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command.c
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command.c
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#define WIN32_LEAN_AND_MEAN
#define WIN32_NO_STATUS
#include <windows.h>
#include <winternl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <tlhelp32.h>
#include <psapi.h>
#include <assert.h>
#include <objbase.h>
#include <sddl.h>
#include <msctf.h>
#include <shlwapi.h>
#include <string.h>
#include <shellapi.h>
#undef WIN32_NO_STATUS
#include <ntstatus.h>
#include "ntdll.h"
#include "ntalpctyp.h"
#include "ntalpc.h"
#include "wineditline/src/editline/readline.h"
#include "ctfinternal.h"
#include "ctftool.h"
#include "marshal.h"
#include "util.h"
#include "commanddoc.h"
#include "messages.h"
#include "winutil.h"
#include "command.h"
#pragma warning(disable: 4090 6387 28159 28278)
UINT64 DefaultThread;
UINT64 DefaultStub;
UINT64 RepeatDelay;
HANDLE PortHandle;
HWND MessageWindow;
UINT64 LeakedStackPointer;
UINT64 LastModuleBase;
UINT64 LastSymbolOffset;
ULONG NumStubs;
STUB_RECORD StubRecords[MAX_STUBS];
ULONG CountMarshalParams;
ULONGLONG LastCommandResult;
ULONGLONG LastRegistryValue;
ULONG CurrentMarshalParam;
PCTF_MARSHAL_PARAM MarshalParams;
UINT64 ClientThreadId;
UINT64 ClientFlags;
ULONG NonInteractive;
UINT64 LastGadget;
UINT64 LastSectionResult;
ULONGLONG UserRegisters[6];
COMMAND_HANDLER CommandHandlers[] = {
{ "help", 0, HelpDoc, "List available commands.", HelpHandler },
{ "exit", 0, ExitDoc, "Exit the shell.", ExitHandler },
{ "quit", 0, NULL, NULL, ExitHandler },
{ "q", 0, NULL, NULL, ExitHandler },
{ "connect", 0, ConnectDoc, "Connect to CTF ALPC Port.", ConnectHandler },
{ "info", 0, InfoDoc, "Query server informaiton.", InfoHandler },
{ "scan", 0, ScanDoc, "Enumerate connected clients.", ScanHandler },
{ "callstub", 3, CallStubDoc, "Ask a client to invoke a function.", CallStubHandler },
{ "createstub", 3, CreateStubDoc, "Ask a client to instantiate CLSID.", CreateStubHandler },
{ "hijack", 2, HijackDoc, "Attempt to hijack an ALPC server path.", HijackHandler },
{ "sendinput", 2, NULL, "Send keystrokes to thread.", NULL },
{ "setarg", 1, SetArgDoc, "Marshal a parameter.", SetArgHandler },
{ "getarg", 1, GetArgDoc, "Unmarshal a parameter.", GetArgHandler },
{ "wait", 1, WaitDoc, "Wait for a process and set it as the default thread.", WaitHandler },
{ "thread", 0, ThreadDoc, "Set the default thread.", ThreadHandler },
{ "sleep", 1, SleepDoc, "Sleep for specified milliseconds.", SleepHandler },
{ "forget", 0, ForgetDoc, "Forget all known stubs.", ForgetHandler },
{ "stack", 0, StackDoc, "Print the last leaked stack ptr.", StackHandler },
{ "marshal", 2, MarshalDoc, "Send command with marshalled parameters.", MarshalHandler },
{ "proxy", 3, CallStubDoc, "Send command with proxy parameters.", CallStubHandler },
{ "call", 2, CallDoc, "Send command without appended data.", CallHandler },
{ "window", 0, WindowDoc, "Create and register a message window.", WindowHandler },
{ "patch", 4, PatchDoc, "Patch a marshalled parameter.", PatchHandler },
{ "module", 1, ModuleDoc, "Print the base address of a module.", ModuleHandler },
{ "module64", 1, ModuleDoc, "Print the base address of a 64bit module.", ModuleHandler64 },
{ "editarg", 1, EditArgDoc, "Change the type of a marshalled parameter.", EditArgHandler },
{ "symbol", 1, SymbolDoc, "Lookup a symbol offset from ImageBase.", SymbolHandler },
{ "set", 0, SetDoc, "Change or dump various ctftool parameters.", SetHandler },
{ "add", 2, NULL, NULL, SetHandler },
{ "sub", 2, NULL, NULL, SetHandler },
{ "neg", 2, NULL, NULL, SetHandler },
