public NamedPipeSniffer(ChromeMonitor chromeMonitor, string wiresharkPipeName, string nameFilter = "", bool recordOnlyNewMojoPipes = false)
{
this.wiresharkSender = new WiresharkSender(wiresharkPipeName, 1);
this.namedPipeFiles = new Dictionary <string, NamedPipeInfo>();
this.destoryedNamedPipes = new List <string>();
this.chromeMonitor = chromeMonitor;
this.recordingOnlyNewMojoPipes = recordOnlyNewMojoPipes;
this.pipeNameFilter = nameFilter;
this.lastDropTime = DateTime.Now;
this.numPacketsProcessed = 0;
}
/// <summary>
/// Downloads and analyses the legacy IPC files from the chromium git repository,
/// in case a cache does not exist
/// </summary>
/// <param name="force"></param>
/// <returns>The cached interfaces chromium verison</returns>
public static string UpdateInterfacesInfoIfNeeded(string chromeVersion, bool force = false)
{
if (!force)
{
Console.WriteLine("[+] Checking legacy IPC interfaces information");
if (File.Exists(CACHE_FILENAME))
{
dynamic interfaceInfo = JsonConvert.DeserializeObject(File.ReadAllText(CACHE_FILENAME));
string cachedVersion = interfaceInfo["metadata"]["version"];
return(cachedVersion);
}
}
string commit = ChromeMonitor.GetCommitForVersion(chromeVersion);
Console.WriteLine("[+] Matching commit is " + commit);
DownloadAndAnalyzeLegacyIpcFiles(messageFiles, commit, chromeVersion);
return(chromeVersion);
}
static void Main(string[] args)
{
Console.WriteLine();
Console.WriteLine("Chrome IPC Sniffer v" + Assembly.GetExecutingAssembly().GetName().Version.ToString());
Console.WriteLine();
//
// Parse the arguments
//
bool onlyNewPipes = false;
bool forceFetchInterfacesInfo = false;
bool forceExtractMethodNames = false;
bool onlyMojo = false;
foreach (string argument in args)
{
if (argument.Contains("--update-interfaces-info"))
{
forceFetchInterfacesInfo = true; forceExtractMethodNames = true;
}
else if (argument.Contains("--only-new-mojo-pipes"))
{
onlyNewPipes = true;
}
else if (argument.Contains("--extract-method-names"))
{
forceExtractMethodNames = true;
}
else if (argument.Contains("--only-mojo"))
{
onlyMojo = true;
}
else if (argument.Contains("-h") || argument.Contains("--help") || argument.Contains("/?"))
{
ShowUsage(); return;
}
else
{
Console.WriteLine("[!] Unrecognized argument '{0}'", argument);
return;
}
}
Console.WriteLine("Type -h to get usage help and extended options");
Console.WriteLine();
Console.WriteLine("[+] Starting up");
//
// Prepare
//
ChromeMonitor chromeMonitor = new ChromeMonitor();
string mojoVersion = MojoInterfacesFetcher.UpdateInterfacesInfoIfNeeded(chromeMonitor.ChromeVersion, force: forceFetchInterfacesInfo);
string legacyIpcversion = LegacyIpcInterfacesFetcher.UpdateInterfacesInfoIfNeeded(chromeMonitor.ChromeVersion, force: forceFetchInterfacesInfo);
if (mojoVersion != chromeMonitor.ChromeVersion || legacyIpcversion != chromeMonitor.ChromeVersion)
{
Console.WriteLine("[!] Cached info is for " + mojoVersion + ", you may run --update-interfaces-info");
}
MojoMethodHashesExtractor.ExtractMethodNames(chromeMonitor.DLLPath, force: forceExtractMethodNames);
bool success = UpdateWiresharkConfiguration();
if (!success)
{
return;
}
Console.WriteLine("[+] Enumerating existing chrome pipes");
HandlesUtility.EnumerateExistingHandles(ChromeMonitor.GetRunningChromeProcesses());
//
// Start sniffing
//
string outputPipeName = "chromeipc";
string outputPipePath = @"\\.\pipe\" + outputPipeName;
Console.WriteLine("[+] Starting sniffing of chrome named pipe to " + outputPipePath + ".");
NamedPipeSniffer pipeMonitor = new NamedPipeSniffer(chromeMonitor, outputPipeName, onlyMojo ? "mojo" : "", onlyNewPipes);
bool isMonitoring = pipeMonitor.Start();
if (isMonitoring)
{
if (Process.GetProcessesByName("Wireshark").Length == 0)
{
Console.WriteLine("[+] Opening Wirehark");
Process.Start(@"C:\Program Files\Wireshark\Wireshark.exe", "-k -i " + outputPipePath);
}
Console.WriteLine("[+] Capturing packets...");
}
//
// Set up clean up routines
//
Console.CancelKeyPress += delegate
{
Thread.CurrentThread.IsBackground = false;
pipeMonitor.Stop();
};
}
public void OnReadWritePacketReceived(dm_NotifyHdr notificationHeader, dm_ReadWriteNotifyParams writeParams, byte[] data, bool isWriting)
{
UInt64 fileObject = writeParams.fileIdentifier;
UInt32 processId = notificationHeader.processId;
if (!chromeMonitor.IsChromeProcess(processId))
{
return;
}
// Find out on which pipe this packet was sent
NamedPipeInfo pipe = DeterminePipeFromPacket(notificationHeader, writeParams);
string pipeName = pipe != null ? pipe.PipeFileName : "<Unknown " + fileObject.ToString("X") + ">";
if (pipe != null)
{
// Update this pipe's information
namedPipeFiles[pipeName].AddProcessIfNeeded(processId);
namedPipeFiles[pipeName].AddFileObjectIfNeeded(fileObject);
}
if (!pipeName.Contains(this.pipeNameFilter))
{
return;
}
//
// Find out what is the destination process of this packet
//
UInt32 destinationPID = 0;
if (pipe != null)
{
if (pipe.InvolvedProcesses.Count < 2 && !destoryedNamedPipes.Contains(pipe.PipeFileName))
{
//
// try to find the destination process using Windows handle query
//
List <int> legalPIDs = ChromeMonitor.GetRunningChromeProcesses().Select(process => process.Id).ToList();
string fullPipePath = @"\Device\NamedPipe" + pipe.PipeFileName;
namedPipeFiles[pipeName].InvolvedProcesses = HandlesUtility.GetProcessesUsingFile(fullPipePath, legalPIDs);
if (namedPipeFiles[pipeName].InvolvedProcesses.Count < 2)
{
// TODO: because we are doing heavy caching on the handle information,
// it happens sometimes that we reach here but the pipe actually is in fact valid.
//Console.WriteLine("[-] Could not find destination PID for " + pipeName);
destoryedNamedPipes.Add(pipe.PipeFileName);
}
}
if (pipe.InvolvedProcesses.Count >= 2)
{
List <uint> involvedProcesses = pipe.InvolvedProcesses.ToList();
involvedProcesses.Remove(notificationHeader.processId);
destinationPID = involvedProcesses.Last();
}
}
if (!isWriting)
{
return;
}
if (data.Length == 0)
{
return;
}
//
// Send it off
//
this.numPacketsProcessed++;
byte[] wiresharkPacket = GenerateWiresharkPacket(notificationHeader, writeParams, pipeName, destinationPID, data);
wiresharkSender.SendToWiresharkAsEthernet(wiresharkPacket, 0);
}