LaZagneForensic - Decrypt Windows Credentials From Another Host

LaZagne uses an internal Windows API called CryptUnprotectData to decrypt user passwords. This API should be called on the victim user session, otherwise, it does not work. If the computer has not been started (when the analysis is realized on an offline mounted disk), or if we do not want to drop a binary on the remote host, no passwords can be retrieved.

LaZagneForensic has been created to avoid this problem. This work has been mainly inspired by the awesome work done by Jean-Michel Picod for DPAPICK and Francesco Picasso for Windows DPAPI laboratory.

Note: The main problem is that to decrypt these passwords, the user Windows passwords is needed.

Installation

pip install -r requirements.txt

Usage

First way - Dump configuration files from the remote host

Using the powershell script

PS C:\Users\test\Desktop> Import-Module .\dump.ps1
PS C:\Users\test\Desktop> Dump
Folder dump created successfully !

Using the python script

python dump.py

Launch Lazagne with password if you have it

python laZagneForensic.py all -remote /tmp/dump -password 'ZapataVive'

Launch Lazagne without password

python laZagneForensic.py all -remote /tmp/dump

Second way - Mount a disk on your filesystem

The file should be mounted on your filesystem

test:~$ ls /tmp/disk/
total 769M
drwxr-xr-x 2 root root    0 févr.  1 14:05 ProgramData
-rwxr-xr-x 1 root root 256M févr.  1 14:05 swapfile.sys
-rwxr-xr-x 1 root root 512M févr.  1 14:05 pagefile.sys
drwxr-xr-x 2 root root    0 janv. 31 00:35 System Volume Information
dr-xr-xr-x 2 root root    0 janv. 26 10:17 Program Files (x86)
dr-xr-xr-x 2 root root    0 janv. 25 18:13 Program Files
drwxr-xr-x 2 root root    0 janv. 19 10:09 Windows
drwxr-xr-x 2 root root    0 janv. 16 15:52 Homeware
drwxr-xr-x 2 root root    0 janv.  9 17:33 PerfLogs
drwxr-xr-x 2 root root    0 nov.  22 20:37 Recovery
drwxr-xr-x 2 root root 4,0K nov.  22 20:31 Documents and Settings
dr-xr-xr-x 2 root root    0 nov.  22 20:31 Users

Launch Lazagne with password if you have it

python laZagneForensic.py all -local /tmp/disk -password 'ZapataVive'

Launch Lazagne without password

python laZagneForensic.py all -local /tmp/disk

Note: Use -v for verbose mode and -vv for debug mode.

Supported software
Note: Check the following image to understand which passwords you could decrypt without needed the user windows password. All credentials found will be tested as Windows password in case of the user re-uses the same password.