{ "shl", 2, NULL, NULL, SetHandler },
{ "shr", 2, NULL, NULL, SetHandler },
{ "and", 2, NULL, NULL, SetHandler },
{ "or", 2, NULL, NULL, SetHandler },
{ "xor", 2, NULL, NULL, SetHandler },
{ "not", 2, NULL, NULL, SetHandler },
{ "eq", 2, NULL, NULL, SetHandler },
{ "show", 0, ShowDoc, "Show the value of special variables you can use.", ShowHandler },
{ "lock", 0, LockDoc, "Lock the workstation, switch to Winlogon desktop.", LockHandler },
{ "repeat", 2, RepeatDoc, "Repeat a command multiple times.", RepeatHandler },
{ "run", 1, RunDoc, "Run a command.", RunHandler },
{ "script", 1, ScriptDoc, "Source a script file.", ScriptHandler },
{ "print", 0, NULL, "Print a string.", PrintHandler },
{ "echo", 1, NULL, NULL, PrintHandler },
{ "consent", 0, ConsentDoc, "Invoke the UAC consent dialog.", ConsentHandler },
{ "reg", 3, RegDoc, "Lookup a DWORD in the registry.", RegHandler },
{ "gadget", 2, GadgetDoc, "Find the offset of a pattern in a file.", GadgetHandler },
{ "section", 3, SectionDoc, "Lookup property of PE section.", SectionHandler },
};
int CompareFirst(PCHAR a, PCHAR *b)
{
return strcmpi(a, *b);
}
ULONGLONG DecodeIntegerParameter(PCHAR Value) {
ULONGLONG Result;
PCHAR ParseEnd;
BOOL PrintHelp;
SPECIAL_VARIABLE Variables[] = {
{ "thread", "The current default thread.", DefaultThread },
{ "stubid", "The last created stubid.", DefaultStub },
{ "tid", "The ctftool main thread id.", GetCurrentThreadId() },
{ "pid", "The ctftool process id.", GetCurrentProcessId() },
{ "sid", "The ctftool session id.", NtCurrentTeb()->ProcessEnvironmentBlock->SessionId },
{ "symbol", "The result of the last symbol lookup.", LastSymbolOffset },
{ "module", "The result of the last module lookup.", LastModuleBase },
{ "focusthread", "Owner of foreground window.", GetFocusThread() },
{ "hkl", "The current keyboard layout", (DWORD)(GetKeyboardLayout(GetCurrentThreadId())) & 0xffff },
{ "r0", "User defined register.", UserRegisters[0] },
{ "r1", "User defined register.", UserRegisters[1] },
{ "r2", "User defined register.", UserRegisters[2] },
{ "r3", "User defined register.", UserRegisters[3] },
{ "r4", "User defined register.", UserRegisters[4] },
{ "r5", "User defined register.", UserRegisters[5] },
{ "rc", "Return code of last run command.", LastCommandResult },
{ "regval", "The last value queried from the registry.", LastRegistryValue },
{ "gadget", "Result of the last gadget found.", LastGadget },
{ "secval", "Result of the last section property query.", LastSectionResult }
};
// Check if the caller is requesting help.
PrintHelp = strcmp(Value, "help") == 0;
// Check if this is a "special" value
for (ULONG i = 0; i < _countof(Variables); i++) {
if (strcmp(Value, "help") == 0) {
LogMessage(stdout, "%-20s: %s", Variables[i].Name, Variables[i].Description);
}
if (strcmp(Value, Variables[i].Name) == 0) {
return Variables[i].Value;
}
}
// Not a special value, try to use strtoull().
Result = strtoull(Value, &ParseEnd, 0);
// If that worked, return result.
if (*ParseEnd == '\0' || PrintHelp)
return Result;
// Failed, just use zero and print a warning.
LogMessage(stderr, "Did not recognize %s as variable or integer, assuming zero.", Value);
return Result;
};
ULONG ScriptHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
FILE *ScriptFile;
PCHAR OriginalCommand;
HIST_ENTRY *Hist;
CHAR LineBuf[8192];
ScriptFile = fopen(*Parameters, "r");
Hist = history_get(history_length() - 1);
OriginalCommand = strdup(Hist->line);
if (ScriptFile) {
NonInteractive++;
while (fgets(LineBuf, sizeof LineBuf, ScriptFile)) {
// Save this to the history so commands can access it.
