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package cmd
import (
"context"
"fmt"
"github.com/FalconOpsLLC/goexec/internal/util"
"github.com/FalconOpsLLC/goexec/pkg/goexec"
tschexec "github.com/FalconOpsLLC/goexec/pkg/goexec/tsch"
"github.com/oiweiwei/go-msrpc/ssp/gssapi"
"github.com/spf13/cobra"
"time"
)
func tschCmdInit() {
cmdFlags[tschCmd] = []*flagSet{
defaultAuthFlags,
defaultLogFlags,
defaultNetRpcFlags,
}
tschDemandCmdInit()
tschCreateCmdInit()
tschChangeCmdInit()
tschCmd.PersistentFlags().AddFlagSet(defaultAuthFlags.Flags)
tschCmd.PersistentFlags().AddFlagSet(defaultLogFlags.Flags)
tschCmd.PersistentFlags().AddFlagSet(defaultNetRpcFlags.Flags)
tschCmd.AddCommand(tschDemandCmd, tschCreateCmd, tschChangeCmd)
}
func tschDemandCmdInit() {
tschDemandFlags := newFlagSet("Task Scheduler")
tschDemandFlags.Flags.StringVarP(&tschTask, "task", "t", "", "Name or path of the new task")
tschDemandFlags.Flags.Uint32Var(&tschDemand.SessionId, "session", 0, "Hijack existing session given the session `ID`")
tschDemandFlags.Flags.StringVar(&tschDemand.UserSid, "sid", "S-1-5-18", "User `SID` to impersonate")
tschDemandFlags.Flags.BoolVar(&tschDemand.NoDelete, "no-delete", false, "Don't delete task after execution")
tschDemandExecFlags := newFlagSet("Execution")
registerExecutionFlags(tschDemandExecFlags.Flags)
registerExecutionOutputFlags(tschDemandExecFlags.Flags)
cmdFlags[tschDemandCmd] = []*flagSet{
tschDemandFlags,
tschDemandExecFlags,
defaultAuthFlags,
defaultLogFlags,
defaultNetRpcFlags,
}
tschDemandCmd.Flags().AddFlagSet(tschDemandFlags.Flags)
tschDemandCmd.Flags().AddFlagSet(tschDemandExecFlags.Flags)
tschDemandCmd.MarkFlagsOneRequired("exec", "command")
}
func tschCreateCmdInit() {
tschCreateFlags := newFlagSet("Task Scheduler")
tschCreateFlags.Flags.StringVarP(&tschTask, "task", "t", "", "Name or path of the new task")
tschCreateFlags.Flags.DurationVar(&tschCreate.StopDelay, "delay-stop", 5*time.Second, "Delay between task execution and termination. This won't stop the spawned process")
tschCreateFlags.Flags.DurationVar(&tschCreate.StartDelay, "start-delay", 5*time.Second, "Delay between task registration and execution")
//tschCreateFlags.Flags.DurationVar(&tschCreate.DeleteDelay, "delete-delay", 0*time.Second, "Delay between task termination and deletion")
tschCreateFlags.Flags.BoolVar(&tschCreate.NoDelete, "no-delete", false, "Don't delete task after execution")
tschCreateFlags.Flags.BoolVar(&tschCreate.CallDelete, "call-delete", false, "Directly call SchRpcDelete to delete task")
tschCreateFlags.Flags.StringVar(&tschCreate.UserSid, "sid", "S-1-5-18", "User `SID` to impersonate")
tschCreateExecFlags := newFlagSet("Execution")
registerExecutionFlags(tschCreateExecFlags.Flags)
registerExecutionOutputFlags(tschCreateExecFlags.Flags)
cmdFlags[tschCreateCmd] = []*flagSet{
tschCreateFlags,
tschCreateExecFlags,
defaultAuthFlags,
defaultLogFlags,
defaultNetRpcFlags,
}
tschCreateCmd.Flags().AddFlagSet(tschCreateFlags.Flags)
tschCreateCmd.Flags().AddFlagSet(tschCreateExecFlags.Flags)
tschCreateCmd.MarkFlagsOneRequired("exec", "command")
}
func tschChangeCmdInit() {
tschChangeFlags := newFlagSet("Task Scheduler")
tschChangeFlags.Flags.StringVarP(&tschChange.TaskPath, "task", "t", "", "Path to existing task")
tschChangeFlags.Flags.BoolVar(&tschChange.NoStart, "no-start", false, "Don't start the task")
tschChangeFlags.Flags.BoolVar(&tschChange.NoRevert, "no-revert", false, "Don't restore the original task definition")
tschChangeExecFlags := newFlagSet("Execution")
registerExecutionFlags(tschChangeExecFlags.Flags)
