Sliver Protobuf updates

client/command/filesystem/mount.go

@@ -0,0 +1,149 @@
+/*
+	Sliver Implant Framework
+	Copyright (C) 2023  Bishop Fox
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package filesystem
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"google.golang.org/protobuf/proto"
+
+	"github.com/jedib0t/go-pretty/v6/table"
+	"github.com/spf13/cobra"
+
+	"github.com/bishopfox/sliver/client/command/settings"
+	"github.com/bishopfox/sliver/client/console"
+	"github.com/bishopfox/sliver/protobuf/clientpb"
+	"github.com/bishopfox/sliver/protobuf/sliverpb"
+)
+
+// MountCmd - Print information about mounted filesystems
+func MountCmd(cmd *cobra.Command, con *console.SliverConsoleClient, args []string) {
+	session, beacon := con.ActiveTarget.GetInteractive()
+	if session == nil && beacon == nil {
+		return
+	}
+	mount, err := con.Rpc.Mount(context.Background(), &sliverpb.MountReq{
+		Request: con.ActiveTarget.Request(cmd),
+	})
+	if err != nil {
+		con.PrintErrorf("%s\n", err)
+		return
+	}
+	os := getOS(session, beacon)
+	if mount.Response != nil && mount.Response.Async {
+		con.AddBeaconCallback(mount.Response.TaskID, func(task *clientpb.BeaconTask) {
+			err = proto.Unmarshal(task.Response, mount)
+			if err != nil {
+				con.PrintErrorf("Failed to decode response %s\n", err)
+				return
+			}
+			PrintMount(os, mount, con)
+		})
+		con.PrintAsyncResponse(mount.Response)
+	} else {
+		PrintMount(os, mount, con)
+	}
+}
+
+func getOS(session *clientpb.Session, beacon *clientpb.Beacon) string {
+	if session != nil {
+		return session.OS
+	} else if beacon != nil {
+		return beacon.OS
+	}
+	return ""
+}
+
+func reduceSpaceMetric(numberOfBytes float64) string {
+	units := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
+
+	if numberOfBytes < 1 {
+		return fmt.Sprintf("0 %s", units[0])
+	}
+
+	base := 1024.0
+
+	exp := math.Floor(math.Log(numberOfBytes) / math.Log(base))
+	index := int(math.Min(exp, float64(len(units)-1)))
+	divisor := math.Pow(base, float64(index))
+
+	value := numberOfBytes / divisor
+
+	return fmt.Sprintf("%.2f %s", value, units[index])
+}
+
+// PrintMount - Print a table containing information on mounted filesystems
+func PrintMount(os string, mount *sliverpb.Mount, con *console.SliverConsoleClient) {
+	if mount.Response != nil && mount.Response.Err != "" {
+		con.PrintErrorf("%s\n", mount.Response.Err)
+		return
+	}
+	tw := table.NewWriter()
+	tw.SetStyle(settings.GetTableStyle(con))
+
+	switch os {
+	case "windows":
+		tw.AppendHeader(table.Row{"Volume", "Volume Type", "Mount Point", "Label", "Filesystem", "Used Space", "Free Space", "Total Space"})
+	case "darwin":
+		fallthrough
+	case "linux":
+		fallthrough
+	default:
+		tw.AppendHeader(table.Row{"Source", "Mount Point", "Mount Root", "Filesystem Type", "Options", "Total Space"})
+	}
+
+	for _, mountPoint := range mount.Info {
+		row := mountRow(os, mountPoint)
+		tw.AppendRow(row)
+	}
+
+	settings.PaginateTable(tw, 0, false, false, con)
+}
+
+func mountRow(os string, mountInfo *sliverpb.MountInfo) table.Row {
+	var row table.Row
+
+	switch os {
+	case "windows":
+		row = table.Row{mountInfo.VolumeName,
+			mountInfo.VolumeType,
+			mountInfo.MountPoint,
+			mountInfo.Label,
+			mountInfo.FileSystem,
+			reduceSpaceMetric(float64(mountInfo.UsedSpace)),
+			reduceSpaceMetric(float64(mountInfo.FreeSpace)),
+			reduceSpaceMetric(float64(mountInfo.TotalSpace)),
+		}
+	case "darwin":
+		fallthrough
+	case "linux":
+		fallthrough
+	default:
+		row = table.Row{mountInfo.VolumeName,
+			mountInfo.MountPoint,
+			mountInfo.Label,
+			mountInfo.VolumeType,
+			mountInfo.MountOptions,
+			reduceSpaceMetric(float64(mountInfo.TotalSpace)),
+		}
+	}
+	return row
+}