Hist = replace_history_entry(history_length() - 1, LineBuf, 0);
// Exit command in a script just exits the script.
if (DispatchCommand(LineBuf) == 0)
break;
}
} else {
LogMessage(stderr, "failed to open file %s", *Parameters);
}
NonInteractive--;
// Restore real history entry.
replace_history_entry(history_length() - 1, OriginalCommand, 0);
free(OriginalCommand);
return 1;
}
PCHAR GetOrigCommandLine(BOOL SkipCommand, ULONG SkipParameters)
{
HIST_ENTRY *Hist = history_get(history_length() - 1);
PCHAR CommandLine;
// This is a hack, I just pull the command out of history.
assert(Hist != NULL);
assert(Hist->line);
CommandLine = Hist->line;
// Skip past any leading whitespace.
CommandLine += strspn(CommandLine, " \t\n");
if (SkipCommand) {
CommandLine += strcspn(CommandLine, " \t\n");
CommandLine += strspn(CommandLine, " \t\n");
}
for (ULONG i = 0; i < SkipParameters; i++) {
CommandLine += strcspn(CommandLine, " \t\n");
CommandLine += strspn(CommandLine, " \t\n");
}
return CommandLine;
}
ULONG RunHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
STARTUPINFO StartupInfo = { sizeof StartupInfo };
PROCESS_INFORMATION ProcessInfo;
PCHAR CommandLine = GetOrigCommandLine(TRUE, 0);
PVOID OldValue;
DWORD ReturnCode;
// Disable Redirection so we get the real files.
if (Wow64DisableWow64FsRedirection(&OldValue) == false) {
LogMessage(stderr, "Could not disable redirection.");
}
if (CreateProcess(NULL, CommandLine, NULL, NULL, TRUE, 0, NULL, NULL, &StartupInfo, &ProcessInfo)) {
WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcessInfo.hProcess, &ReturnCode);
CloseHandle(ProcessInfo.hProcess);
CloseHandle(ProcessInfo.hThread);
// Make result available as a variable.
LastCommandResult = ReturnCode;
} else {
LogMessage(stderr, "Failed to create process %s.", CommandLine);
}
// Restore Redirection.
Wow64RevertWow64FsRedirection(OldValue);
return 1;
}
ULONG RepeatHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
HIST_ENTRY *Hist = history_get(history_length() - 1);
ULONG Count = DecodeIntegerParameter(*Parameters);
PCHAR CommandLine = GetOrigCommandLine(TRUE, 1);
for (ULONG i = 0; i < Count; i++) {
ULONG Result = DispatchCommand(CommandLine);
if (Result == 0) {
return Result;
}
// Customizable delay with the set command for debugging.
Sleep(RepeatDelay);
}
return 1;
}
ULONG LockHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
INPUT kHotKeyInput[] = {
{ INPUT_KEYBOARD, .ki = { VK_ESCAPE, .dwFlags = 0 }},
{ INPUT_KEYBOARD, .ki = { VK_ESCAPE, .dwFlags = KEYEVENTF_KEYUP }},
};
LockWorkStation();
// Wait a second for the UI to draw.
Sleep(2000);
// Hit `Esc` so that the login screen gets drawn.
SendInput(_countof(kHotKeyInput), kHotKeyInput, sizeof(INPUT));
return 1;
}
ULONG PrintHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
if (ParamCount && NonInteractive) {
fprintf(stdout, "%s", GetOrigCommandLine(TRUE, 0));
} else if (NonInteractive) {
fprintf(stdout, "\n");
} else {
LogMessage(stdout, "%s", GetOrigCommandLine(TRUE, 0));
}
return 1;
}
ULONG ShowHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
if (ParamCount) {
LogMessage(stdout, "%#llx", DecodeIntegerParameter(*Parameters));
} else {
DecodeIntegerParameter("help");
}
return 1;
}
ULONG SetHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
static const struct {
PUINT64 Value;
PCHAR Name;
PCHAR Description;
} TunableSettings[] = {
{ &DefaultThread, "default-dst-thread", "Destination threadid for commands." },
{ &ClientThreadId, "default-src-thread", "Source threadid for commands." },
{ &DefaultStub, "default-stub", "Default stubid for stub calls." },
{ &ClientFlags, "client-flags", "The client flags passed on connect." },
{ &ProxyExtra1, "proxy-extra-1", "Padding for proxy structure." },
{ &ProxyExtra2, "proxy-extra-2", "Padding for proxy structure." },
{ &ProxyExtra3, "proxy-extra-3", "Padding for proxy structure." },
{ &UserRegisters[0], "r0", "User register." },
{ &UserRegisters[1], "r1", "User register." },
{ &UserRegisters[2], "r2", "User register." },
{ &UserRegisters[3], "r3", "User register." },
{ &UserRegisters[4], "r4", "User register." },
{ &UserRegisters[5], "r5", "User register." },
#pragma warning(suppress: 4047)
{ &MessageWindow, "connect-hwnd", "The HWND we pass in the connect message." },
{ &RepeatDelay, "repeat-delay", "Milliseconds to pause between repeat ops." },
};
for (ULONG Var = 0; Var < _countof(TunableSettings); Var++) {
// If ParamCount is 2, then a value was specified.
