smbclient execute command

When toggled ON, these commands will process all directories in the source directory (i.e., the directory they are copying from ) and will recurse into any that match the mask specified to the command. smbclient IP address for “CISO Underrepresented” w/ Mark Arnold and Steph Ihezukwu from June 30. google_ad_client = "pub-7133395778201029"; This option allows you to override the NetBIOS name that Samba uses for itself. During a penetration test (pentest), it is natural to investigate FTP services within a network that allow anonymous access. Create a tar file of the files beneath for all files) recurse: toggles recursion on (default: off) prompt: toggles prompting for filenames off (default: on) mget: copies all files matching the mask from host to client machine (Information from the manpage of smbclient) Read Registry Probably only of any use with the tar -T option. smbclient - ftp-like client to access SMB/CIFS resources on servers Synopsis. This command depends on the server supporting the CIFS UNIX extensions and will fail if the server does not. Because of this, I decided to put together a quick tutorial for my students. Note: Some servers (including OS/2 and Windows for Workgroups) insist on an uppercase password. Note there is currently no way to remotely look up the UNIX uid and gid values for a given name. parameter in the smbclient may be used to create In Figure 3, we attempt again to connect anonymously, again using smbclient. Because I need to execute in batch this copy, I have to use -c 'mput foo-*', how can I avoid the request of 'y' that I receive from the prompt of smbclient? %h – Server host name. When recursion is toggled OFF, only files from the current working directory on the source machine that match the mask specified to the mget or mput commands will be copied, and any mask specified using the mask command will be ignored. If no command is specified, a local shell will be run. -N Sets the archive level when operating on files. be setuid or setgid! Blocksize. from the machine running the client to the server. If you want to copy /data/directory on Linux so that a copy of it will appear as \\192.168.1.1\share\directory on Windows, then perhaps this command should do the job:. It seems pertinent during this time of year, as I finish off the last batch of left over Christmas... You made it to part 4! A tool often cited in tutorials regarding smb exploitation is Metasploit (which we will use next), and the smb_login module. -N However, the full path name of the file must be less than 1024 bytes. print Note that all transfers in A list of the files matching Incoming TCP connections allowed on port 445. By Jeff Georgeson Your organization will get compromised! Set to OFF by default (tells file server to treat filenames as case insensitive). del %I – IP address of the client system. google_ad_channel ="9030538898"; After we run the module, we are no further along than we were before running it. In fact, sharing a single file makes it easier to maintain revisions than copying a file back and forth between an FTP server. [command] This is useful when accessing a service that does not require a password. or Prints the current volume name of the share. in the current working directory on the server will be retrieved from the server and displayed. The standard (well-known) TCP port number for an SMB/CIFS server is 139, which is the default. Also, on many systems the command line of a running process may be seen via the Note that all transfers in dir Try to authenticate with kerberos. du From here we can navigate around using similar commands as those found in FTP applications. -E|--stderr smbclient Note that Sets the SMB username or username and password. There are no upcoming events at this time. You are more likely to run out of storage space, so this should be your primary consideration when choosing your server size. If no command is specified, a local shell will be run. are binary. This is not a complete list, check the Samba source code for the complete list. Used for internal Samba testing purposes. The secondary tar flags that can be given to this option are : smbclient's tar option now supports long file names both on backup and restore. This is often useful when copying (say) MSDOS files from a server, because lowercase filenames are the norm on UNIX systems. Note that the value for mask defaults to blank (equivalent to "*") and remains so until the mask command is used to change it. md Used for internal Samba testing purposes. In incremental mode, tar will only back up files with the archive bit set. NetBIOS scopes are I downloaded the git as per the intruction and i go to the containing folder and it tell me that the command cannot be found . smb.conf Toggle lowercasing of filenames for the get and mget commands. Thus the behavior may vary from server to server, depending on how the server was implemented. command. However, due to bash shell restrictions, you will need to escape the backslashes, so you end up with a command such as this: smbclient \\\\172.16.27.132\\C$ -U administrator. This command allows the user to set up a mask which will be used during recursive operation of the mget and mput commands. mask If specified, this parameter suppresses the normal password prompt