All this can be observed in the usage of the lsaenumprivaccount command. dsroledominfo Get Primary Domain Information | \\[ip]\wwwroot: path: C:\tmp LSARPC-DS [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. . openprinter Open printer handle 2. getform Get form IS~[hostname] <00> - M Double pivot works the same, but you create the 2nd ssh tunnel via proxychains and a different dynamic port. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-500 querydominfo Query domain info SMB2 Windows Vista SP1 and Windows 2008, nmap -n -v -Pn -p139,445 -sV 192.168.0.101, smbclient -L \\$ip --option='client min protocol=NT1', # if getting error "protocol negotiation failed: NT_STATUS_CONNECTION_DISCONNECTED", # Will list all shares with available permissions, smbmap -u jsmith -p password1 -d workgroup -H 192.168.0.1, nmap --script smb-enum-shares -p 139,445 $ip, smbclient \\\\192.168.1.101\\C$ --option='client min protocol=NT1', smbclient \\\\192.168.1.101\\admin$ -U t-skid, # Connect with valid username and password, smbmap -R $sharename -H $ip -A $fileyouwanttodownload -q, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -s wwwroot -R -A '. lookupdomain Lookup Domain Name enumdataex Enumerate printer data for a key getdataex Get printer driver data with keyname | Type: STYPE_DISKTREE From the enumdomusers command, it was possible to obtain the users of the domain as well as the RID. --------------- ---------------------- | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2370 Hydra (http://www.thc.org) starting at 2007-07-27 21:51:46 . |_ https://technet.microsoft.com/en-us/library/security/ms06-025.aspx | State: VULNERABLE logonctrl2 Logon Control 2 Depending on the user privilege it is possible to change the password using the chgpasswd command. You signed in with another tab or window. getprinter Get printer info Cannot retrieve contributors at this time. ? Code execution don't work. dfsenum Enumerate dfs shares shutdowninit Remote Shutdown (over shutdown pipe) rpcclient $> queryuser msfadmin. -z $2 ]; then rport=$2; else rport=139; fi, tcpdump -s0 -n -i tap0 src $rhost and port $rport -A -c 7 2>/dev/null | grep -i "samba\|s.a.m" | tr -d '.' In the previous command, we used the getdompwinfo to get the password properties of the domain administrated by the policies. This command is made from LSA Query Security Object. | Comment: Since we performed enumeration on different users, it is only fair to extend this to various groups as well. First one - two Cobalt Strike sessions: PID 260 - beacon injected into dllhost process. In the demonstration, it can be observed that a query was generated for LSA which returned with information such as Domain Name and SID. It contains contents from other blogs for my quick reference, * nmap -sV --script=vulscan/vulscan.nse (https://securitytrails.com/blog/nmap-vulnerability-scan), masscan -p1-65535,U:1-65535 --rate=1000 10.10.10.x -e tun0 > ports, ports=$(cat ports | awk -F " " '{print $4}' | awk -F "/" '{print $1}' | sort -n | tr '\n' ',' | sed 's/,$//'), nmap -Pn -sC -sV --script=vuln*.nse -p$ports 10.10.10.x -T5 -A, (performs full scan instead of syn-scan to prevent getting flagged by firewalls), From Apache Version to finding Ubuntu version -> ubuntu httpd versions, : Private key that is used for login. dsenumdomtrusts Enumerate all trusted domains in an AD forest rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1008 |_smb-vuln-regsvc-dos: ERROR: Script execution failed (use -d to debug) rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1010 Reverse Shell. -A, --authentication-file=FILE Get the credentials from a file password: Can be Contacted onTwitterandLinkedIn, All Rights Reserved 2021 Theme: Prefer by, Windows Privilege Escalation: DnsAdmins to DomainAdmin. Adding it to the original post. Nowadays it is not very common to encounter hosts that have null sessions enabled, but it is worth a try if you do stumble across one. The manipulation of the groups is not limited to the creation of a group. ---- ----------- Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. The article is focused on Red Teamers but Blue Teamers and Purple Teamers can also use these commands to test the security configurations they deployed. During that time, the designers of the rpcclient might be clueless about the importance of this tool as a penetration testing tool. Thus it might be worth a short to try to manually connect to a share. list List available commands on 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. It is possible to target the group using the RID that was extracted while running the enumdomgroup. 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). The lsaaddacctrights command can be used to add privileges to a user based on their SID. --------------- ---------------------- Adding it to the original post. Enumerate Domain Users. Allow connecting to the service without using a password? The command to be used to delete a group using deletedomgroup. 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). LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X 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. | References: When dealing with SMB an attacker is bound to be dealt with the Network Shares on the Domain. In the previous demonstration, the attacker was able to provide and remove privileges to a group. Start by typing "enum" at the prompt and hitting <tab><tab>: rpcclient $> enum enumalsgroups enumdomains enumdrivers enumkey enumprivs enumdata enumdomgroups enumforms enumports enumtrust enumdataex enumdomusers enumjobs enumprinter. -d, --debuglevel=DEBUGLEVEL Set debug level (MS)RPC. Are you sure you want to create this branch? rpcclient is a utility initially developed to test MS-RPC functionality in Samba itself. platform_id : 500 This is purely my experience with CTFs, Tryhackme, Vulnhub, and Hackthebox prior to enrolling in OSCP. It may be possible that you are restricted to display any shares of the host machine and when you try to list them it appears as if there aren't any shares to connect to. Description. That narrows the version that the attacker might be looking at to Windows 10, Windows Server 2016, and Windows Server 2019. The tool that we will be using for all the enumerations and manipulations will be rpcclient. |_smb-vuln-ms10-061: false During our previous demonstrations, we were able to enumerate the permissions and privileges of users and groups based on the RID of that particular user. if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! | Type: STYPE_IPC_HIDDEN Running something like ngrep -i -d tap0 's.?a.?m.?b.?a. NETLOGON NO ACCESS | RRAS Memory Corruption vulnerability (MS06-025) The name is derived from the enumeration of domain groups. 