BruteShark is a Network Forensic Analysis Tool (NFAT) that performs deep processing and inspection of network traffic (mainly PCAP files, but it also capable of directly live capturing from a network interface). It includes: password extracting, building a network map, reconstruct TCP sessions, extract hashes of encrypted passwords and even convert them to a Hashcat format in order to perform an offline Brute Force attack.

The main goal of the project is to provide solution to security researchers and network administrators with the task of network traffic analysis while they try to identify weaknesses that can be used by a potential attacker to gain access to critical points on the network.

Two BruteShark versions are available, A GUI based application (Windows) and a Command Line Interface tool (Windows and Linux).
The various projects in the solution can also be used independently as infrastructure for analyzing network traffic on Linux or Windows machines. For further details see the Architecture section.

The project was developed in my spare time to address two main passions of mine: software architecture and analyzing network data.

I love to get feedbacks from BruteShark users, your opinion is important to me! Feel free to contact me on contact.oded.shimon@gmail.com or create new issue.

Please ⭐️ this repository if this project helped you! Also, if you’re feeling generous, you can buy me a coffe 

What it can do

• Extracting and encoding usernames and passwords (HTTP, FTP, Telnet, IMAP, SMTP…)
• Extract authentication hashes and crack them using Hashcat (Kerberos, NTLM, CRAM-MD5, HTTP-Digest…)
• Build visual network diagram (Network nodes, Open Ports, Domain Users)
• Extract DNS queries
• Reconstruct all TCP & UDP Sessions
• File Carving
• Extract Voip calls (SIP, RTP)

Download

Windows

• Prerequisites:
  • Npcap driver (Wireshark installs one of this by default)
  • .NET Core Runtime (Note that you have to install the proper runtime regard to your needs, that means .NET Core Desktop Runtime for BruteSharkDesktop and .NET Core Runtime for BruteSharkCli).
• For desktop version download BruteSharkDesktop Windows Installer (64 Bit).
• For CLI version download BruteSharkCli Windows 10 Executable.

Linux

• Prerequisites: libpcap driver
• Download BruteSharkCli and just run it

wget https://github.com/odedshimon/BruteShark/releases/latest/download/BruteSharkCli
./BruteSharkCli

Examples

Videos

Building a network map
https://user-images.githubusercontent.com/18364847/131922221-5714f351-85f7-4490-bec9-8da4339b66b3.mp4
BruteSharkCli Usage Example – Extract Multiple Passwords and Hashes (also available at youtube)
https://user-images.githubusercontent.com/18364847/131924013-8b2aa18b-0941-456e-a09d-799902554166.mp4

Hashes Extracting

Usage

In general, it is recommended load, run and explore the results.
Example PCAP files containing scenarios that demonstrates all BruteShark capabilities can be downloaded from here.
Note that analyzing network traffic is an operation that consumes time and resources, so it is recommended to select only the required modules when large files are loaded.
Particular attention should be paid to the “Build TCP Sessions” / “Build UDP Sessions” options.

BruteSharkDesktop

The GUI is pretty self-explanatory, just load the wanted files, configure the wanted modules and press the run button.

BruteSharkCli

BruteSharkCli is the CLI version of BruteShark for Linux & Windows users. It has all the features of BruteSharkDesktop and designed to operate from a shell. As a classic CLI tool it works by getting all the relevant parameters for the processing and then printing the results to stdout or files.

Print the help menu:

BruteSharkCli –help

Get credentials from all files in a directory (passwords and hashes will be printed to stdout):

BruteSharkCli -m Credentials -d “C:\Users\King\Desktop\Pcap Files”

Get credentials from all files in a directory and also export extracted hashes (if found) to Hashcat input files.

BruteSharkCli -m Credentials -d C:\Users\King\Desktop\Pcap_Examples -o C:\Users\King\Desktop\Results

Run multiple modules on all files in a directory and also export all the results.

BruteSharkCli -m Credentials,NetworkMap,FileExtracting -d C:\Users\King\Desktop\Pcap_Examples -o C:\Users\King\Desktop\Results

Sniff an interface named “Wi-Fi”, run multiple modules and also export all the results to a directory (the results will be exported only when stopping the sniffer by hitting CTRL + C).

BruteSharkCli -l Wi-Fi -m Credentials,NetworkMap,FileExtracting,DNS -o C:\Users\King\Desktop\Test Export

Modules

BruteShark is a modular tool, designed for expansion.

Credentials Module

This module is responsible for extracting and encoding usernames and passwords as well as authentication hashes. In fact this module is responsible for updating two display tables, passwords table and hashes table. While usernames and passwords are straight forward to use, hashes most often used in more complex attacks like pass-the-hash or by brute-forcing them to get the password. BruteShark is integrated with Hashcat so all the hashes extracted can be converted to a Hashcat input file.