registerExecutionOutputFlags(tschChangeExecFlags.Flags)
cmdFlags[tschChangeCmd] = []*flagSet{
tschChangeFlags,
tschChangeExecFlags,
defaultAuthFlags,
defaultLogFlags,
defaultNetRpcFlags,
}
tschChangeCmd.Flags().AddFlagSet(tschChangeFlags.Flags)
tschChangeCmd.Flags().AddFlagSet(tschChangeExecFlags.Flags)
// Constraints
{
if err := tschChangeCmd.MarkFlagRequired("task"); err != nil {
panic(err)
}
tschChangeCmd.MarkFlagsOneRequired("exec", "command")
}
}
func argsTask(*cobra.Command, []string) error {
switch {
case tschTask == "":
tschTask = `\` + util.RandomString()
case tschexec.ValidateTaskPath(tschTask) == nil:
case tschexec.ValidateTaskName(tschTask) == nil:
tschTask = `\` + tschTask
default:
return fmt.Errorf("invalid task Label or path: %q", tschTask)
}
return nil
}
var (
tschDemand tschexec.TschDemand
tschCreate tschexec.TschCreate
tschChange tschexec.TschChange
tschTask string
tschCmd = &cobra.Command{
Use: "tsch",
Short: "Execute with Windows Task Scheduler (MS-TSCH)",
Long: `Description:
The tsch module makes use of the Windows Task Scheduler service (MS-TSCH) to
spawn processes on the remote target.`,
GroupID: "module",
Args: cobra.NoArgs,
}
tschDemandCmd = &cobra.Command{
Use: "demand [target]",
Short: "Register a remote scheduled task and demand immediate start",
Long: `Description:
Similar to the create method, the demand method will call SchRpcRegisterTask,
But rather than setting a defined time when the task will start, it will
additionally call SchRpcRun to forcefully start the task.`,
Args: args(
argsRpcClient("cifs"),
argsOutput("smb"),
argsTask,
),
Run: func(*cobra.Command, []string) {
tschDemand.IO = exec
tschDemand.Client = &rpcClient
tschDemand.TaskPath = tschTask
ctx := log.With().
Str("module", "tsch").
Str("method", "demand").
Logger().WithContext(gssapi.NewSecurityContext(context.TODO()))
if err := goexec.ExecuteCleanMethod(ctx, &tschDemand, &exec); err != nil {
log.Fatal().Err(err).Msg("Operation failed")
}
},
}
tschCreateCmd = &cobra.Command{
Use: "create [target]",
Short: "Create a remote scheduled task with an automatic start time",
Long: `Description:
The create method calls SchRpcRegisterTask to register a scheduled task
with an automatic start time.This method avoids directly calling SchRpcRun,
and can even avoid calling SchRpcDelete by populating the DeleteExpiredTaskAfter
Setting.`,
Args: args(
argsRpcClient("cifs"),
argsOutput("smb"),
argsTask,
),
Run: func(*cobra.Command, []string) {
tschCreate.Tsch.Client = &rpcClient
tschCreate.IO = exec
tschCreate.TaskPath = tschTask
ctx := log.With().
Str("module", "tsch").
Str("method", "create").
Logger().WithContext(gssapi.NewSecurityContext(context.TODO()))
if err := goexec.ExecuteCleanMethod(ctx, &tschCreate, &exec); err != nil {
log.Fatal().Err(err).Msg("Operation failed")
}
},
}
tschChangeCmd = &cobra.Command{
Use: "change [target]",
Short: "Modify an existing task to spawn an arbitrary process",
Long: `Description:
The change method calls SchRpcRetrieveTask to fetch the definition of an existing
task (-t), then modifies the task definition to spawn a process`,
Args: args(
argsRpcClient("cifs"),
argsOutput("smb"),
func(*cobra.Command, []string) error {
return tschexec.ValidateTaskPath(tschChange.TaskPath)
},
),
Run: func(*cobra.Command, []string) {
tschChange.Tsch.Client = &rpcClient
tschChange.IO = exec
ctx := log.With().
Str("module", "tsch").
Str("method", "change").
Logger().WithContext(gssapi.NewSecurityContext(context.TODO()))
if err := goexec.ExecuteCleanMethod(ctx, &tschChange, &exec); err != nil {
log.Fatal().Err(err).Msg("Operation failed")
}
},
}
)
|