SMB
TCP ports 139, 445
Last updated
TCP ports 139, 445
Last updated
Please note that you have about 10 seconds after you issue the “dir” command to run the “Get- SmbConnection” cmdlet. The SMB client will tear down the connections if there is no activity between the client and the server. It might help to know that you can use the alias “gsmbc” instead of the full cmdlet name.
nbtscan
nbtscan — program for scanning networks for NetBIOS name information
e.g.
nbtscan -r 10.11.1.0/24
enum4linux (a bit out of date - consider using smbmap instead)
a useful tool for extracting information from an SMB null session
Useful for both Windows and Samba systems
the -a flag specifies all simple enumeration
e.g.
enum4linux -a 10.11.1.227
This means that null sessions are allowed..
Nmap Scripts
make use of OS discovery and the various SMB enumeration scripts in particular
to chcek for know SMB protocol vulnerabilities, you can invoke one of the nmap smb-vuln scripts
e.g.
nmap -v -p 139,445 --script=smb-vuln-ms08-067 --script-args=unsafe=1 10.11.1.201
View Shares
smbclient -L //<hostname>
smbclient -L //<hostname> -U%
Connect to Shares
smbclient //<hostname>/<share> -U<username>%<password>
Download everything
smb: \> recurse ON
smb: \> prompt OFF
smb: \> mget *
smbclient -U user2020 '//10.10.10.50/sharename' -c 'prompt OFF;recurse ON;mget *'
smbmap -H <ip address>
lists file shares and permissions
there are also many other uses for the tool
see the help page for more info
smbmap -R <share name> -H <ip address>
recursively list all files in folders in a share located on a specific system
smbmap -R Replication -H 10.10.10.100 -A Groups.xml -q
download a file from the share
*** It does not download the file to the current directory
it's easiest to identify where it is stored by using find or locate
e.g. updatedb; locate Groups.xml
e.g. find / -name *Groups.xml 2>/dev/null
smbmap -d active.htb -u svc_tgs -p GPPstillStandingStrong2k18 -H 10.10.10.100
Metasploit
auxiliary/scanner/smb/smb_version
enumerate smb version
If smbclient is giving you error:
Add the following line under "global" in /etc/samba/smb.conf:
client min protocol = NT1
Enumerate SMB users
python3 /opt/impacket/examples/lookupsid.py <username>:<password>@<ip address or hostname>
root@kali:/opt/impacket/examples# python3 lookupsid.py hazard:stealth1agent@10.10.10.149
Impacket v0.9.22.dev1+20201112.141202.d1ced941 - Copyright 2020 SecureAuth Corporation
[*] Brute forcing SIDs at 10.10.10.149
[*] StringBinding ncacn_np:10.10.10.149[\pipe\lsarpc]
[*] Domain SID is: S-1-5-21-4254423774-1266059056-3197185112
500: SUPPORTDESK\Administrator (SidTypeUser)
501: SUPPORTDESK\Guest (SidTypeUser)
503: SUPPORTDESK\DefaultAccount (SidTypeUser)
504: SUPPORTDESK\WDAGUtilityAccount (SidTypeUser)
513: SUPPORTDESK\None (SidTypeGroup)
1008: SUPPORTDESK\Hazard (SidTypeUser)
1009: SUPPORTDESK\support (SidTypeUser)
1012: SUPPORTDESK\Chase (SidTypeUser)
1013: SUPPORTDESK\Jason (SidTypeUser)
