Are you sure you want to create this branch? ADMIN$ NO ACCESS Read previous sections to learn how to connect with credentials/Pass-the-Hash. result was NT_STATUS_NONE_MAPPED without the likes of: which most likely are monitored by the blue team. ADMIN$ NO ACCESS This can be done by providing the Username and Password followed by the target IP address of the server. While Port 139 is known technically as NBT over IP, Port 445 is SMB over IP. samsync Sam Synchronisation 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, Specially interesting from shares are the files called, by all authenticated users in the domain. result was NT_STATUS_NONE_MAPPED 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" %}. Using rpcclient we can enumerate usernames on those OSs just like a windows OS. | RRAS Memory Corruption vulnerability (MS06-025) | Current user access: READ/WRITE S-1-5-21-1835020781-2383529660-3657267081-2002 LEWISFAMILY\user (1) guest access disabled, uses encryption. Copyright 2017 pentest.tonyng.net. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1002 Active Directory Enumeration: RPCClient - Hacking Articles Let's see how this works by firstly updating the proxychains config file: Once proxychains are configured, the attacker can start enumerating the AD environment through the beacon like so: proxychains rpcclient 10.0.0.6 -U spotless, Victim (10.0.0.2) is enumerating DC (10.0.0.6) on behalf of attacker (10.0.0.5). S-1-5-21-1835020781-2383529660-3657267081-1007 LEWISFAMILY\sys (2) MSRPC was originally derived from open source software but has been developed further and copyrighted by . C$ NO ACCESS Assumes valid machine account to this domain controller. Defense Evasion. Password attack (Brute-force) Brute-force service password. LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X WORKGROUP <1e> - M In the demonstration, the user with RID 0x1f4 was enumerated regarding their password properties. [Update 2018-12-02] I just learned about smbmap, which is just great. The privileges can be enumerated using the enumprivs command on rpcclient. Chapter 2 - Recon & Enumeration - oscp New Folder (9) D 0 Sun Dec 13 05:26:59 2015 -s, --configfile=CONFIGFILE Use alternative configuration file S-1-5-21-1835020781-2383529660-3657267081-500 LEWISFAMILY\Administrator (1) Many groups are created for a specific service. exit Exit program samquerysecobj Query SAMR security object It enumerates alias groups on the domain. rpcclient $> enumprivs S-1-5-21-1835020781-2383529660-3657267081-1015 LEWISFAMILY\bin (2) result was NT_STATUS_NONE_MAPPED adddriver Add a print driver | Anonymous access: 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). 1098/1099/1050 - Pentesting Java RMI - RMI-IIOP. A Mind Map about OSCP Guide submitted by Rikunj Sindhwad on Jun 12, 2021. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2000 wwwroot Disk | State: VULNERABLE null session or valid credentials). Are there any resources out there that go in-depth about SMB enumeration? The alias is an alternate name that can be used to reference an object or element. Might ask for password. But it is also possible to get the password properties of individual users using the getusrdompwinfo command with the users RID. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2001 --------------- ---------------------- We have enumerated the users and groups on the domain but not enumerated the domain itself. . This is purely my experience with CTFs, Tryhackme, Vulnhub, and Hackthebox prior to enrolling in OSCP. For the demonstration here, RID 0x200 was used to find that it belongs to the Domain Admin groups. List of SMB versions and corresponding Windows versions: SMB1 Windows 2000, XP and Windows 2003. dsroledominfo Get Primary Domain Information 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 . | Type: STYPE_DISKTREE_HIDDEN 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. | References: 1026 - Pentesting Rusersd. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1012 queryuseraliases Query user aliases If in the above example the ttl=127, then it is safe to assume (from this information alone) that the host, 10.10.10.10, is a Linux host. Enumeration - Adithyan's Blog SeSecurityPrivilege 0:8 (0x0:0x8) Once we are connected using a null session we get another set of options: How I Won 90 Days OSCP Lab Voucher for Free, https://github.com/s0wr0b1ndef/OSCP-note/, These notes are not in the context of any machines I had during the OSCP lab or exam. ---- ----------- Enumerating Active Directory Using RPCClientInformation about password levels can be found using this MSDN article.https://docs.microsoft.com/en-us/openspecs. After creating the users and changing their passwords, its time to manipulate the groups. To enumerate the Password Properties on the domain, the getdompwinfo command can be used. To enumerate these shares the attacker can use netshareenum on the rpcclient. queryaliasmem Query alias membership It can be used on the rpcclient shell that was generated to enumerate information about the server. The below shows a couple of things. getdata Get print driver data D 0 Thu Sep 27 16:26:00 2018 Many system administrators have now written scripts around it to manage Windows NT clients from their UNIX workstation. Learn offensive CTF training from certcube labs online . Since we already performed the enumeration of such data before in the article, we will enumerate using enumdomgroup and enumdomusers and the query-oriented commands in this demonstration. It contains contents from other blogs for my quick reference, * nmap -sV --script=vulscan/vulscan.nse (https://securitytrails.com/blog/nmap-vulnerability-scan), masscan -p1-65535,U:1-65535 --rate=1000 10.10.10.x -e tun0 > ports, ports=$(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. 548 - Pentesting Apple Filing Protocol (AFP) 554,8554 - Pentesting RTSP. What permissions must be assigned to the newly created directories? This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. method. 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. