MimiPenguin 2.0

A tool to dump the login password from the current linux desktop user. Adapted from the idea behind the popular Windows tool mimikatz.

Details

Takes advantage of cleartext credentials in memory by dumping the process and extracting lines that have a high probability of containing cleartext passwords. Will attempt to calculate each word's probability by checking hashes in /etc/shadow, hashes in memory, and regex searches. 2.0 introduces a clean C port that aims to increase the speed of execution and portability

Known Issues

The 32bit variant of mimipenguin (C build) may fail in a 64bit userspace as it currently does not adequatley handle searching a 64bit address space

Requires

root permissions

Supported/Tested Systems

Kali 4.3.0 (rolling) x64 (gdm3)
Ubuntu Desktop 12.04 LTS x64 (Gnome Keyring 3.18.3-0ubuntu2)
Ubuntu Desktop 14.04.1 LTS x64 (Gnome Keyring 3.10.1-1ubuntu4.3, LightDM 1.10.6-0ubuntu1)
Ubuntu Desktop 16.04 LTS x64 (Gnome Keyring 3.18.3-0ubuntu2)
Ubuntu Desktop 16.04.4 LTS x64 (Gnome Keyring 3.18.3-0ubuntu2, LightDM 1.18.3-0ubuntu1.1)
Ubuntu 18
XUbuntu Desktop 16.04 x64 (Gnome Keyring 3.18.3-0ubuntu2)
Archlinux x64 Gnome 3 (Gnome Keyring 3.20)
OpenSUSE Leap 42.2 x64 (Gnome Keyring 3.20)
VSFTPd 3.0.3-8+b1 (Active FTP client connections)
Apache2 2.4.25-3 (Active/Old HTTP BASIC AUTH Sessions) [Gcore dependency]
openssh-server 1:7.3p1-1 (Active SSH connections - sudo usage)

Building

To Build the C variant release simply run make in the root directory of the project
To build a debug binary with debug prints run make debug
To build a static linked binaries run make static

Notes

Password moves in memory - still honing in on 100% effectiveness
Plan on expanding support and other credential locations
Working on expanding to non-desktop environments
Known bug - sometimes gcore hangs the script, this is a problem with gcore
Open to pull requests and community research
LDAP research (nscld winbind etc) planned for future

Development Roadmap

Implement needles in C port (speed up)
Add optional arg to target specific users only (speed up)

MimiPenguin is slowly being ported to multiple languages to support all possible post-exploit scenarios. The roadmap below was suggested by KINGSABRI to track the various versions and features. An "X" denotes full support while a "~" denotes a feature with known bugs.

Feature	.sh	.py
GDM password (Kali Desktop, Debian Desktop)	~	X
Gnome Keyring (Ubuntu Desktop, ArchLinux Desktop)	~	X
LightDM (Ubuntu Desktop)	X	X
VSFTPd (Active FTP Connections)	X	X
Apache2 (Active HTTP Basic Auth Sessions)	~	~
OpenSSH (Active SSH Sessions - Sudo Usage)	~	~

Contact

Twitter: @huntergregal
Website: huntergregal.com
Github: huntergregal

Licence

CC BY 4.0 licence - https://creativecommons.org/licenses/by/4.0/

Special Thanks

the-useless-one for remove Gcore as a dependency, cleaning up tabs, adding output option, and a full python3 port
gentilkiwi for Mimikatz, the inspiration and the twitter shoutout
pugilist for cleaning up PID extraction and testing
ianmiell for cleaning up some of my messy code
w0rm for identifying printf error when special chars are involved
benichmt1 for identifying multiple authenticate users issue
ChaitanyaHaritash for identifying special char edge case issues
ImAWizardLizard for cleaning up the pattern matches with a for loop
coreb1t for python3 checks, arch support, other fixes
n1nj4sec for a python2 port and support
KINGSABRI for the Roadmap proposal
bourgouinadrien for linking https://github.com/koalaman/shellcheck
bcoles for adding more needles and work on a metasploit module ruby port

shushen1998 / mimipenguin