if (ParamCount == 2 && strcmp(TunableSettings[Var].Name, *Parameters) == 0) {
if (strcmp(Command, "set") == 0) {
*(TunableSettings[Var].Value) = DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "add") == 0) {
*(TunableSettings[Var].Value) += DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "sub") == 0) {
*(TunableSettings[Var].Value) -= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "neg") == 0) {
*(TunableSettings[Var].Value) = -DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "and") == 0) {
*(TunableSettings[Var].Value) &= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "shr") == 0) {
*(TunableSettings[Var].Value) >>= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "shl") == 0) {
*(TunableSettings[Var].Value) <<= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "or") == 0) {
*(TunableSettings[Var].Value) |= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "xor") == 0) {
*(TunableSettings[Var].Value) ^= DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "not") == 0) {
*(TunableSettings[Var].Value) = ~DecodeIntegerParameter(Parameters[1]);
} else if (strcmp(Command, "eq") == 0) {
*(TunableSettings[Var].Value) =
*(TunableSettings[Var].Value) == DecodeIntegerParameter(Parameters[1]);
}
}
// No value, just print.
if (ParamCount == 1 && strcmp(TunableSettings[Var].Name, *Parameters) == 0) {
LogMessage(stdout, "%s", TunableSettings[Var].Description);
}
// No name, print everything.
if (ParamCount == 0 || (strcmp(TunableSettings[Var].Name, *Parameters) == 0 && !NonInteractive)) {
LogMessage(stdout, "%-20s = %#llx", TunableSettings[Var].Name, *(TunableSettings[Var].Value));
}
}
return 1;
}
ULONG StackHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
if (LeakedStackPointer == 0) {
LogMessage(stderr, "No stack pointer leaked yet, marshal some parameters.");
return 1;
}
LogMessage(stdout, "%#llx", LeakedStackPointer);
return 1;
}
ULONG ExitHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
return 0;
}
ULONG SleepHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
Sleep(DecodeIntegerParameter(*Parameters));
return 1;
}
ULONG HelpHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
if (ParamCount == 0) {
LogMessage(stdout, "Type `help <command>` for help with a specific command.");
LogMessage(stdout, "Any line beginning with # is considered a comment.\n");
}
for (int i = 0; i < _countof(CommandHandlers); i++) {
// List all commands.
if (ParamCount == 0 && CommandHandlers[i].Description)
LogMessage(stdout, "%-16s- %s", CommandHandlers[i].Command, CommandHandlers[i].Description);
// Query specific command.
if (ParamCount == 1 && stricmp(CommandHandlers[i].Command, *Parameters) == 0) {
if (CommandHandlers[i].Description) {
LogMessage(stdout, "%s\n", CommandHandlers[i].Description);
} else {
LogMessage(stdout, "%s is an alias", *Parameters);
}
// Show detailed help.
if (CommandHandlers[i].LongDescription)
LogMessage(stdout, "%s", CommandHandlers[i].LongDescription);
// No need to keep searching.