Protocol	Hash Type	Hascat Mode (-m)
HTTP	HTTP-Digest	11400
SMTP\IMAP	CRAM-MD5	16400
NTLM (e.g. SMB)	NTLMv1	5500
NTLM (e.g. SMB)	NTLMv2	5600
Kerberos	AS-REQ etype 23	7500
Kerberos	AS-REP etype 23	18200
Kerberos	TGS-REP etype 23	13100
Kerberos (AES128)	TGS-REP etype 17	19600
Kerberos (AES256)	TGS-REP etype 18	19700

Network Map Module

This module is responsible for building the network map by identifying components in the network and the connections between them. The network map can be exported to two JSON files, one file contains all the connections in the network and one contains all the endpoints and the related information about them (like open ports, DNS mappings etc.). Those files can be used for analysis with external tools such as Neo4j.

This module tries to extract files from UDP / TCP sessions (Therefore, note that in order for this module to be effective, the “Build TCP Sessions” / “Build UDP Sessions” should be turn on). Currently this module supports classic forensics techniques of file carving by “Header-Footer” algorithm which is effective for files with known file header and footer like JPG, PNG, PDF.

Voip Calls Module

This module extracts Voip calls from SIP & RTP protocols. The extracted calls can be exported as raw audio files and can be played using a proper audio player (like Audacity)

Architecture

All BruteShark projects are implemented using .Net Core and .Net Standard for modern and cross platform support. The solution is designed with three layer architecture, including a one or more projects at each layer – DAL, BLL and PL. The separation between layers is created by the fact that each project refers only its own objects.

PcapProcessor (DAL)

As the Data Access Layer, this project is responsible for reading raw PCAP files using appropriate drivers (WinPcap, libpcap) and the amazing wrapper library SharpPcap by Chris Morgan. Can analyze a list of files at once, and provides additional features like reconstruction of all TCP Sessions (using the awesome project TcpRecon).

PcapAnalyzer (BLL)

The Business Logic Layer, responsible for analyzing network information (packet, TCP Session etc.), implements a pluggable mechanism. Each plugin is basically a class that implements the interface IModule. All plugins are loaded using reflection:

private void _initilyzeModulesList()
{
// Create an instance for any available modules by looking for every class that
// implements IModule.
this._modules = AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(s => s.GetTypes())
.Where(p => typeof(IModule).IsAssignableFrom(p) && !p.IsInterface)
.Select(t => (IModule)Activator.CreateInstance(t))
.ToList();
// Register to each module event.
foreach(var m in _modules)
{
m.ParsedItemDetected += (s, e) => this.ParsedItemDetected(s, e);
}

BruteSharkDesktop (PL)

Desktop application for Windows based on WinForms. Uses a cross-cutting project by the meaning it referrers both the DAL and BLL layers. This is done by composing each of the layers, register to their events, when event is triggered, cast the event object to the next layer equivalent object, and send it to next layer.

public MainForm()
{
InitializeComponent();
_files = new HashSet();
// Create the DAL and BLL objects.
_processor = new PcapProcessor.Processor();
_analyzer = new PcapAnalyzer.Analyzer();
_processor.BuildTcpSessions = true;
// Create the user controls.
_networkMapUserControl = new NetworkMapUserControl();
_networkMapUserControl.Dock = DockStyle.Fill;
_sessionsExplorerUserControl = new SessionsExplorerUserControl();
_sessionsExplorerUserControl.Dock = DockStyle.Fill;
_hashesUserControl = new HashesUserControl();
_hashesUserControl.Dock = DockStyle.Fill;
_passwordsUserControl = new GenericTableUserControl();
_passwordsUserControl.Dock = DockStyle.Fill;
// Contract the events.
_processor.TcpPacketArived += (s, e) => _analyzer.Analyze(Casting.CastProcessorTcpPacketToAnalyzerTcpPacket(e.Packet));
_processor.TcpSessionArived += (s, e) => _analyzer.Analyze(Casting.CastProcessorTcpSessionToAnalyzerTcpSession(e.TcpSession));
_processor.FileProcessingStarted += (s, e) => SwitchToMainThreadContext(() => OnFileProcessStart(s, e));
_processor.FileProcessingEnded += (s, e) => SwitchToMainThreadContext(() => OnFileProcessEnd(s, e));
_processor.ProcessingPrecentsChanged += (s, e) => SwitchToMainThreadContext(() => OnProcessingPrecentsChanged(s, e));
_analyzer.ParsedItemDetected += (s, e) => SwitchToMainThreadContext(() => OnParsedItemDetected(s, e));
_processor.TcpSessionArived += (s, e) => SwitchToMainThreadContext(() => OnSessionArived(Casting.CastProcessorTcpSessionToBruteSharkDesktopTcpSession(e.TcpSession)));
_processor.ProcessingFinished += (s, e) => SwitchToMainThreadContext(() => OnProcessingFinished(s, e));
InitilizeFilesIconsList();
this.modulesTreeView.ExpandAll();
}