client/command/help/long-help.go

@@ -79,6 +79,7 @@ var (
 		consts.PsExecStr:           psExecHelp,
 		consts.BackdoorStr:         backdoorHelp,
 		consts.SpawnDllStr:         spawnDllHelp,
+		consts.MountStr:            mountHelp,
 
 		consts.WebsitesStr:                  websitesHelp,
 		consts.ScreenshotStr:                screenshotHelp,
@@ -379,6 +380,9 @@ On Windows, escaping is disabled. Instead, '\\' is treated as path separator.`
 [[.Bold]]About:[[.Normal]] (Windows Only) Executes the .NET assembly in a child process.
 `
 
+	mountHelp = `[[.Bold]]Command:[[.Normal]] mount
+[[.Bold]]About:[[.Normal]] Displays information about mounted drives on the system, including mount point, space metrics, and filesystem.`
+
 	executeShellcodeHelp = `[[.Bold]]Command:[[.Normal]] execute-shellcode [local path to raw shellcode]
 [[.Bold]]About:[[.Normal]] Executes the given shellcode in the implant's process.
 

client/command/sliver.go

@@ -1090,6 +1090,20 @@ func SliverCommands(con *client.SliverConsoleClient) console.Commands {
 
 		carapace.Gen(memfilesRmCmd).PositionalCompletion(carapace.ActionValues().Usage("memfile file descriptor"))
 
+		mountCmd := &cobra.Command{
+			Use:   consts.MountStr,
+			Short: "Get information on mounted filesystems",
+			Long:  help.GetHelpFor([]string{consts.MountStr}),
+			Run: func(cmd *cobra.Command, args []string) {
+				filesystem.MountCmd(cmd, con, args)
+			},
+			GroupID: consts.FilesystemHelpGroup,
+		}
+		Flags("", false, mountCmd, func(f *pflag.FlagSet) {
+			f.Int64P("timeout", "t", defaultTimeout, "grpc timeout in seconds")
+		})
+		sliver.AddCommand(mountCmd)
+
 		// [ Network ] ---------------------------------------------
 
 		ifconfigCmd := &cobra.Command{

client/constants/constants.go

@@ -219,6 +219,7 @@ const (
 	ChmodStr    = "chmod"
 	ChownStr    = "chown"
 	ChtimesStr  = "chtimes"
+	MountStr    = "mount"
 
 	MemfilesStr = "memfiles"
 

implant/sliver/handlers/handlers_linux.go

@@ -32,6 +32,7 @@ import (
 	"unsafe"
 
 	"github.com/bishopfox/sliver/implant/sliver/procdump"
+	"github.com/bishopfox/sliver/implant/sliver/mount"
 	"github.com/bishopfox/sliver/implant/sliver/taskrunner"
 	"github.com/bishopfox/sliver/protobuf/commonpb"
 	"github.com/bishopfox/sliver/protobuf/sliverpb"
@@ -71,6 +72,7 @@ var (
 		sliverpb.MsgReconfigureReq: reconfigureHandler,
 		sliverpb.MsgSSHCommandReq:  runSSHCommandHandler,
 		sliverpb.MsgProcessDumpReq: dumpHandler,
+		sliverpb.MsgMountReq:       mountHandler,
 		sliverpb.MsgGrepReq:        grepHandler,
 
 		// Wasm Extensions - Note that execution can be done via a tunnel handler
@@ -124,6 +126,27 @@ func dumpHandler(data []byte, resp RPCResponse) {
 	resp(data, err)
 }
 
+func mountHandler(data []byte, resp RPCResponse) {
+	mountReq := &sliverpb.MountReq{}
+	err := proto.Unmarshal(data, mountReq)
+	if err != nil {
+		return
+	}
+
+	mountData, err := mount.GetMountInformation()
+	mountResp := &sliverpb.Mount{
+		Info:     mountData,
+		Response: &commonpb.Response{},
+	}
+
+	if err != nil {
+		mountResp.Response.Err = err.Error()
+	}
+
+	data, err = proto.Marshal(mountResp)
+	resp(data, err)
+}
+
 func taskHandler(data []byte, resp RPCResponse) {
 	var err error
 	task := &sliverpb.TaskReq{}

implant/sliver/handlers/handlers_windows.go

@@ -34,6 +34,7 @@ import (
 	"syscall"
 