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1000 with a RID:[0x457] Hex 0x457 would = decimal. OSCP/oscp-cheatsheet.md at master tagnullde/OSCP GitHub result was NT_STATUS_NONE_MAPPED --------------- ---------------------- | \\[ip]\wwwroot: | VULNERABLE: Since we performed enumeration on different users, it is only fair to extend this to various groups as well. SMB - OSCP Playbook C$ NO ACCESS 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. 1. This will extend the amount of information about the users and their descriptions. 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. | Anonymous access: READ Are you sure you want to create this branch? This is an enumeration cheat sheet that I created while pursuing the OSCP. {% endcode-tabs %}. The group information helps the attacker to plan their way to the Administrator or elevated access. A tag already exists with the provided branch name. It is also possible to add and remove privileges to a specific user as well. RPC or Remote Procedure Call is a service that helps establish and maintain communication between different Windows Applications. This will help in getting the information such as the kind of password policies that have been enforced by the Administrator in the domain. -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 '.' enumtrust Enumerate trusted domains The name is derived from the enumeration of domain groups. | IDs: CVE:CVE-2006-2370 PORT STATE SERVICE |_ https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/ [+] User SMB session establishd on [ip] In this lab, it is assumed that the attacker/operator has gained: The below shows a couple of things. Hence, the credentials were successfully enumerated and the account can be taken over now. 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. -N, --no-pass Don't ask for a password Custom wordlist. That narrows the version that the attacker might be looking at to Windows 10, Windows Server 2016, and Windows Server 2019. Author: Pavandeep Singhis a Technical Writer, Researcher, and Penetration Tester. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. That command reveals the SIDs for different users on the domain. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-500 This command retrieves the domain, server, users on the system, and other relevant information. The polices that are applied on a Domain are also dictated by the various group that exists. found 5 privileges, SeMachineAccountPrivilege 0:6 (0x0:0x6) Disk Permissions | VULNERABLE: Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. dfsenum Enumerate dfs shares so lets run rpcclient with no options to see whats available: SegFault:~ cg$ rpcclient This will use, as you point out, port 445. In this lab, it is assumed that the attacker/operator has gained: code execution on a target system and the beacon is calling back to the team server, to be interrogated by 10.0.0.5 via 10.0.0.2. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2370 If used the RID is the parameter, the samlookuprids command can extract the username relevant to that particular RID. Sharename Type Comment In the demonstration, it can be observed that the current user has been allocated 35 privileges. It can be enumerated through rpcclient using the lsaenumsid command. OSCP Enumeration Cheat Sheet. rpcclient $> netshareenum CTF solutions, malware analysis, home lab development, Looking up status of [ip] 445/tcp open microsoft-ds If Im missing something, leave a comment. # lines. getdriverdir Get print driver upload directory | Type: STYPE_DISKTREE_HIDDEN -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 demonstration, the attacker was able to provide and remove privileges to a group. See the below example gif. | smb-vuln-ms17-010: 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. . --------- ---- ------- Using lookupnames we can get the SID. rpcclient $> lookupnames lewis GENERAL OPTIONS The command netsharegetinfo followed by the name of the share you are trying to enumerate will extract details about that particular share. If you want to enumerate all the shares then use netshareenumall. logonctrl2 Logon Control 2 Usage: rpcclient [OPTION] 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. S-1-5-21-1835020781-2383529660-3657267081-1003 LEWISFAMILY\daemon (2) Let's see how this works by firstly updating the proxychains config file: {% code-tabs %} In the demonstration below, the attacker chooses S-1-1-0 SID to enumerate. enumdataex Enumerate printer data for a key This command can help with the enumeration of the LSA Policy for that particular domain. Pentesting Cheatsheets - Red Team Notes If you're having trouble getting the version from the usual methods, you might have to use wireshark or tcpdump to inspect the packets. Code execution don't work. 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. S-1-5-21-1835020781-2383529660-3657267081-2003 LEWISFAMILY\user (2) schannel Force RPC pipe connections to be sealed with 'schannel' (NETSEC). A collection of commands and tools used for conducting enumeration during my OSCP journey. list List available commands on oncybersec/oscp-enumeration-cheat-sheet - Github Guest access disabled by default. --------------- ---------------------- RID is a suffix of the long SID in a hexadecimal format. dfsadd Add a DFS share 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. At this point in time, if you can use anonymous sessions, then there are some very useful commands within the tool. 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. When provided with the username to the samlookupnames command, it can extract the RID of that particular user. SAMR To do this first, the attacker needs a SID. 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). Disclaimer: These notes are not in the context of any machines I had during the OSCP lab or exam. The ability to enumerate individually doesnt limit to the groups but also extends to the users.
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