FakeNet - Windows Network Simulation Tool for Malware Analysis


FakeNet is a tool that aids in the dynamic analysis of malicious software. The tool simulates a network so that malware interacting with a remote host continues to run allowing the analyst to observe the malware's network activity from within a safe environment.

Features:

  • Supports DNS, HTTP, and SSL
  • HTTP server always serves a file and tries to serve a meaningful file; if the malware request a .jpg then a properly formatted .jpg is served, etc.  The files being served are user configurable.
  • Ability to redirect all traffic to the localhost, including traffic destined for a hard-coded IP address.
  • Python extensions, including a sample extension that implements SMTP and SMTP over SSL.
  • Built-in ability to create a capture file (.pcap) for packets on localhost.
  • Dummy listener that will listen for traffic on any port, auto-detect and decrypt SSL traffic and display the content to the console.

FakeNet uses a variety of Windows and third-party libraries. It uses a custom HTTP and DNS server to respond to those request. It uses OpenSSL to wrap any connection with SSL. It uses a Winsock Layered Service Provider (LSP) to redirect traffic to the localhost and to listen for traffic on new ports.  It uses python 2.7 for the python extensions.  And, it creates the .pcap file by reconstructing a packet header based on the traffic from send/recv calls.



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