1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
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("executable", "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("executable", "command")
}
func tschChangeCmdInit() {
tschChangeFlags := newFlagSet("Task Scheduler")
tschChangeFlags.Flags.StringVarP(&tschTask, "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("executable", "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)",
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.
References:
- https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/849c131a-64e4-46ef-b015-9d4c599c5167
- 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
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:`, // TODO
Args: args(
argsRpcClient("cifs"),
argsOutput("smb"),
argsTask,
),
Run: func(*cobra.Command, []string) {
tschChange.Tsch.Client = &rpcClient
tschChange.IO = exec
tschChange.TaskPath = tschTask
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")
}
},
}
)
|