break;
}
}
if (PortHandle == NULL)
LogMessage(stdout, "Most commands require a connection, see \"help connect\".");
return 1;
}
ULONG InfoHandler(PCHAR Commad, ULONG ParamCount, PCHAR *Parameters)
{
CTF_MSGBASE Message;
HRESULT Result;
ZeroMemory(&Message, sizeof Message);
Message.Message = MSG_GETMONITORPID;
Message.SrcThreadId = ClientThreadId;
Result = SendReceivePortMessage(PortHandle,
&Message.Header,
sizeof Message,
NULL);
if (Result != 0) {
LogMessage(stdout, "The command failed with error %#x", Result);
return 1;
}
LogMessage(stdout, "The server responded.");
LogMessage(stdout, "\tMonitor PID: %u", Message.Params[0]);
return 1;
}
ULONG ScanHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
UINT Count = 0;
CTF_MSGBASE Message;
HRESULT Result;
HANDLE SnapshotHandle;
HWND ClientWindow;
LARGE_INTEGER Timeout = {
.QuadPart = -100000LL,
};
THREADENTRY32 ThreadData = {
.dwSize = sizeof(ThreadData),
};
SnapshotHandle = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
if (SnapshotHandle == INVALID_HANDLE_VALUE) {
LogMessage(stderr, "failed to create tool snapshot");
goto cleanup;
}
if (Thread32First(SnapshotHandle, &ThreadData) == false) {
LogMessage(stderr, "failed to query system threads");
goto cleanup;
}
do {
ZeroMemory(&Message, sizeof Message);
// Note that nothing is stopping clients lying.
// MSG_GETCLIENTINFOEX accepts
// [0] ThreadId
// MSG_GETCLIENTINFOEX returns
// [0] Client Flags
// [1] ProcessId
// [2] GetTickCount() generated by client when registering.
Message.Message = MSG_GETCLIENTINFOEX;
Message.SrcThreadId = ClientThreadId;
Message.Params[0] = ThreadData.th32ThreadID;
Result = SendReceivePortMessage(PortHandle,
&Message.Header,
sizeof Message,
&Timeout);
if (Result != 0) {
LogMessage(stderr, "failed to send message to server, giving up, %#x", Result);
goto cleanup;
}
if (Message.Result == 0) {
PCHAR ImageName;
ULONG Flags;
HANDLE Process;
Flags = Message.Params[0];
// Ask what their HWND is.
Message.Message = MSG_GETTHREADHWND;
Message.SrcThreadId = ClientThreadId;
Message.Params[0] = ThreadData.th32ThreadID;
Result = SendReceivePortMessage(PortHandle,
&Message.Header,
sizeof Message,
&Timeout);
if (Result == 0 && Message.Result == 0) {
#pragma warning(suppress: 4312)
ClientWindow = (HWND) Message.Params[0];
}
// Figure out who owns this thread.
ImageName = QueryImageName(ThreadData.th32OwnerProcessID);
LogMessage(stdout, "Client %u, Tid %4u (Flags %#04x, Hwnd %p, Pid %u, %s)",
Count++,
ThreadData.th32ThreadID,
Flags,
ClientWindow,
ThreadData.th32OwnerProcessID,
ImageName);
}
} while(Thread32Next(SnapshotHandle, &ThreadData));
cleanup:
if (SnapshotHandle != INVALID_HANDLE_VALUE) {
#pragma warning(suppress: 6387)
CloseHandle(SnapshotHandle);
}
return 1;
}
ULONG ForgetHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
NumStubs = 0;
LogMessage(stdout, "All Stubs Forgotten.");
return 1;
}
ULONG CreateStubHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
PCTF_MARSHAL_PARAM CreateParams;
WCHAR WideParameter[128] = {0};
PKNOWN_INTERFACE ClassName;
ULONG CreateParamCount = 4;
HRESULT Result;
UINT64 InterfaceType;
DWORD ThreadId;
GUID *Interface;
GUID ParsedClass = {0};
// createstub thread type interface
ThreadId = DecodeIntegerParameter(Parameters[0]);
InterfaceType = DecodeIntegerParameter(Parameters[1]);
ThreadId = ThreadId ? ThreadId : DefaultThread;
// First see if user specified a GUID.
