Bypassing Anti-Virus Software with Metasploit 3.2
23 Nov 2008 08:38 AM / Filed in: I.T.
4 days ago, The Metasploit project finally released version 3.2 of the Metasploit exploitation framework. Besides the fact that it is the very first version to be released under a BSD license (which should make license-wary jerks rejoice), it has many interesting new features.

One of these features is the ability to create executable files for the Windows platform on the fly from payloads such as the highly efficient Meterpreter. 2 days before the official release, HD Moore wrote a wiki page explaining how to automate Meterpreter sessions for client-side exploits (post to the mailing list and thread that followed). Using the Shikata Ga Nai polymorphic encoder (for the curious, Shikata Ga Nai is japanese for it can’t be helped, there is even a Wikipedia page for it), it is possible to create a unique binary executable which anti-virus software will have a hard time spotting.
John Strand posted a video comparing how executables created by Metasploit 3.1 and 3.2 fare against AV software by uploading these executables on Virus Total. The results are quite impressive.
If you want more details about Shikata Ga Nai, please read Context-keyed Payload Encoding, an article written by l)ruid (who is a Metasploit contributor) on Uninformed.org.

One of these features is the ability to create executable files for the Windows platform on the fly from payloads such as the highly efficient Meterpreter. 2 days before the official release, HD Moore wrote a wiki page explaining how to automate Meterpreter sessions for client-side exploits (post to the mailing list and thread that followed). Using the Shikata Ga Nai polymorphic encoder (for the curious, Shikata Ga Nai is japanese for it can’t be helped, there is even a Wikipedia page for it), it is possible to create a unique binary executable which anti-virus software will have a hard time spotting.
John Strand posted a video comparing how executables created by Metasploit 3.1 and 3.2 fare against AV software by uploading these executables on Virus Total. The results are quite impressive.
If you want more details about Shikata Ga Nai, please read Context-keyed Payload Encoding, an article written by l)ruid (who is a Metasploit contributor) on Uninformed.org.
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