mirror of
https://github.com/AbdullahRizwan101/CTF-Writeups
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202 lines
10 KiB
Markdown
202 lines
10 KiB
Markdown
# TryHackMe-Tony The Tiger
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## NMAP
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```
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Starting Nmap 7.80 ( https://nmap.org ) at 2020-11-14 20:08 PKT
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Nmap scan report for 10.10.127.87
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Host is up (0.15s latency).
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Not shown: 989 closed ports
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PORT STATE SERVICE VERSION
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22/tcp open ssh OpenSSH 6.6.1p1 Ubuntu 2ubuntu2.13 (Ubuntu Linux; protocol 2.0)
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| ssh-hostkey:
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| 1024 d6:97:8c:b9:74:d0:f3:9e:fe:f3:a5:ea:f8:a9:b5:7a (DSA)
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| 2048 33:a4:7b:91:38:58:50:30:89:2d:e4:57:bb:07:bb:2f (RSA)
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| 256 21:01:8b:37:f5:1e:2b:c5:57:f1:b0:42:b7:32:ab:ea (ECDSA)
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|_ 256 f6:36:07:3c:3b:3d:71:30:c4:cd:2a:13:00:b5:25:ae (ED25519)
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80/tcp open http Apache httpd 2.4.7 ((Ubuntu))
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|_http-generator: Hugo 0.66.0
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|_http-server-header: Apache/2.4.7 (Ubuntu)
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|_http-title: Tony's Blog
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1090/tcp open java-rmi Java RMI
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|_rmi-dumpregistry: ERROR: Script execution failed (use -d to debug)
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1091/tcp open java-rmi Java RMI
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1098/tcp open java-rmi Java RMI
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1099/tcp open java-object Java Object Serialization
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| fingerprint-strings:
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| NULL:
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| java.rmi.MarshalledObject|
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| hash[
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| locBytest
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| objBytesq
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| xpCCB
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| xpCCB
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| #http://thm-java-deserial.home:8083/q
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| org.jnp.server.NamingServer_Stub
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| java.rmi.server.RemoteStub
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| java.rmi.server.RemoteObject
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| xpwA
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| UnicastRef2
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|_ thm-java-deserial.home
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4446/tcp open java-object Java Object Serialization
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5500/tcp open hotline?
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| fingerprint-strings:
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| DNSStatusRequestTCP:
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| GSSAPI
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| NTLM
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| CRAM-MD5
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| DIGEST-MD5
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| thm-java-deserial
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| DNSVersionBindReqTCP, GenericLines, NULL:
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| CRAM-MD5
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| GSSAPI
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| NTLM
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| DIGEST-MD5
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| thm-java-deserial
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| GetRequest:
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| DIGEST-MD5
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| CRAM-MD5
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| GSSAPI
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| NTLM
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| thm-java-deserial
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| HTTPOptions:
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| DIGEST-MD5
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| GSSAPI
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| CRAM-MD5
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| NTLM
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| thm-java-deserial
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| Help:
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| NTLM
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| GSSAPI
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| DIGEST-MD5
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| CRAM-MD5
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| thm-java-deserial
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| Kerberos:
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| CRAM-MD5
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| DIGEST-MD5
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| GSSAPI
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| NTLM
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| thm-java-deserial
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| RPCCheck:
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| NTLM
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| DIGEST-MD5
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| CRAM-MD5
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| GSSAPI
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| thm-java-deserial
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| RTSPRequest:
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| GSSAPI
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| NTLM
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| DIGEST-MD5
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| CRAM-MD5
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| thm-java-deserial
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| SSLSessionReq:
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| GSSAPI
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| DIGEST-MD5
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| NTLM
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| CRAM-MD5
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| thm-java-deserial
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| TLSSessionReq:
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| GSSAPI
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| DIGEST-MD5
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| NTLM
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| thm-java-deserial
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| TerminalServerCookie:
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| DIGEST-MD5
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| CRAM-MD5
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| NTLM
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| GSSAPI
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|_ thm-java-deserial
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8009/tcp open ajp13 Apache Jserv (Protocol v1.3)
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| ajp-methods:
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| Supported methods: GET HEAD POST PUT DELETE TRACE OPTIONS
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| Potentially risky methods: PUT DELETE TRACE
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|_ See https://nmap.org/nsedoc/scripts/ajp-methods.html
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8080/tcp open http Apache Tomcat/Coyote JSP engine 1.1
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| http-methods:
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|_ Potentially risky methods: PUT DELETE TRACE
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|_http-open-proxy: Proxy might be redirecting requests
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|_http-server-header: Apache-Coyote/1.1
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|_http-title: Welcome to JBoss AS
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8083/tcp open http JBoss service httpd
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|_http-title: Site doesn't have a title (text/html).
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```
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## PORT 80
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<img src="https://imgur.com/TV4u49m.png"/>
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We see an image so let's see if there is any stegongraphy involved in this
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<img src="https://imgur.com/r7q42WH.png"/>
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I tried to run `steghide` to extract something from the image but failed as there is something wrong with the bytes in the image
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<img src="https://imgur.com/NeZlGLN.png"/>
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Run `strings` on the image
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<img src="https://imgur.com/7IUwqil.png"/>
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Now download `jboss.zip` which is provided in the room
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## PORT 8080
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<img src="https://imgur.com/8HOa5VJ.png"/>
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There is an `administrative console` and try to login with default credentials which are `admin`:`admin`
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<img src="https://imgur.com/0JLEwU4.png"/>
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<img src="https://imgur.com/ZAXM7JP.png"/>
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<img src="https://imgur.com/hWrXG53.png"/>
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Now search for the `jboss` exploit and on the github page you'll find it
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<img src="https://imgur.com/eVgsIfx.png"/>
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Run it like it does in the picture
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<img src="https://imgur.com/8rS5aAp.png"/>
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<img src="https://imgur.com/0MpKvKB.png"/>
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Looking in `jboss` directory we'll find a password
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<img src="https://imgur.com/a5ydOew.png"/>
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## Privilege Escalation
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<img src="https://imgur.com/2ADqgUL.png"/>
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We can see that we can run `find` as `sudo` so we can run find to execute a command to add `jboss` in sudoers
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`jboss@thm-java-deserial:~$ sudo /usr/bin/find . -exec usermod -aG jboss \;`
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```
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jboss@thm-java-deserial:~$ sudo -l
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Matching Defaults entries for jboss on thm-java-deserial:
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env_reset, mail_badpass,
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secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin
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User jboss may run the following commands on thm-java-deserial:
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(ALL) NOPASSWD: /usr/bin/find
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(ALL : ALL) ALL
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jboss@thm-java-deserial:~$ sudo bash
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[sudo] password for jboss:
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root@thm-java-deserial:~#
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```
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To get the root flag , it is in `base64` encoded
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<img src="https://imgur.com/VRkOsqs.png"/>
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Now let's use `hashcat` it is in `md5 raw` so we can crack it
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<img src="https://imgur.com/sCt8jzN.png"/>
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<img src="https://imgur.com/78s7kFU.png"/>
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