Replication READ ONLY Adding it to the original post. 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 . It is possible to enumerate the SAM data through the rpcclient as well. Guest access disabled by default. guest access disabled, uses encryption. lookupsids Convert SIDs to names enumprinters Enumerate printers This means that SMB is running with NetBIOS over TCP/IP**. The privileges can be enumerated using the enumprivs command on rpcclient. Learn more about the OS Versions. S-1-5-21-1835020781-2383529660-3657267081-1015 LEWISFAMILY\bin (2) If Im missing something, leave a comment. It enumerates alias groups on the domain. Query Group Information and Group Membership. Allow listing available shares in the current share? enumkey Enumerate printer keys 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. timeout connecting to 192.168.182.36:445 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. Curious to see if there are any "guides" out there that delve into SMB . In this specific demonstration, there are a bunch of users that include Administrator, yashika, aarti, raj, Pavan, etc. SHUTDOWN password: rpcclient $> srvinfo -s, --configfile=CONFIGFILE Use alternative configuration file 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. change_trust_pw Change Trust Account Password -?, --help Show this help message MAC Address = 00-50-56-XX-XX-XX, [+] Finding open SMB ports. oscp pwk enumeration smb nmblookup smbclient rpcclient nmap enum4linux smbmap S-1-5-21-1835020781-2383529660-3657267081-1007 LEWISFAMILY\sys (2) rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1007 . Impacket, 1a3487d42adaa12332bdb34a876cb7e6:1a3487d42adaa12332bdb34a876cb7e6 query. To do this first, the attacker needs a SID. In general, the rpcclient can be used to connect to the SMB protocol as well. While Port 139 is known technically as NBT over IP, Port 445 is SMB over IP. | Anonymous access: READ Defense Evasion. | method. 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. 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. The child-parent relationship here can also be depicted as client and server relation. The below shows a couple of things. remark: IPC Service (Mac OS X) rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1010 -k, --kerberos Use kerberos (active directory) rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1013 Hydra (http://www.thc.org) starting at 2007-07-27 21:51:46 Forbid the creation and modification of files? It is also possible to add and remove privileges to a specific user as well. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2002 Disclaimer: These notes are not in the context of any machines I had during the OSCP lab or exam. samlookuprids Look up names Can be Contacted onTwitterandLinkedIn, All Rights Reserved 2021 Theme: Prefer by, Windows Privilege Escalation: DnsAdmins to DomainAdmin. The next command to observe is the lsaquerysecobj command. After creating the group, it is possible to see the newly created group using the enumdomgroup command. At this point in time, if you can use anonymous sessions, then there are some very useful commands within the tool. This command can help with the enumeration of the LSA Policy for that particular domain. getdata Get print driver data proxychains nmap -sTV -n -PN -p 80,22 target-ip -vv. This is newer version of SMB. This command will show you the shares on the host, as well as your access to them. setform Set form | A critical remote code execution vulnerability exists in Microsoft SMBv1 result was NT_STATUS_NONE_MAPPED But it is also possible to get the password properties of individual users using the getusrdompwinfo command with the users RID. result was NT_STATUS_NONE_MAPPED Password Checking if you found with other enum . A Little Guide to SMB Enumeration. The alias is an alternate name that can be used to reference an object or element. In the demonstration, it can be observed that lsaenumsid has enumerated 20 SIDs within the Local Security Authority or LSA. REG In the demonstration, it can be observed that the user has stored their credentials in the Description. enumdata Enumerate printer data Enumerate Domain Groups. 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). rffpcnex Rffpcnex test srvinfo Server query info It has undergone several stages of development and stability. Copyright 2017 pentest.tonyng.net. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1006 This is an enumeration cheat sheet that I created while pursuing the OSCP. | Anonymous access:
S-1-5-21-1835020781-2383529660-3657267081-1001 LEWISFAMILY\wheel (2) C$ NO ACCESS March 8, 2021 by Raj Chandel. Thus it might be worth a short to try to manually connect to a share. | Risk factor: HIGH This can be verified using the enumdomgroups command. The name is derived from the enumeration of domain groups. On most Linuxes, we have tab auto-complete of commands, which extends into rpcclient commands. Allow connecting to the service without using a password? That narrows the version that the attacker might be looking at to Windows 10, Windows Server 2016, and Windows Server 2019. --------------- ---------------------- ** (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. Pentesting Cheatsheets. Some of these commands are based on those executed by the Autorecon tool. It is possible to enumerate the minimum password length and the enforcement of complex password rules. OSCP Enumeration Cheat Sheet. enumalsgroups Enumerate alias groups I tend to check: nbtscan. Metasploit SMB auxiliary scanners. samlookupnames Look up names Created with Xmind. LSARPC Protocol_Name: SMB #Protocol Abbreviation if there is one. enumdomusers Enumerate domain users --------------- ---------------------- Double pivot works the same, but you create the 2nd ssh tunnel via proxychains and a different dynamic port. S-1-5-21-1835020781-2383529660-3657267081-1000 LEWISFAMILY\root (1) There are numerous tools and methods to perform enumeration, we will be finding different types of information on SMB throughout the article. May need to run a second time for success. For this particular demonstration, we will first need a SID. enumtrust Enumerate trusted domains Usage: rpcclient [OPTION] IPC$ NO ACCESS [+] IP: [ip]:445 Name: [ip] help Get help on commands offensive security. --------- ------- MAC Address: 00:50:56:XX:XX:XX (VMware) [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 . great when smbclient doesnt work | smb-enum-shares: A collection of commands and tools used for conducting enumeration during my OSCP journey. New Folder - 6 D 0 Sun Dec 13 06:55:42 2015 Use `proxychains + command" to use the socks proxy. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1004 | Anonymous access: Similarly to enumerate the Primary Domain Information such as the Role of the machine, Native more of the Domain can be done using the dsroledominfo command as demonstrated. Can try without a password (or sending a blank password) and still potentially connect. Shortcut to New Folder (2).lnk A 420 Sun Dec 13 05:24:51 2015 | IDs: CVE:CVE-2017-0143 | Disclosure date: 2017-03-14 This will use, as you point out, port 445. Server Message Block in modern language is also known as Common Internet File System. This problem is solved using lookupnames whereupon providing username the SID of that particular user can be extracted with ease. # lines. With an anonymous null session you can access the IPC$ share and interact with services exposed via named pipes. setprinterdata Set REG_SZ printer data From the enumdomusers command, it was possible to obtain the users of the domain as well as the RID. logonctrl Logon Control 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 %} *[[: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. This information includes the Group Name, Description, Attributes, and the number of members in that group. 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 $ip, Windows NT, 2000, and XP (most SMB1) - VULNERABLE: Null Sessions can be created by default, Windows 2003, and XP SP2 onwards - NOT VULNERABLE: Null Sessions can't be created default. password: | Comment: Remote Admin lookupnames Convert names to SIDs echoaddone Add one to a number great when smbclient doesnt work, Rpcclient is a Linux tool used for executing client-side MS-RPC functions. Running something like ngrep -i -d tap0 's.?a.?m.?b.?a. *[0-9a-z]' | tr -d '\n' & echo -n "$rhost: " &, echo "exit" | smbclient -L $rhost 1>/dev/null 2>/dev/null. The connection uses. In the case of queryusergroups, the group will be enumerated. Beyond the enumeration I show here, it will also help enumerate shares that are readable, and can ever execute commands on writable shares. | References: The command to be used to delete a group using deletedomgroup. smbclient (null session) enum4linux. maybe brute-force ; 22/SSH. I create my own checklist for the first but very important step: Enumeration. lsaenumsid Enumerate the LSA SIDS The ability to enumerate individually doesnt limit to the groups but also extends to the users. In the demonstration, it can be observed that the SID that was enumerated belonged to the Administrator of the Builtin users. To enumerate these shares the attacker can use netshareenum on the rpcclient. S-1-5-21-1835020781-2383529660-3657267081-500 LEWISFAMILY\Administrator (1) Adding it to the original post. Workgroup Master | \\[ip]\ADMIN$: addprinter Add a printer samsync Sam Synchronisation S-1-5-21-1835020781-2383529660-3657267081-1002 LEWISFAMILY\daemon (1) getdataex Get printer driver data with keyname Disk Permissions Obviously the SIDS are different but you can still pull down the usernames and start bruteforcing those other open services. addform Add form
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