 	"github.com/bishopfox/sliver/implant/sliver/extension"
+	"github.com/bishopfox/sliver/implant/sliver/mount"
 	"github.com/bishopfox/sliver/implant/sliver/priv"
 	"github.com/bishopfox/sliver/implant/sliver/procdump"
 	"github.com/bishopfox/sliver/implant/sliver/registry"
@@ -86,6 +87,7 @@ var (
 		sliverpb.MsgRegistryDeleteKeyReq:   regDeleteKeyHandler,
 		sliverpb.MsgRegistrySubKeysListReq: regSubKeysListHandler,
 		sliverpb.MsgRegistryListValuesReq:  regValuesListHandler,
+		sliverpb.MsgMountReq:               mountHandler,
 
 		// Generic
 		sliverpb.MsgPing:           pingHandler,
@@ -736,6 +738,28 @@ func getPrivsHandler(data []byte, resp RPCResponse) {
 	resp(data, err)
 }
 
+func mountHandler(data []byte, resp RPCResponse) {
+	mountReq := &sliverpb.MountReq{}
+
+	err := proto.Unmarshal(data, mountReq)
+	if err != nil {
+		return
+	}
+
+	mountData, err := mount.GetMountInformation()
+	mountResp := &sliverpb.Mount{
+		Info:     mountData,
+		Response: &commonpb.Response{},
+	}
+
+	if err != nil {
+		mountResp.Response.Err = err.Error()
+	}
+
+	data, err = proto.Marshal(mountResp)
+	resp(data, err)
+}
+
 // Extensions
 
 func registerExtensionHandler(data []byte, resp RPCResponse) {

implant/sliver/mount/mount_linux.go

@@ -0,0 +1,56 @@
+// +linux
+
+package mount
+
+import (
+	"bufio"
+	"os"
+	"strings"
+	"syscall"
+
+	"github.com/bishopfox/sliver/protobuf/sliverpb"
+)
+
+func GetMountInformation() ([]*sliverpb.MountInfo, error) {
+	mountInfo := make([]*sliverpb.MountInfo, 0)
+
+	file, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return mountInfo, err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+
+		// Extract fields according to the /proc/self/mountinfo format
+		// https://man7.org/linux/man-pages/man5/proc.5.html
+		mountRoot := fields[3]
+		mountPoint := fields[4]
+		mountOptions := fields[5]
+		mountType := fields[len(fields)-3]
+		mountSource := fields[len(fields)-2]
+
+		// Get mount information using statfs
+		var stat syscall.Statfs_t
+		err := syscall.Statfs(mountPoint, &stat)
+		if err != nil {
+			continue
+		}
+
+		var mountData sliverpb.MountInfo
+
+		mountData.Label = mountRoot
+		mountData.MountPoint = mountPoint
+		mountData.VolumeType = mountType
+		mountData.VolumeName = mountSource
+		mountData.MountOptions = mountOptions
+		mountData.TotalSpace = stat.Blocks * uint64(stat.Bsize)
+		mountInfo = append(mountInfo, &mountData)
+
+	}
+
+	return mountInfo, nil
+}

