidates buffered for the current salt, minimum 8
needed for performance.
Almost done: Processing the remaining buffered candidate passwords, if any
Proceeding with wordlist:/usr/share/john/password.lst, rules:Wordlist
pass (archive.zip/file.txt)
1g 0:00:00:00 DONE 2/3 (2019-05-06 09:53) 50.00g/s 2109Kp/s 2109Kc/s 2109KC/s 123456..Peter
Use the "--show" option to display all of the cracked passwords reliably
Session completed
And archive password is...
pass (archive.zip/file.txt)
Tips
If you run john
again, you will get:
john hash.txt
Using default input encoding: UTF-8
Loaded 1 password hash (PKZIP [32/64])
No password hashes left to crack (see FAQ)
This means that the password has already been ripped, to print password check .john/john.pot
file or use --show
option:
john hash.txt --show
archive.zip/file.txt:pass:file.txt:archive.zip::archive.zip
1 password hash cracked, 0 left