_snwprintf(WideParameter, _countof(WideParameter) - 1, L"{%hs}", Parameters[2]);
#pragma warning(suppress: 6053)
if (CLSIDFromString(WideParameter, &ParsedClass) == 0) {
LogMessage(stdout, "parsed '%s' as a GUID", Parameters[2]);
Interface = &ParsedClass;
} else {
ULONG NumInterfaces = _countof(KnownInterfaces);
#pragma warning(push)
#pragma warning(disable : 4090 4028)
ClassName = lfind(Parameters[2],
KnownInterfaces,
&NumInterfaces,
sizeof(*KnownInterfaces),
CompareFirst);
#pragma warning(pop)
if (ClassName) {
#pragma warning(suppress : 4090)
Interface = ClassName->Interface;
} else {
LogMessage(stderr, "Cannot parse '%s' as a GUID or recognised interface.", Parameters[2]);
LogMessage(stderr, "These are the interface names I know:");
for (int i = 0; i < NumInterfaces; i++) {
LogMessage(stderr, "\t%s", KnownInterfaces[i].Name);
}
return 1;
}
}
CreateParams = MarshalParamsInsertData(NULL, CreateParamCount, 0, MARSHAL_FLAG_INPUT | MARSHAL_TYPE_INT, NULL, sizeof(UINT64), FALSE);
CreateParams = MarshalParamsInsertData(CreateParams, CreateParamCount, 1, MARSHAL_FLAG_INPUT | MARSHAL_TYPE_INT, &InterfaceType, sizeof(UINT64), FALSE);
CreateParams = MarshalParamsInsertData(CreateParams, CreateParamCount, 2, MARSHAL_FLAG_INPUT | MARSHAL_TYPE_DATA, Interface, sizeof(GUID), FALSE);
CreateParams = MarshalParamsInsertData(CreateParams, CreateParamCount, 3, MARSHAL_FLAG_OUTPUT | MARSHAL_FLAG_ARRAY | MARSHAL_TYPE_COM, NULL, sizeof(UINT64), FALSE);
Result = SendReceiveMarshalData(PortHandle,
MSG_CREATESTUB | MSGFLAG_DATA_APPENDED,
CreateParams,
CreateParamCount,
ThreadId);
if (Result != 0) {
LogMessage(stderr, "Command failed, returned %#x", Result);
goto cleanup;
}
LogMessage(stderr, "Command succeeded, stub created");
MarshalParamsDumpData(CreateParams, 3);
if (NumStubs >= MAX_STUBS) {
LogMessage(stderr, "Sorry, ran out of stub storage space, see `help forget`.");
goto cleanup;
}
// Remember this stub so used doesnt have to type it all in.
StubRecords[NumStubs].ThreadId = ThreadId;
// Copy over the details.
memcpy(&StubRecords[NumStubs].Stub,
MarshalDataPtr(PVOID, CreateParams, 3),
sizeof(CTF_MARSHAL_COMSTUB));
// Record the last stubid seen.
DefaultStub = StubRecords[NumStubs].Stub.StubId;
// Done saving stubs.
NumStubs++;
cleanup:
MarshalParamsFree(CreateParams);
return 1;
}
ULONG CallStubHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD ThreadId;
DWORD StubId;
DWORD FunctionNum;
HRESULT Result;
PCTF_MARSHAL_COMSTUB StubRecord;
// callstub thread id functionnum
ThreadId = DecodeIntegerParameter(Parameters[0]);
StubId = DecodeIntegerParameter(Parameters[1]);
FunctionNum = DecodeIntegerParameter(Parameters[2]);
StubRecord = NULL;
ThreadId = ThreadId ? ThreadId : DefaultThread;
StubId = StubId ? StubId : DefaultStub;
// First search for this stub
for (int i = 0; i < NumStubs; i++) {
if (StubRecords[i].ThreadId == ThreadId
&& StubRecords[i].Stub.StubId == StubId) {
StubRecord = &StubRecords[i].Stub;
break;
}
}
if (StubRecord == NULL) {
LogMessage(stderr, "Sorry, I don't recognise stub %u for thread %u", StubId, ThreadId);
return 1;
}
if (CurrentMarshalParam != CountMarshalParams) {
LogMessage(stderr, "You haven't specified all %u parameters.", CountMarshalParams);
return 1;
}
// Now we need to create the proxy data.
Result = SendReceiveProxyData(PortHandle,
MSG_CALLSTUB | MSGFLAG_DATA_APPENDED,
MarshalParams,
CountMarshalParams,
StubRecord,
FunctionNum,
ThreadId);
if (Result != 0) {
if (NonInteractive == FALSE) {
LogMessage(stderr, "Sending the Proxy data failed, %#x", Result);
}
return 1;
}
LogMessage(stderr, "Command succeeded.");
// Search through the parameters for any stubs we need to know about.
for (ULONG Index = 0; Index < CountMarshalParams; Index++) {
if (MarshalParams[Index].TypeFlags & MARSHAL_FLAG_OUTPUT) {
LogMessage(stdout, "Parameter %u has the output flag set.", Index);
MarshalParamsDumpData(MarshalParams, Index);
// Remember this stub so user doesnt have to type it all in.
if ((MarshalParams[Index].TypeFlags & MARSHAL_TYPE_MASK) == MARSHAL_TYPE_COM) {
if (NumStubs >= MAX_STUBS) {
LogMessage(stderr, "Sorry, ran out of stub storage space, see `help forget`.");
continue;
}
StubRecords[NumStubs].ThreadId = ThreadId;
// Copy over the details.
memcpy(&StubRecords[NumStubs].Stub,
MarshalDataPtr(PVOID, MarshalParams, Index),
sizeof(CTF_MARSHAL_COMSTUB));
// Record the last stubid seen.