implant/sliver/mount/mount_windows.go

@@ -0,0 +1,287 @@
+//go:build windows
+// +build windows
+
+/*
+	Sliver Implant Framework
+	Copyright (C) 2023  Bishop Fox
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package mount
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"unicode/utf16"
+	"unsafe"
+
+	"github.com/bishopfox/sliver/protobuf/sliverpb"
+
+	"golang.org/x/sys/windows"
+)
+
+const (
+	pathLength             = windows.MAX_PATH + 1
+	volumePathsLength      = 32769 // 32K + 1 for a null terminator
+	universalNameInfoLevel = 1
+	remoteNameInfoLevel    = 2
+	remoteNameMaxLength    = 1024
+)
+
+type UniversalNameInfo struct {
+	UniversalName [remoteNameMaxLength]uint16
+}
+
+var driveTypeMap = map[uint32]string{
+	0: "Unknown",
+	1: "Root Path invalid (no volume mounted for path)",
+	2: "Removable",
+	3: "Fixed disk",
+	4: "Remote / network drive",
+	5: "CD-ROM",
+	6: "RAM disk",
+}
+
+func findAllVolumes() ([]string, error) {
+	var volumes []string
+
+	volumeGuid := make([]uint16, pathLength)
+	handle, err := windows.FindFirstVolume(&volumeGuid[0], pathLength)
+	defer windows.FindVolumeClose(handle)
+	if err != nil {
+		return volumes, err
+	}
+
+	volumes = append(volumes, windows.UTF16ToString(volumeGuid))
+
+	// Keep gathering volumes until we cannot find anymore
+	for {
+		err = windows.FindNextVolume(handle, &volumeGuid[0], pathLength)
+		if err != nil {
+			if err == windows.ERROR_NO_MORE_FILES {
+				// Then we are done
+				break
+			} else {
+				return volumes, err
+			}
+		}
+		volumes = append(volumes, windows.UTF16ToString(volumeGuid))
+	}
+
+	return volumes, nil
+}
+
+func findMountPointsForVolume(volumeName string) ([]string, error) {
+	const nullByte uint16 = 0
+	var volumeMounts []string
+
+	mountsForVolume := make([]uint16, volumePathsLength)
+	var returnedInformationLength uint32 = 0
+	volNameUint, err := windows.UTF16PtrFromString(volumeName)
+	if err != nil {
+		return volumeMounts, err
+	}
+	err = windows.GetVolumePathNamesForVolumeName(volNameUint, &mountsForVolume[0], volumePathsLength, &returnedInformationLength)
+	if err != nil {
+		if err == windows.ERROR_MORE_DATA {
+			// Then we need to make the buffer bigger and try again
+			// We will try one more time
+			mountsForVolume := make([]uint16, returnedInformationLength)
+			err = windows.GetVolumePathNamesForVolumeName(volNameUint, &mountsForVolume[0], volumePathsLength, &returnedInformationLength)
+			if err != nil {
+				return volumeMounts, err
+			}
+		} else {
+			return volumeMounts, err
+		}
+	}
+
+	/*
+		Because the buffer contains multiple strings separated by a null terminator, we will read the
+		buffer in chunks and separate the strings
+	*/
+	volumeMounts = splitStringBuffer(mountsForVolume)
+
+	return volumeMounts, nil
+}
+
+func splitStringBuffer(buffer []uint16) []string {
+	bufferString := string(utf16.Decode(buffer))
+	return strings.Split(strings.TrimRight(bufferString, "\x00"), "\x00")
+}
+
+func getAllDrives() ([]string, error) {
+	var logicalDrives []string
+
+	// Get necessary buffer size
+	n, err := windows.GetLogicalDriveStrings(0, nil)
+	driveStrings := make([]uint16, n)
+	_, err = windows.GetLogicalDriveStrings(n, &driveStrings[0])
+	if err != nil {
+		return logicalDrives, err
+	}
+
+	logicalDrives = splitStringBuffer(driveStrings)
+
+	return logicalDrives, nil
+}
+
+func getDriveType(driveSpec string) string {
+	driveUTF16, err := windows.UTF16PtrFromString(driveSpec)
+	if err != nil {
+		return ""
+	}
+	driveTypeValue := windows.GetDriveType(driveUTF16)
+
+	if driveType, ok := driveTypeMap[driveTypeValue]; ok {
+		return driveType
+	} else {
+		return driveTypeMap[0]
+	}
+}
+
+func getUniversalName(driveSpec string) (string, error) {
