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
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package elevate
import (
"errors"
"runtime"
"strings"
"unsafe"
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/svc/mgr"
)
func DoAsSystem(f func() error) error {
runtime.LockOSThread()
defer func() {
windows.RevertToSelf()
runtime.UnlockOSThread()
}()
privileges := windows.Tokenprivileges{
PrivilegeCount: 1,
Privileges: [1]windows.LUIDAndAttributes{
{
Attributes: windows.SE_PRIVILEGE_ENABLED,
},
},
}
err := windows.LookupPrivilegeValue(nil, windows.StringToUTF16Ptr("SeDebugPrivilege"), &privileges.Privileges[0].Luid)
if err != nil {
return err
}
err = windows.ImpersonateSelf(windows.SecurityImpersonation)
if err != nil {
return err
}
var threadToken windows.Token
err = windows.OpenThreadToken(windows.CurrentThread(), windows.TOKEN_QUERY|windows.TOKEN_ADJUST_PRIVILEGES, false, &threadToken)
if err != nil {
return err
}
tokenUser, err := threadToken.GetTokenUser()
if err == nil && tokenUser.User.Sid.IsWellKnown(windows.WinLocalSystemSid) {
threadToken.Close()
return f()
}
err = windows.AdjustTokenPrivileges(threadToken, false, &privileges, uint32(unsafe.Sizeof(privileges)), nil, nil)
threadToken.Close()
if err != nil {
return err
}
processes, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0)
if err != nil {
return err
}
processEntry := windows.ProcessEntry32{Size: uint32(unsafe.Sizeof(windows.ProcessEntry32{}))}
for err = windows.Process32First(processes, &processEntry); err == nil; err = windows.Process32Next(processes, &processEntry) {
if strings.ToLower(windows.UTF16ToString(processEntry.ExeFile[:])) != "winlogon.exe" {
continue
}
winlogonProcess, err := windows.OpenProcess(windows.PROCESS_QUERY_INFORMATION, false, processEntry.ProcessID)
if err != nil {
continue
}
var winlogonToken windows.Token
err = windows.OpenProcessToken(winlogonProcess, windows.TOKEN_QUERY|windows.TOKEN_IMPERSONATE|windows.TOKEN_DUPLICATE, &winlogonToken)
windows.CloseHandle(winlogonProcess)
if err != nil {
continue
}
tokenUser, err := winlogonToken.GetTokenUser()
if err != nil || !tokenUser.User.Sid.IsWellKnown(windows.WinLocalSystemSid) {
winlogonToken.Close()
continue
}
windows.CloseHandle(processes)
var duplicatedToken windows.Token
err = windows.DuplicateTokenEx(winlogonToken, 0, nil, windows.SecurityImpersonation, windows.TokenImpersonation, &duplicatedToken)
windows.CloseHandle(winlogonProcess)
if err != nil {
return err
}
err = windows.SetThreadToken(nil, duplicatedToken)
duplicatedToken.Close()
if err != nil {
return err
}
return f()
}
windows.CloseHandle(processes)
return errors.New("unable to find winlogon.exe process")
}
func DoAsService(serviceName string, f func() error) error {
scm, err := mgr.Connect()
if err != nil {
return err
}
service, err := scm.OpenService(serviceName)
scm.Disconnect()
if err != nil {
return err
}
status, err := service.Query()
service.Close()
if err != nil {
return err
}
if status.ProcessId == 0 {
return errors.New("service is not running")
}
return DoAsSystem(func() error {
serviceProcess, err := windows.OpenProcess(windows.PROCESS_QUERY_INFORMATION, false, status.ProcessId)
if err != nil {
return err
}
var serviceToken windows.Token
err = windows.OpenProcessToken(serviceProcess, windows.TOKEN_IMPERSONATE|windows.TOKEN_DUPLICATE, &serviceToken)
windows.CloseHandle(serviceProcess)
if err != nil {
return err
}
var duplicatedToken windows.Token
err = windows.DuplicateTokenEx(serviceToken, 0, nil, windows.SecurityImpersonation, windows.TokenImpersonation, &duplicatedToken)
serviceToken.Close()
if err != nil {
return err
}
err = windows.SetThreadToken(nil, duplicatedToken)
duplicatedToken.Close()
if err != nil {
return err
}
return f()
})
}
|