from the client to the user. If the receiving computer is running WinPopup the user will receive the message and probably a beep. This may be addressed in future versions of the CIFS UNIX extensions. Command and parameters are space-delimited unless these notes specifically state otherwise. PHP executes as the web user on the system (generally www for Apache), so you need to make sure that the web user has rights to whatever files or directories that you are trying to use in the shell_exec command. -i|--scope It is often necessary to use the -n option when connecting to some types of servers. Nmap discovered NetBioS, the computer name (HACKINGDOJO-01), and the name of the workgroup in which the system is assigned (WORKGROUP). SJIS blocksize*TBLOCK (usually 512 byte) blocks. local file name. 3. Hi. In Figure 1, we see the results of an Nmap scan against a target within the Dojo’s lab. \m[blue]netbios name\m[] Request that the connection be encrypted. Once on the host server (the Windows machine), try putting your /etc/hosts file: While that is certainly convenient for the employees, it is obviously quite devastating for the organization’s security posture. Please refer to the Ubuntu 16.04 initial server setupguide for more information. The When tar command executes, it hit the checkpoint and execute the given command. and is the NetBIOS name of the SMB/CIFS server offering the desired service and -c|--comand command string If the -U switch is not used, the username of the current user is passed to the Samba server. servicename is the name of the service you want to use on the server. So your task is to study each and every option of the tools we tried in this tutorial. parameter above. INCOMPLETE SECTION OR ARTICLE. -d|--debuglevel=level This command depends on the server supporting the CIFS UNIX extensions and will fail if the server does not. If not supplied, it will be determined automatically by the client as described above. The original Samba man pages were written by Karl Auer. We now have additional information that we could use to expand our attack against other systems in the network / domain. for “Bad As You Want To Be – Adversary Emulation Basics” w/ Jake Williams from May 28. The conversion to DocBook XML 4.2 for Samba 3.0 was done by Alexander Bokovoy. In reset mode, tar will reset the archive bit on all files it backs up (implies read/write share). smbclient is an integer from 0 to 10. logon smbclient //mypc/myshare "" -N -Tc backup.tar * -D|--directory initial directory. Once the client is running, the user is presented with a prompt : The backslash ("\\") indicates the current working directory on the server, and will change if the current working directory is changed. ftp(1)). posix_encrypt rd posix_mkdir So the next module we will look at is smb_enumusers_domain. Establishes a new vuid for this session by logging on again. Operations include things like getting files from the server to the local machine, putting files from the local machine to the server, … This functionality is primarily intended as a development aid, and works best when using a LMHOSTS file. For example OS/2 LanManager insists on a valid NetBIOS name being used, so you need to supply a valid name that would be known to the server. The log file name is specified at compile time, but may be overridden on the command line. Using g (incremental) and N (newer) will affect tarmode settings. for a description of how to handle incoming WinPopup messages in Samba. Lowercase or mixed case passwords may be rejected by these servers. Deletes a remote directory using the CIFS UNIX extensions. LOGNAME The message is also automatically truncated if the message is over 1600 bytes, as this is the limit of the protocol. It could be possible that “wilhelm” had a password that we could attempt to brute force, which smb_client would be capable of performing as well. Aug – Video & Deck Available Now! The masks specified to the mget and mput commands act as filters for directories rather than files when recursion is toggled ON. -k|--kerberos \m[blue]log level\m[] Tries to unlock a POSIX fcntl lock on the given range. rpcclientis a utility initially developed to test MS-RPC functionality in Samba itself. This specifies a NetBIOS scope that Smbclient. parameter in the /usr/bin/smbclient -L host where 'host' is the name of the machine that you wish to view. Create a tar file of all the files and directories in the share. My initial response was to tell the student that it was similar to FTP, and they should conduct the same type of enumeration against SMB as they do anything else open on the system. Print a summary of command line options. There is a lot that can be done against a system with shares within a pentest. The default is 0. blocksize -e Some servers are fussy about the case of supplied usernames, passwords, share names (AKA service names) and machine names. for “TryHackMe – Behind the Curtain” w/ Ben Spring and Ashu Savani from Aug 27. Since there might be some additional confusion in the general populace of the security community, I thought getting it published on The Ethical Hacker Network would be beneficial. name resolve order Displays the print queue, showing the job id, name, size and current status. Opens a remote file using the CIFS UNIX extensions