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https://github.com/nytrorst/netripper
NetRipper - Smart traffic sniffing for penetration testers
https://github.com/nytrorst/netripper
Last synced: 25 days ago
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NetRipper - Smart traffic sniffing for penetration testers
- Host: GitHub
- URL: https://github.com/nytrorst/netripper
- Owner: NytroRST
- License: gpl-3.0
- Created: 2015-07-14T20:31:04.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2022-06-17T21:08:54.000Z (over 2 years ago)
- Last Synced: 2024-10-14T21:20:59.758Z (25 days ago)
- Language: PowerShell
- Homepage:
- Size: 21.8 MB
- Stars: 1,348
- Watchers: 114
- Forks: 317
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- Changelog: Changelog.md
- License: LICENSE.TXT
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README
# Description
NetRipper is a post exploitation tool targeting Windows systems which uses API hooking in order to intercept network traffic and encryption related functions from a low privileged user, being able to capture both plain-text traffic and encrypted traffic before encryption/after decryption.
NetRipper was released at Defcon 23, Las Vegas, Nevada.
# Legal disclaimer
Usage of NetRipper for attacking targets without prior mutual consent is illegal. It is the end user's responsability to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program!
# Abstract
The post-exploitation activities in a penetration test can be challenging if the tester has low-privileges on a fully patched, well configured Windows machine. This work presents a technique for helping the tester to find useful information by sniffing network traffic of the applications on the compromised machine, despite his low-privileged rights. Furthermore, the encrypted traffic is also captured before being sent to the encryption layer, thus all traffic (clear-text and encrypted) can be sniffed. The implementation of this technique is a tool called NetRipper which uses API hooking to do the actions mentioned above and which has been especially designed to be used in penetration tests, but the concept can also be used to monitor network traffic of employees or to analyze a malicious application.
# Tested applications
NetRipper should be able to capture network traffic from: Putty, WinSCP, SQL Server Management Studio, Microsoft Outlook, Google Chrome, Mozilla Firefox and multiple other tools. The list is not limited to these applications but other tools may require special support.
# Components
```
NetRipper.exe - Configures and inject the DLL
DLL.dll - Injected DLL, hook APIs and save data to files
netripper.rb - Metasploit post-exploitation module
```
# Binaries
An automatic build on AppVeyor is available. Binaries can be downloaded from the Artifacts section [here](https://ci.appveyor.com/project/NytroRST/netripper/build/artifacts).
# Command line
```
Injection: NetRipper.exe DLLpath.dll processname.exe
Example: NetRipper.exe DLL.dll firefox.exe
Generate DLL:
-h, --help Print this help message
-w, --write Full path for the DLL to write the configuration data
-l, --location Full path where to save data files (default TEMP)
Plugins:
-p, --plaintext Capture only plain-text data. E.g. true
-d, --datalimit Limit capture size per request. E.g. 4096
-s, --stringfinder Find specific strings. E.g. user,pass,config
Example: NetRipper.exe -w DLL.dll -l TEMP -p true -d 4096 -s user,pass
```
# Metasploit module
```
msf exploit(multi/handler) > use post/windows/gather/netripper/netripper
msf post(windows/gather/netripper/netripper) > show options
Module options (post/windows/gather/netripper/netripper):
Name Current Setting Required Description
---- --------------- -------- -----------
DATALIMIT 65535 no The number of bytes to save from requests/responses
DATAPATH TEMP no Where to save files. E.g. C:\Windows\Temp or TEMP
DLLPATH no Where to find NetRipper DLLs. Default is /usr/share/metasploit-framework...
PLAINTEXT false no True to save only plain-text data
PROCESSIDS no Process IDs. E.g. 1244,1256
PROCESSNAMES no Process names. E.g. firefox.exe,chrome.exe
SESSION yes The session to run this module on.
STRINGFINDER DEFAULT no Search for specific strings in captured data
```
Set PROCESSNAMES or PROCESSIDS and run.
# Metasploit installation (Kali)
1. mkdir /usr/share/metasploit-framework/modules/post/windows/gather/netripper
2. cp Metasploit/netripper.rb /usr/share/metasploit-framework/modules/post/windows/gather/netripper/netripper.rb
3. cp x86/DLL.x86.dll /usr/share/metasploit-framework/modules/post/windows/gather/netripper/DLL.x86.dll
4. cp x64/DLL.x64.dll /usr/share/metasploit-framework/modules/post/windows/gather/netripper/DLL.x64.dll
# Metasploit installation (Backbox)
1. mkdir /opt/metasploit-framework/modules/post/windows/gather/netripper
2. cp Metasploit/netripper.rb /opt/metasploit-framework/modules/post/windows/gather/netripper/netripper.rb
3. cp x86/DLL.x86.dll /opt/metasploit-framework/modules/post/windows/gather/netripper/DLL.x86.dll
4. cp x64/DLL.x64.dll /opt/metasploit-framework/modules/post/windows/gather/netripper/DLL.x64.dll
# PowerShell module
@HarmJ0y Added Invoke-NetRipper.ps1 PowerShell implementation of NetRipper.exe
Please note that the PowerShell module is not up to date.
# Plugins
1. PlainText - Allows to capture only plain-text data
2. DataLimit - Save only first bytes of requests and responses
3. StringFinder - Find specific string in network traffic
# More details
You can find the changelog in the "Changelog.md" file and compilation instructions in the "Compilation.md" file.
NetRipper uses
- Reflective DLL Injection (https://github.com/stephenfewer/ReflectiveDLLInjection) from Stephen Fewer
- minhook library (https://github.com/TsudaKageyu/minhook) from Tsuda Kageyu.
# Author
Ionut Popescu (@NytroRST)