DefaultStub = StubRecords[NumStubs].Stub.StubId;
// Done saving stubs.
NumStubs++;
LogMessage(stdout, "StubID %llu recorded.", DefaultStub);
}
}
}
return 1;
}
ULONG MarshalHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD ThreadId;
DWORD MessageNum;
HRESULT Result;
// marshal thread message
ThreadId = DecodeIntegerParameter(*Parameters);
ThreadId = ThreadId ? ThreadId : DefaultThread;
if (GetCommandNum(Parameters[1]) >= 0) {
MessageNum = GetCommandNum(Parameters[1]);
} else {
MessageNum = DecodeIntegerParameter(Parameters[1]);
}
if (CurrentMarshalParam != CountMarshalParams) {
LogMessage(stderr, "You haven't specified all %u parameters, is that intentional?", CountMarshalParams);
}
// Send data to the server.
Result = SendReceiveMarshalData(PortHandle,
MessageNum | MSGFLAG_DATA_APPENDED,
MarshalParams,
CountMarshalParams,
ThreadId);
LogMessage(stderr, "Result: %#x, use `getarg` if you want to examine data",
Result);
return 1;
}
ULONG SetArgHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD TypeFlags = 0;
DWORD Size = 0;
PVOID Value = NULL;
// setarg count
if (ParamCount == 1) {
MarshalParamsFree(MarshalParams);
CurrentMarshalParam = 0;
CountMarshalParams = DecodeIntegerParameter(*Parameters);
MarshalParams = NULL;
if (NonInteractive == FALSE) {
LogMessage(stderr, "New Parameter Chain, Length %u", CountMarshalParams);
}
return 1;
}
if (ParamCount < 2) {
LogMessage(stderr, "Not enough parameters!");
return 1;
}
if (CurrentMarshalParam >= CountMarshalParams) {
LogMessage(stderr, "Sorry, you must declare how many params you need using setarg.");
LogMessage(stderr, "This param would take you over the limit of %u you specified.", CountMarshalParams);
return 1;
}
// Consume everything until the last parameter (the value)
for (ULONG Position = 0; Position < ParamCount - 1; Position++) {
DWORD DecodedFlag = GetMarshalFlagNum(Parameters[Position]);
// Zero is a valid type, so check this round trips to validate.
if (strcmp(GetMarshalFlagName(DecodedFlag), Parameters[Position]) == 0) {
TypeFlags |= DecodedFlag;
} else {
TypeFlags |= DecodeIntegerParameter(Parameters[Position]);
}
}
switch (TypeFlags & MARSHAL_TYPE_MASK) {
default:
LogMessage(stderr, "Type not supported yet, treating as data.");
// fallthrough, maybe just treating it like data will work.
case MARSHAL_TYPE_STRUCT:
case MARSHAL_TYPE_DATA: {
static GUID ParsedGuid;
static BYTE HexBuf[MAX_BUF];
WCHAR WideParameter[512] = {0};
CHAR CurrentChar[3] = {0};
PCHAR ByteString = Parameters[ParamCount - 1];
ULONG ParamLength = strlen(ByteString);
// First we try to parse it as a GUID, a very common case in CTF.
// The format is 00000000-0000-0000-0000-000000000000
_snwprintf(WideParameter, _countof(WideParameter) - 1, L"{%hs}", ByteString);
#pragma warning(suppress: 6053)
if (CLSIDFromString(WideParameter, &ParsedGuid) == 0) {
Value = &ParsedGuid;
Size = sizeof ParsedGuid;
break;
}
// FIXME: dont handle spaces
// Maybe it's a string, the format is "arbitrary data"
if (ParamLength >= 2 && ByteString[0] == '"' && ByteString[ParamLength-1] == '"') {
// It is a string, just strcpy the data. If you want special characters, use hex mode.
