Krbrelayx - Toolkit per il relaying Kerberos e l'abuso della delega non vincolata

Toolkit per abusare di Kerberos. Richiede impacket, ldap3 e dnspython per funzionare. Si consiglia di installare impacket direttamente da git per avere l'ultima versione disponibile.

Maggiori informazioni su questo toolkit sono disponibili nel mio blog https://dirkjanm.io/krbrelayx-unconstrained-delegation-abuse-toolkit/. Informazioni sul relaying Kerberos nel blog successivo https://dirkjanm.io/relaying-kerberos-over-dns-with-krbrelayx-and-mitm6/.

Strumenti inclusi

addspn.py

Questo strumento può aggiungere/rimuovere/modificare i Service Principal Name (SPN) sugli account in AD tramite LDAP.

usage: addspn.py [-h] [-u USERNAME] [-p PASSWORD] [-t TARGET] -s SPN [-r] [-q]
                 [-a]
                 HOSTNAME

Add an SPN to a user/computer account

Required options:
  HOSTNAME              Hostname/ip or ldap://host:port connection string to
                        connect to

Main options:
  -h, --help            show this help message and exit
  -u USERNAME, --user USERNAME
                        DOMAIN\username for authentication
  -p PASSWORD, --password PASSWORD
                        Password or LM:NTLM hash, will prompt if not specified
  -t TARGET, --target TARGET
                        Computername or username to target (FQDN or COMPUTER$
                        name, if unspecified user with -u is target)
  -s SPN, --spn SPN     servicePrincipalName to add (for example:
                        http/host.domain.local or cifs/host.domain.local)
  -r, --remove          Remove the SPN instead of add it
  -q, --query           Show the current target SPNs instead of modifying
                        anything
  -a, --additional      Add the SPN via the msDS-AdditionalDnsHostName
                        attribute

dnstool.py

Aggiungi/modifica/elimina record DNS integrati in Active Directory tramite LDAP.

usage: dnstool.py [-h] [-u USERNAME] [-p PASSWORD] [--forest] [--legacy] [--zone ZONE]
                  [--print-zones] [--tcp] [-k] [-dc-ip ip address] [-dns-ip ip address]
                  [-aesKey hex key] [-r TARGETRECORD]
                  [-a {add,modify,query,remove,resurrect,ldapdelete}] [-t {A}] [-d RECORDDATA]
                  [--allow-multiple] [--ttl TTL]
                  HOSTNAME

Query/modify DNS records for Active Directory integrated DNS via LDAP

Required options:
  HOSTNAME              Hostname/ip or ldap://host:port connection string to
                        connect to

Main options:
  -h, --help            show this help message and exit
  -u USERNAME, --user USERNAME
                        DOMAIN\username for authentication.
  -p PASSWORD, --password PASSWORD
                        Password or LM:NTLM hash, will prompt if not specified
  --forest              Search the ForestDnsZones instead of DomainDnsZones
  --zone ZONE           Zone to search in (if different than the current
                        domain)
  --print-zones         Only query all zones on the DNS server, no other
                        modifications are made

Record options:
  -r TARGETRECORD, --record TARGETRECORD
                        Record to target (FQDN)
  -a {add,modify,query,remove,ldapdelete}, --action {add,modify,query,remove,ldapdelete}
                        Action to perform. Options: add (add a new record),
                        modify (modify an existing record), query (show
                        existing), remove (mark record for cleanup from DNS
                        cache), delete (delete from LDAP). Default: query
  -t {A}, --type {A}    Record type to add (Currently only A records
                        supported)
  -d RECORDDATA, --data RECORDDATA
                        Record data (IP address)
  --allow-multiple      Allow multiple A records for the same name
  --ttl TTL             TTL for record (default: 180)

printerbug.py

Semplice strumento per attivare il bug del servizio Spooler tramite backconnect RPC. Simile a dementor.py. Grazie a @agsolino per aver implementato queste chiamate RPC.

usage: printerbug.py [-h] [-target-file file] [-port [destination port]]
                     [-hashes LMHASH:NTHASH] [-no-pass]
                     target attackerhost

positional arguments:
  target                [[domain/]username[:password]@]<targetName or address>
  attackerhost          hostname to connect to

optional arguments:
  -h, --help            show this help message and exit

connection:
  -target-file file     Use the targets in the specified file instead of the
                        one on the command line (you must still specify
                        something as target name)
  -port [destination port]
                        Destination port to connect to SMB Server

authentication:
  -hashes LMHASH:NTHASH
                        NTLM hashes, format is LMHASH:NTHASH
  -no-pass              don't ask for password (useful when proxying through
                        ntlmrelayx)
  -k                    Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on target parameters.
                        If valid credentials cannot be found, it will use the ones specified in the command line
  -dc-ip ip address     IP Address of the domain controller. If omitted it will use the domain part (FQDN) specified in the target
                        parameter
  -target-ip ip address
                        IP Address of the target machine. If omitted it will use whatever was specified as target. This is useful
                        when target is the NetBIOS name or Kerberos name and you cannot resolve it

krbrelayx.py

Questo strumento ha molteplici opzioni di utilizzo:

• Relaying Kerberos: Quando non vengono fornite credenziali, ma è specificato almeno un target, krbrelayx inoltrerà l'autenticazione Kerberos a un hostname di destinazione corrispondente, effettuando di fatto il relaying dell'autenticazione. Ottenere autenticazione Kerberos in arrivo con un SPN valido dipende da te, ma puoi usare mitm6 per questo scopo.
• Abuso della delega non vincolata: In questa modalità, krbrelayx decripterà e scaricherà i TGT in arrivo incorporati nell'autenticazione con delega non vincolata, oppure utilizzerà immediatamente i TGT per autenticarsi a un servizio target. Ciò richiede che siano specificate le credenziali di un account con delega non vincolata.

usage: krbrelayx.py [-h] [-debug] [-t TARGET] [-tf TARGETSFILE] [-w] [-ip INTERFACE_IP] [-r SMBSERVER] [-l LOOTDIR]
                    [-f {ccache,kirbi}] [-codec CODEC] [-no-smb2support] [-wh WPAD_HOST] [-wa WPAD_AUTH_NUM] [-6] [-p PASSWORD]
                    [-hp HEXPASSWORD] [-s USERNAME] [-hashes LMHASH:NTHASH] [-aesKey hex key] [-dc-ip ip address] [-e FILE]
                    [-c COMMAND] [--enum-local-admins] [--no-dump] [--no-da] [--no-acl] [--no-validate-privs]
                    [--escalate-user ESCALATE_USER] [--add-computer] [--delegate-access] [--adcs] [--template TEMPLATE]
                    [-v TARGET]

Kerberos relay and unconstrained delegation abuse tool. By @_dirkjan / dirkjanm.io