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. In the demonstration, it can be observed that the current user has been allocated 35 privileges. *[[: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. --------------- ---------------------- # You will be asked for a password but leave it blank and press enter to continue. [hostname] <00> - M rewardone in the PWK forums posted a neat script to easily get Samba versions: When you run this on a box running Samba, you get results: When in doubt, we can check the smb version in PCAP. netfileenum Enumerate open files Active Directory & Kerberos Abuse. | Anonymous access: The hash can then be cracked offline or used in an. S-1-5-21-1835020781-2383529660-3657267081-2003 LEWISFAMILY\user (2) Once we are connected using a null session we get another set of options: Disk Permissions INet~Services <1c> - M A null session is a connection with a samba or SMB server that does not require authentication with a password. S-1-5-21-1835020781-2383529660-3657267081-1011 LEWISFAMILY\operator (2) --------------- ---------------------- exit Exit program queryusergroups Query user groups This can be extracted using the lookupnames command used earlier. result was NT_STATUS_NONE_MAPPED SPOOLSS enumprinters Enumerate printers Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Once we have a SID we can enumerate the rest. This command will show you the shares on the host, as well as your access to them. It contains contents from other blogs for my quick reference | Type: STYPE_DISKTREE_HIDDEN MAC Address: 00:50:56:XX:XX:XX (VMware) 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. queryuseraliases Query user aliases deletedomuser Delete domain user S-1-5-21-1835020781-2383529660-3657267081-1003 LEWISFAMILY\daemon (2) --usage Display brief usage message, Common samba options: samlogon Sam Logon and therefore do not correspond to the rights assigned locally on the server. deleteform Delete form List of SMB versions and corresponding Windows versions: SMB1 Windows 2000, XP and Windows 2003. #rpcclient $>srvinfo #rpcclient $>enumdomusers #rpcclient $>querydominfo #rpcclient $>getdompwinfo //password policy #rpcclient $>netshareenum #nmblookup -A 192.168.1.1 Reconnecting with SMB1 for workgroup listing. In other words - it's possible to enumerate AD (or create/delete AD users, etc.) Enumerate Domain Groups. A NetBIOS name is up to 16 characters long and usually, separate from the computer name. SQL Injection & XSS Playground. | \\[ip]\share: It also includes the commands that I used on platforms such as Vulnhub and Hack the Box. Hence, they usually set up a Network Share. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2004 The child-parent relationship here can also be depicted as client and server relation. Password: The command netsharegetinfo followed by the name of the share you are trying to enumerate will extract details about that particular share. [+] User SMB session establishd on [ip] IPC$ NO ACCESS Author: Pavandeep Singhis a Technical Writer, Researcher, and Penetration Tester. The main application area of the protocol has been the, operating system series in particular, whose network services support SMB in a downward-compatible manner - which means that devices with newer editions can easily communicate with devices that have an older Microsoft operating system installed. -O, --socket-options=SOCKETOPTIONS socket options to use SRVSVC result was NT_STATUS_NONE_MAPPED. S-1-5-21-1835020781-2383529660-3657267081-1001 LEWISFAMILY\wheel (2) For instance, on Windows, SMB can run directly over TCP/IP without the need for NetBIOS over TCP/IP. To enumerate the Password Properties on the domain, the getdompwinfo command can be used. # download everything recursively in the wwwroot share to /usr/share/smbmap. These commands should only be used for educational purposes or authorised testing. Flashcards. Might ask for password. This is what happens - attacker (10.0.0.5) uses proxychains with impacket's reg utility to retrieve the hostname of the box at 10.0.0.7 (WS02) via the compromised (CS beacon) box 10.0.0.2 (WS01): keyName hklm\system\currentcontrolset\control\computername\computername. maybe brute-force ; 22/SSH. share Disk Try "help" to get a list of possible commands. Read previous sections to learn how to connect with credentials/Pass-the-Hash. We can also check if the user we created has been assigned a SID or not using the lookupnames command on the rpcclient. SecureAuthCorp/impacket, https://www.cobaltstrike.com/help-socks-proxy-pivoting. -s, --configfile=CONFIGFILE Use alternative configuration file {% endcode-tabs %}. See the below example gif. Honor privileges assigned to specific SID? 548 - Pentesting Apple Filing Protocol (AFP) 554,8554 - Pentesting RTSP. ---- ----------- There are numerous tools and methods to perform enumeration, we will be finding different types of information on SMB throughout the article. Many groups are created for a specific service. 1. --------------- ---------------------- What permissions must be assigned to the newly created directories? There are times where these share folders may contain sensitive or Confidential information that can be used to compromise the target. 623/UDP/TCP - IPMI. It enumerates alias groups on the domain. Replication READ ONLY | Anonymous access: result was NT_STATUS_NONE_MAPPED A collection of commands and tools used for conducting enumeration during my OSCP journey. To enumerate a particular user from rpcclient, the queryuser command must be used. result was NT_STATUS_NONE_MAPPED It can be enumerated through rpcclient using the lsaenumsid command. Red Team Infrastructure. | Type: STYPE_DISKTREE querygroup Query group info enumdata Enumerate printer data | Disclosure date: 2006-6-27 enumprivs Enumerate privileges Are there any resources out there that go in-depth about SMB enumeration? These may indicate whether the share exists and you do not have access to it or the share does not exist at all. NT_STATUS_ACCESS_DENIED or NT_STATUS_BAD_NETWORK_NAME), # returns NT_STATUS_ACCESS_DENIED or even gives you a session.
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