+	mpr := windows.NewLazyDLL("mpr.dll")
+	wNetGetUniversalNameWProc := mpr.NewProc("WNetGetUniversalNameW")
+
+	driveUTF16, err := windows.UTF16PtrFromString(driveSpec)
+	if err != nil {
+		return "", err
+	}
+
+	var universalNameBuffer UniversalNameInfo
+	var bufferSize = uint32(unsafe.Sizeof(universalNameBuffer))
+
+	returnCode, _, err := wNetGetUniversalNameWProc.Call(
+		uintptr(unsafe.Pointer(driveUTF16)),
+		uintptr(universalNameInfoLevel),
+		uintptr(unsafe.Pointer(&universalNameBuffer)),
+		uintptr(unsafe.Pointer(&bufferSize)),
+	)
+
+	if returnCode != 0 {
+		// Then there was an error
+		return "", fmt.Errorf("%v", windows.Errno(returnCode).Error())
+	}
+
+	bufferStrings := splitStringBuffer(universalNameBuffer.UniversalName[:])
+	// There is some junk returned at the beginning of the structure. The actual UNC path starts after the first null terminator.
+	if len(bufferStrings) > 1 {
+		return bufferStrings[1], nil
+	} else {
+		return "", errors.New("No valid data returned")
+	}
+}
+
+func getDiskStats(driveSpec string) (uint64, uint64, uint64, error) {
+	var freeSpace uint64 = 0
+	var usedSpace uint64 = 0
+	var totalSpace uint64 = 0
+
+	driveUTF16, err := windows.UTF16PtrFromString(driveSpec)
+	if err != nil {
+		return freeSpace, usedSpace, totalSpace, err
+	}
+
+	err = windows.GetDiskFreeSpaceEx(driveUTF16, nil, &totalSpace, &freeSpace)
+	if err != nil {
+		return freeSpace, usedSpace, totalSpace, err
+	}
+
+	usedSpace = totalSpace - freeSpace
+
+	return freeSpace, usedSpace, totalSpace, nil
+}
+
+func getDriveInfo(driveSpec string) (string, string) {
+	// Get label and filesystem type
+	driveUTF16, err := windows.UTF16PtrFromString(driveSpec)
+	if err != nil {
+		return "", ""
+	}
+
+	volumeNameBuffer := make([]uint16, pathLength)
+	fileSystemNameBuffer := make([]uint16, pathLength)
+
+	err = windows.GetVolumeInformation(driveUTF16, &volumeNameBuffer[0], pathLength, nil, nil, nil, &fileSystemNameBuffer[0], pathLength)
+	if err != nil {
+		return "", ""
+	}
+
+	return windows.UTF16ToString(volumeNameBuffer), windows.UTF16ToString(fileSystemNameBuffer)
+}
+
+func constructDriveVolumeMap() (map[string]string, error) {
+	driveVolumeMap := make(map[string]string)
+
+	volumes, err := findAllVolumes()
+	if err != nil {
+		return driveVolumeMap, err
+	}
+
+	for _, volume := range volumes {
+		mountPoints, err := findMountPointsForVolume(volume)
+		if err != nil {
+			return driveVolumeMap, err
+		}
+		for _, mountPoint := range mountPoints {
+			driveVolumeMap[mountPoint] = volume
+		}
+	}
+	return driveVolumeMap, nil
+}
+
+func GetMountInformation() ([]*sliverpb.MountInfo, error) {
+	mountInfo := make([]*sliverpb.MountInfo, 0)
+
+	logicalDrives, err := getAllDrives()
+	if err != nil {
+		return mountInfo, err
+	}
+
+	driveVolumeMap, err := constructDriveVolumeMap()
+	if err != nil {
+		return mountInfo, err
+	}
+
+	for _, drive := range logicalDrives {
+		var mountData sliverpb.MountInfo
+		mountData.MountPoint = drive
+		mountData.VolumeType = getDriveType(drive)
+		if mountData.VolumeType == driveTypeMap[4] {
+			// Then this is a network drive, so let's figure out the UNC path
+			networkPath, err := getUniversalName(drive)
+			if err != nil {
+				return mountInfo, err
+			}
+			mountData.VolumeName = networkPath
+		} else {
+			mountData.VolumeName = driveVolumeMap[drive]
+		}
+
+		mountData.Label, mountData.FileSystem = getDriveInfo(drive)
+		free, used, total, err := getDiskStats(drive)
+		if err != nil {
+			return mountInfo, err
+		}
+		mountData.UsedSpace = used
+		mountData.FreeSpace = free
+		mountData.TotalSpace = total
+		mountInfo = append(mountInfo, &mountData)
+	}
+
+	return mountInfo, nil
+}

