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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() {
registerRpcFlags(tschCmd)
tschDemandCmdInit()
tschCmd.AddCommand(tschDemandCmd)
tschCreateCmdInit()
tschCmd.AddCommand(tschCreateCmd)
}
func tschDemandCmdInit() {
tschDemandCmd.Flags().StringVarP(&tschTask, "task", "t", "", "Name or path of the new task")
tschDemandCmd.Flags().Uint32Var(&tschDemand.SessionId, "session", 0, "Hijack existing session given the session ID")
tschDemandCmd.Flags().BoolVar(&tschDemand.NoDelete, "no-delete", false, "Don't delete task after execution")
tschDemandCmd.Flags().StringVar(&tschDemand.UserSid, "sid", "S-1-5-18", "User SID to impersonate")
registerProcessExecutionArgs(tschDemandCmd)
registerExecutionOutputArgs(tschDemandCmd)
}
func tschCreateCmdInit() {
tschCreateCmd.Flags().StringVarP(&tschTask, "task", "t", "", "Name or path of the new task")
tschCreateCmd.Flags().DurationVar(&tschCreate.StopDelay, "delay-stop", 5*time.Second, "Delay between task execution and termination. This won't stop the spawned process")
tschCreateCmd.Flags().DurationVar(&tschCreate.StartDelay, "start-delay", 5*time.Second, "Delay between task registration and execution")
tschCreateCmd.Flags().DurationVar(&tschCreate.DeleteDelay, "delete-delay", 0*time.Second, "Delay between task termination and deletion")
tschCreateCmd.Flags().BoolVar(&tschCreate.NoDelete, "no-delete", false, "Don't delete task after execution")
tschCreateCmd.Flags().BoolVar(&tschCreate.CallDelete, "call-delete", false, "Directly call SchRpcDelete to delete task")
tschCreateCmd.Flags().StringVar(&tschCreate.UserSid, "sid", "S-1-5-18", "User SID to impersonate")
registerProcessExecutionArgs(tschCreateCmd)
registerExecutionOutputArgs(tschCreateCmd)
}
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 name or path: %q", tschTask)
}
return nil
}
var (
tschDemand tschexec.TschDemand
tschCreate tschexec.TschCreate
tschTask string
tschCmd = &cobra.Command{
Use: "tsch",
Short: "Establish execution via Windows Task Scheduler (MS-TSCH)",
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.
References:
SchRpcRegisterTask - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/849c131a-64e4-46ef-b015-9d4c599c5167
SchRpcRun - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/77f2250d-500a-40ee-be18-c82f7079c4f0
`,
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.
References:
SchRpcRegisterTask - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/849c131a-64e4-46ef-b015-9d4c599c5167
SchRpcRun - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/77f2250d-500a-40ee-be18-c82f7079c4f0
SchRpcDelete - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/360bb9b1-dd2a-4b36-83ee-21f12cb97cff
DeleteExpiredTaskAfter - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/6bfde6fe-440e-4ddd-b4d6-c8fc0bc06fae
`,
Args: args(
argsRpcClient("cifs"),
argsOutput("smb"),
argsTask,
),
Run: func(*cobra.Command, []string) {
tschCreate.Tsch.Client = &rpcClient
tschCreate.IO = exec
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")
}
},
}
)
|