and prints a fileid. Also, when a tar archive is created, It then dawned on me that, since I came from a Solaris background, I had a different experience. Just like the FTP application, there is a tool that makes it easy to connect remotely to file shares on other systems – smbclient. is interpreted differently during recursive operation and non-recursive operation - refer to the recurse and mask commands for more information. altname file In a world where security awareness is rapidly increasing and your grandmother even has a secure wireless access point, one might imagine that admins without command line experience and open, anonymous SMB shares are a thing of the past… think again! is specified, the current working directory on the local machine will be changed to the directory specified. If you do not, then something is incorrectly configured. Command Injection occurs due to insufficient input validation to the application. smbclient supports long file names where the server supports the LANMAN2 protocol or above. google_color_border="ffffff"; I also want to point out that there is a lot of functionality and restrictions / circumstances that would impact a pentester using these tools, and it is imperative for students to understand each flag / option / limitations of each tool or module they use. The information in this file includes server-specific information such as what printcap file to use, as well as descriptions of all the services that the server is to provide. However, if systems in a network are configured with anonymous shares, what we covered is pretty much all you need to know. Parameters to commands may or may not be case sensitive, depending on the command. TCP socket options to set on the client socket. compatible backups of all the files on an SMB/CIFS share. I would simply map the drives at the command line as a system / network administrator. If these environmental variables are not found, the username google_color_link="900b09"; There is a lot that can be done against a system with shares within a pentest. allinfo file Note that the driver files should already exist in the directory returned by getdriverdir. queue By Thomas Wilhelm In this case (and for issues of brevity) we will target the “SharedDocs” share. -T|--tar tar options mput It is possible that sensitive data is unintentionally placed on an FTP server by non-IT employees (for the sake of convenience) without knowing who else can access the material. google_color_text="000000"; – EH-Net Live! This includes user enumeration. Thus to connect to the service "printer" on the SMB/CIFS server "smbserver", you would use the servicename – EH-Net Live! is used. ".progname" Thurs Oct 29 @ 1:00 PM US ET. Samba is an open-source implementation of the Server Message Block (SMB) protocol. recurse This parameter sets the maximum protocol version announced by the client. Print the specified file from the local machine through a printable service on the server. This man page is correct for version 3.2 of the Samba suite. The linkname file must not exist. The client requests that the server create a symbolic hard link between the target and linkname files. If no command is specified, a list of available commands will be displayed. easy parseable output that allows processing with utilities such as grep and cut. Since this tutorial is for new students learning pentesting, I will begin our fun with SMB with enumeration and discuss some issues along the way. tar(1) We now have additional information that we could use to expand our attack against other systems in the network / domain. ... smbclient.py [domain]/[user]:[password/password hash]@[Target IP Address] Command: may contain the path, executed with system(), which the client should connect to instead of connecting to a server. If %password is not specified, the user will be prompted. This option is used by the programs in the Samba suite to determine what naming services and in what order to resolve host names to IP addresses. smb.conf There is no default password. -L|--list Closes a file explicitly opened by the open command. Levels above 3 are designed for use only by developers and generate HUGE amounts of log data, most of which is extremely cryptic. tarlist. If you wish to browse the contents of your home directory, replace sharename with your username. What I would like to do is also know of any additional users on this system. blocksize Execute commands remotely psexec. -c 'print -'. close Expected results: 1. Prints the program version number. How to Mount smbfs (SAMBA file system) permanently in Linux.In this post I am going to give some examples how to do SMB (Server Message Block) mounts.. Type1 : Listing SMB shared folder through command prompt #smbclient –L ipadd –U username Here –L will specify listing of SMB share for the server with ipadd […] -t terminal code posix Pa… Fetch a remote file and view it with the contents of your PAGER environment variable. password Possible values for arch are the same as those for the getdriverdir command. The mask specified with the mask command is necessary to filter files within those directories. See the Only currently affects Samba 3.0.5 and above file servers with the case sensitive parameter set to auto in the smb.conf. See also the lowercase command. command