protobuf/clientpb/client.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.26.0
-// 	protoc        v4.25.0
+// 	protoc        v3.15.8
 // source: clientpb/client.proto
 
 package clientpb
@@ -5681,8 +5681,7 @@ func (x *MsfStager) GetFile() *commonpb.File {
 }
 
 // GetSystemReq - Client request to the server which is translated into
-//
+//                InvokeSystemReq when sending to the implant.
-//	InvokeSystemReq when sending to the implant.
 type GetSystemReq struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -5755,8 +5754,7 @@ func (x *GetSystemReq) GetRequest() *commonpb.Request {
 }
 
 // MigrateReq - Client request to the server which is translated into
-//
+//              InvokeMigrateReq when sending to the implant.
-//	InvokeMigrateReq when sending to the implant.
 type MigrateReq struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

protobuf/commonpb/common.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.26.0
-// 	protoc        v4.25.0
+// 	protoc        v3.15.8
 // source: commonpb/common.proto
 
 package commonpb
@@ -131,9 +131,8 @@ func (x *Request) GetSessionID() string {
 }
 
 // Response - Common fields used in all gRPC responses. Note that the Err field
-//
+//            only used when the implant needs to return an error to the server.
-//	only used when the implant needs to return an error to the server.
+//            Client<->Server comms should use normal gRPC error handling.
-//	Client<->Server comms should use normal gRPC error handling.
 type Response struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

protobuf/dnspb/dns.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.31.0
+// 	protoc-gen-go v1.26.0
-// 	protoc        v4.25.0
+// 	protoc        v3.15.8
 // source: dnspb/dns.proto
 
 package dnspb
@@ -87,10 +87,12 @@ func (DNSMessageType) EnumDescriptor() ([]byte, []int) {
 	return file_dnspb_dns_proto_rawDescGZIP(), []int{0}
 }
 
-// NOTE: DNS is very space sensitive so certain fields are re-purposed
-// depending on the DNSMessageType as noted below:
 //
-// [Type TOTP]: ID field is used for the TOTP code
+//NOTE: DNS is very space sensitive so certain fields are re-purposed
+//depending on the DNSMessageType as noted below:
+//
+//[Type TOTP]: ID field is used for the TOTP code
+//
 type DNSMessage struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

protobuf/rpcpb/services.proto

@@ -176,6 +176,7 @@ service SliverRPC {
   rpc MemfilesList(sliverpb.MemfilesListReq) returns (sliverpb.Ls);
   rpc MemfilesAdd(sliverpb.MemfilesAddReq) returns (sliverpb.MemfilesAdd);
   rpc MemfilesRm(sliverpb.MemfilesRmReq) returns (sliverpb.MemfilesRm);
+  rpc Mount(sliverpb.MountReq) returns (sliverpb.Mount);
   rpc ProcessDump(sliverpb.ProcessDumpReq) returns (sliverpb.ProcessDump);
   rpc RunAs(sliverpb.RunAsReq) returns (sliverpb.RunAs);
   rpc Impersonate(sliverpb.ImpersonateReq) returns (sliverpb.Impersonate);

protobuf/sliverpb/constants.go

@@ -342,6 +342,9 @@ const (
 
 	// MsgGrepReq - Request to grep for data
 	MsgGrepReq
+
+	// MsgMountReq - Request filesystem mounts
+	MsgMountReq
 )
 
 // Constants to replace enums
@@ -588,8 +591,12 @@ func MsgNumber(request proto.Message) uint32 {
 	case *GrepReq:
 		return MsgGrepReq
 
+	case *MountReq:
+		return MsgMountReq
+
 	case *MemfilesListReq:
 		return MsgMemfilesListReq
+
 	case *MemfilesAddReq:
 		return MsgMemfilesAddReq
 	case *MemfilesAdd:

protobuf/sliverpb/sliver.proto

@@ -327,6 +327,28 @@ message Grep {
   commonpb.Response Response = 9;
 }
 
+message MountReq {
+  commonpb.Request Request = 9;
+}
+
+message MountInfo {
+  string VolumeName = 1;
+  string VolumeType = 2;
+  string MountPoint = 3;
+  string Label = 4;
+  string FileSystem = 5;
+  uint64 UsedSpace = 6;
+  uint64 FreeSpace = 7;
+  uint64 TotalSpace = 8;
+  string MountOptions = 9;
+}
+
+message Mount {
+  repeated MountInfo Info = 1;
+
+  commonpb.Response Response = 9;
+}
+
 message ProcessDumpReq {
   int32 Pid = 1;
   int32 Timeout = 2;
@@ -340,6 +362,7 @@ message ProcessDump {
   commonpb.Response Response = 9;
 }
 
+
 message RunAsReq {
   string Username = 1;
   string ProcessName = 2;

server/rpc/rpc-filesystem.go

@@ -239,3 +239,13 @@ func (rpc *Server) Grep(ctx context.Context, req *sliverpb.GrepReq) (*sliverpb.G
 	}
 	return resp, nil
 }
+
+// Mount - Get information on mounted filesystems
+func (rpc *Server) Mount(ctx context.Context, req *sliverpb.MountReq) (*sliverpb.Mount, error) {
+	resp := &sliverpb.Mount{Response: &commonpb.Response{}}
+	err := rpc.GenericHandler(req, resp)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}