Value = &ByteString[1];
Size = ParamLength - 2; // for the quotes.
break;
}
// Maybe it's a string, but the user wants us to convert it to UTF-16
if (ParamLength >= 3 && ByteString[0] == 'L' && ByteString[1] == '"' && ByteString[ParamLength-1] == '"') {
_snwprintf(WideParameter, _countof(WideParameter), L"%hs", ByteString + 2);
Value = WideParameter;
Size = (ParamLength - 3) * sizeof(WCHAR); // -3 for the quotes and 'L'
break;
}
// The only other option is a hex buffer.
if (strlen(ByteString) & 1) {
LogMessage(stderr, "Parsing as a hex string, but you didn't specify enough characters!");
return 1;
}
if (strlen(ByteString) > MAX_BUF * 2) {
LogMessage(stderr, "Parsing as a hex string, but you specified too many characters!");
return 1;
}
// Parse as a hex string, e.g. 41414141412eff00
for (Size = 0; *ByteString;) {
CurrentChar[0] = *ByteString++;
CurrentChar[1] = *ByteString++;
#pragma warning(suppress: 6328)
if (sscanf(CurrentChar, "%hhx", &HexBuf[Size++]) != 1) {
LogMessage(stderr, "Parsing hex string but failed, I stopped at %s", CurrentChar);
return 1;
}
}
Value = HexBuf;
break;
}
case MARSHAL_TYPE_COM: {
static CTF_MARSHAL_COMSTUB ComStub;
DWORD StubId;
StubId = DecodeIntegerParameter(Parameters[ParamCount - 1]);
Value = &ComStub;
Size = sizeof(ComStub);
// First search for this stub
for (int i = 0; i < NumStubs; i++) {
if (StubRecords[i].Stub.StubId == StubId) {
memcpy(&ComStub, &StubRecords[i].Stub, sizeof ComStub);
break;
}
}
break;
}
case MARSHAL_TYPE_LONG:
case MARSHAL_TYPE_WORD:
case MARSHAL_TYPE_INT: {
static UINT64 Number;
Number = DecodeIntegerParameter(Parameters[ParamCount - 1]);
Value = &Number;
Size = sizeof(UINT64);
break;
}
}
MarshalParams = MarshalParamsInsertData(MarshalParams,
CountMarshalParams,
CurrentMarshalParam,
TypeFlags,
Value,
Size,
FALSE);
if (NonInteractive == FALSE) {
MarshalParamsDumpData(MarshalParams, CurrentMarshalParam);
}
CurrentMarshalParam++;
return 1;
}
ULONG GetArgHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD Index = DecodeIntegerParameter(Parameters[0]);
if (Index >= CurrentMarshalParam) {
LogMessage(stderr, "Bad index requested!");
return 1;
}
MarshalParamsDumpData(MarshalParams, Index);
return 1;
}
ULONG ModuleHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
LastModuleBase = QueryModuleHandle32(*Parameters);
LogMessage(stdout, "%#llx", LastModuleBase);
return 1;
}
ULONG ModuleHandler64(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
LastModuleBase = QueryModuleHandle64(*Parameters);
LogMessage(stdout, "%#llx", LastModuleBase);
return 1;
}
ULONG EditArgHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD Index = DecodeIntegerParameter(*Parameters);
if (Index >= CurrentMarshalParam) {
LogMessage(stderr, "Bad index requested!");
return 1;
}
MarshalParams[Index].TypeFlags = DecodeIntegerParameter(Parameters[1]);
MarshalParamsDumpData(MarshalParams, Index);
return 1;
}
ULONG PatchHandler(PCHAR Command, ULONG ParamCount, PCHAR *Parameters)
{
DWORD Index;
DWORD Offset;
DWORD Width;
DWORD Shift;
UINT64 Adjust;
UINT64 Value;
Width = Index = Offset = Value = Shift = Adjust = 0;
switch (ParamCount) {
case 6: Shift = DecodeIntegerParameter(Parameters[5]);
case 5: Adjust = DecodeIntegerParameter(Parameters[4]);
case 4: Index = DecodeIntegerParameter(Parameters[0]);
Offset = DecodeIntegerParameter(Parameters[1]);
Value = DecodeIntegerParameter(Parameters[2]);
Width = DecodeIntegerParameter(Parameters[3]);
}
if (Index >= CurrentMarshalParam) {
LogMessage(stderr, "Bad index requested!");
return 1;
}
if (Offset + Width > MarshalParams[Index].Size) {
LogMessage(stderr, "Bad offset or width, the parameter is only %#x bytes",
MarshalParams[Index].Size);
return 1;
}