will display a brief informative message about the specified command. -I * Note: due to limitations in smbclient, if the remote filename specifies a path, * we can't do this in one command; instead, we need to break it into a cd and then a del. This option allows you to specify a file from which to read the username and password used in the connection. So the first thing we want to do is find a system that has SMB running. nmblookup Enjoy! service -c. This is particularly useful in scripts and for printing stdin to the server, e.g. Parameters shown in angle brackets (e.g., "") are required. Remove the specified directory (user access privileges permitting) from the server. In full mode, tar will back up everything regardless of the archive bit setting (this is the default mode). smb.conf Requires the server support the UNIX extensions. This tool is part of thesamba(7)suite. posix_rmdir This option has not been seriously tested and may have some problems. If we return to the smb_login module and set the username (SMBUser) to “Wilhelm,” we come up with some different results as seen in Figure 6. -R|--name-resolve are binary. very Samba shares Linux files and printers with Windows systems, and also gives Linux users access to files on Windows systems. It offers an interface similar to that of the FTP program. Once we connect to the remote system with our query, the remote system responds with a list of sharenames. Replaces the current vuid. Query the remote server to see if it supports the CIFS UNIX extensions and prints out the list of capabilities supported. June – Video & Deck Available Now! map – The value of this property is a command to execute when the client connects to the share. I have massage “smbclient” is not installed. option is not specified, the client will prompt for a password, even if the desired service does not require one. Change to initial directory before starting. smbd(8) The log file is never removed by the client. USER link target linkname echo message command You use it as -I|--ip-address IP-address Used for internal Samba testing purposes. ps However, if systems in a network are configured with anonymous shares, what we covered is pretty much all you need to know. Interview: Ilia Kolochenko, CEO of High-Tech Bridge, Wireless Pentesting Part 4 – Performing an Actual Wireless Pentest, Wireless Pentesting Part 3 – Common Wireless Attacks, Course Review: SANS SEC 569 Combating Malware in the Enterprise, Wireless Pentesting Part 2 – Building a WiFi Hacking Rig, Course Review: Dark Side Ops – Custom Penetration Testing, Ease Me Into Cryptography Part 4: TLS – Applied Cryptographic Foundations, Course Review: Offensive Security AWE (Advanced Windows Exploitation), https://www.youtube.com/watch?v=KTFTfxGH2hE. If you are using the UFW firewall, please refer to How To Set U… If for more information. command line option above. Each command is a single word, optionally followed by parameters specific to that command. smb.conf This overrides the default domain which is the domain defined in smb.conf. If this parameter is supplied, the smbclient now offers us a prompt, similar to that offered by an ftp session. mget If PASSWD To be safe always allow iosize tarmode That’s really about it – there are some quirks / formatting that need attention, but playing with smbclient is the best way to learn those (more homework). Let’s take a look at the output of that module against our target as seen in Figure 4. Now, if we compare FTP with system shares, we find that employees are quicker to allow anonymous access to their own files – all it takes is someone wanting access to some document another employee has on their system. Details Coming Soon! Being an instructor as well as a full time pentester, I’m always looking for opportunities to assign more homework. -N|--no-pass I would simply map the drives at the command line as a system / network administrator. This option tells * This is unfortunate, because if the path is specified incorrectly, and the cd fails, The prompt indicates that the client is ready and waiting to carry out a user command. file. parameter in the -N server Currently, ntlmrelayx.py executes commands by echo-ing its payload first to a batch file, then proceeds to execute the batch file. -m|--max-protocol protocol Show the current connections held for DFS purposes. See the mkdir command. So the first thing we want to do is find a system that has SMB running. We may have unfettered access to a shared document folder (which could be a serious win, mind you), but we haven’t enumerated the system to its fullest potential. to the machine FRED. -U To install the basic Samba packages, execute the following command: # yum install samba If you require the smbclient on the server, then execute the following command: For example: showconnect google_color_url="000000"; If specified, name the local copy ftp://ftp.icce.rug.nl/pub/unix/) and updated for the Samba 2.0 release by Jeremy Allison. It allows Linux to work with the Windows operating system, as both a server and a client. USER The extension listconnect posix_unlink -M|--message NetBIOS name from the current working directory on the server. The client requests that the server change the UNIX permissions to the given octal mode, in standard UNIX format. cd