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COMHunter update #15

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COMHunter update #15

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78 changes: 65 additions & 13 deletions COMHunter/Program.cs
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Original file line number Diff line number Diff line change
@@ -1,14 +1,17 @@
using System;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Management;
using System.Runtime;
using System.Reflection;
using System.Runtime.InteropServices;

namespace COMHunter
{
class Program
{
public static string usage = "Usage: COMHunter.exe <-inproc|-localserver>";
public static string usage = "Usage: COMHunter.exe [-inproc | -localserver] [-includesystem]";

public struct COMServer
{
Expand All @@ -17,22 +20,60 @@ public struct COMServer
public string Type;
}

// Trim function is not present on .NET versions < 4.6
public static string TrimEnd(string source, string value)
{
if (!source.EndsWith(value)) {
return source;
}
return source.Remove(source.LastIndexOf(value));
}

static void Main(string[] args)
{
List<COMServer> servers = new List<COMServer>();

if (args.Length == 0)
HashSet<string> exclusionSet = new HashSet<string>();
exclusionSet.Add("ToString");
exclusionSet.Add("GetLifetimeService");
exclusionSet.Add("InitializeLifetimeService");
exclusionSet.Add("CreateObjRef");
exclusionSet.Add("Equals");
exclusionSet.Add("GetHashCode");
exclusionSet.Add("GetType");

bool includeSystem = false;
bool inproc = true;
bool localserver = true;
foreach(string arg in args) {
if (arg.Equals("-includesystem")) {
includeSystem = true;
} else if (arg.Equals("-inproc")) {
localserver = false;
} else if (arg.Equals("-localserver")) {
inproc = false;
} else {
Console.WriteLine(usage);
return;
}
}

if (!inproc && !localserver) {
inproc = localserver = true;
}

if (inproc && localserver)
{
servers = WMICollection("InprocServer32");
servers.AddRange(WMICollection("LocalServer32"));
servers = WMICollection("InprocServer32", includeSystem);
servers.AddRange(WMICollection("LocalServer32", includeSystem));
}
else if(args[0] == "-inproc")
else if (inproc)
{
servers = WMICollection("InprocServer32");
servers = WMICollection("InprocServer32", includeSystem);
}
else if (args[0] == "-localserver")
else if (localserver)
{
servers = WMICollection("LocalServer32");
servers = WMICollection("LocalServer32", includeSystem);
}
else
{
Expand All @@ -43,11 +84,19 @@ static void Main(string[] args)
foreach (COMServer server in servers)
{
Console.WriteLine("{0} {1} ({2})", server.CLSID, server.ServerPath, server.Type);
Type t = Type.GetTypeFromCLSID(new Guid(server.CLSID));
MethodInfo[] methods = t.GetMethods(BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public);
foreach (MethodInfo m in methods) {
if(exclusionSet.Contains(m.Name)) {
continue;
}
Console.WriteLine("\t- " + m.Name);
}
}
return;
}

static List<COMServer> WMICollection(string type)
static List<COMServer> WMICollection(string type, bool includeSystem)
{
List<COMServer> comServers = new List<COMServer>();
try
Expand All @@ -57,13 +106,16 @@ static List<COMServer> WMICollection(string type)
{
// Collect InProcServer32 values
string svrObj = Convert.ToString(queryObj[type]);
string svr = Environment.ExpandEnvironmentVariables(svrObj).Trim('"');
string svr = TrimEnd(Environment.ExpandEnvironmentVariables(svrObj), "\"");

if (!string.IsNullOrEmpty(svr)
&& svr.ToLower().StartsWith(@"c:\") // Filter out things like combase.dll and ole32.dll
&& !svr.ToLower().Contains(@"c:\windows\") // Ignore OS components
&& svr.ToLower().StartsWith(@"c:\")
&& File.Exists(svr)) // Make sure the file exists
{
//Ignore OS components, if flag isn't set
if(!includeSystem && svr.ToLower().Contains(@"c:\windows\")) {
continue;
}
comServers.Add(new COMServer
{
CLSID = queryObj["ComponentId"].ToString(),
Expand Down