https://github.com/outflanknl/Dumpert

LSASS memory dumper using direct system calls and API unhooking.
https://github.com/outflanknl/Dumpert

Last synced: 3 months ago
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LSASS memory dumper using direct system calls and API unhooking.

• Host: GitHub
• URL: https://github.com/outflanknl/Dumpert
• Owner: outflanknl
• Created: 2019-06-17T18:22:01.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2021-01-05T08:58:26.000Z (almost 4 years ago)
• Last Synced: 2024-04-12T18:06:31.732Z (7 months ago)
• Language: C
• Homepage:
• Size: 83 KB
• Stars: 1,391
• Watchers: 37
• Forks: 237
• Open Issues: 6
• Metadata Files:
  • Readme: README.md

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• awesome-hacking-lists - outflanknl/Dumpert - LSASS memory dumper using direct system calls and API unhooking. (C)

README

        
### Dumpert, an LSASS memory dumper using direct system calls and API unhooking

Recent malware research shows that there is an increase in malware that is using direct system calls to evade user-mode API hooks used by security products.

This tool demonstrates the use of direct System Calls and API unhooking and combine these techniques in a proof of concept code which can be used to create a LSASS memory dump using Cobalt Strike, 

while not touching disk and evading AV/EDR monitored user-mode API calls.

More info about the used techniques can be found on the following Blog: 

https://outflank.nl/blog/2019/06/19/red-team-tactics-combining-direct-system-calls-and-srdi-to-bypass-av-edr/

Two versions of the code are included:

An executable and a DLL version of the code. 

The DLL version can be run as follows:

```

rundll32.exe C:\Dumpert\Outflank-Dumpert.dll,Dump

```

Also, an sRDI version of the code is provided, including a Cobalt Strike agressor script.

This script uses shinject to inject the sRDI shellcode version of the dumpert DLL into the current process. 

Then it waits a few seconds for the lsass minidump to finish and finally downloads the minidump file from the victim host.

Compile instructions:

```

This project is written in C and assembly.

You can use Visual Studio to compile it from source.

```

The sRDI code can be found here: https://github.com/monoxgas/sRDI