rpcclient enumeration oscp
great when smbclient doesnt work, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -x whoami # no work, smbmap -R $sharename -H $ip -A $fileyouwanttodownload -q, # Requires root or enough permissions to use tcpdump, # Will listen for the first 7 packets of a null login, # Will sometimes not capture or will print multiple. To extract information about the domain, the attacker can provide the domain name as a parameter to the command lookupdomain as demonstrated. WARNING: Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort IPC$ NO ACCESS [+] IP: [ip]:445 Name: [ip] We can also check if the user we created has been assigned a SID or not using the lookupnames command on the rpcclient. 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. For the demonstration here, RID 0x200 was used to find that it belongs to the Domain Admin groups. setprintername Set printername S-1-5-21-1835020781-2383529660-3657267081-1003 LEWISFAMILY\daemon (2) authentication Assumes valid machine account to this domain controller. Replication READ ONLY | A buffer overflow vulnerability in the Routing and Remote Access service (RRAS) in Microsoft Windows 2000 SP4, XP SP1 Learn more about the OS Versions. exit Exit program | Current user access: READ/WRITE enumalsgroups Enumerate alias groups rpcclient $> lookupnames lewis lsaaddacctrights Add rights to an account When using querygroupmem, it will reveal information about that group member specific to that particular RID. Honor privileges assigned to specific SID? 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. It also includes the commands that I used on platforms such as Vulnhub and Hack the Box. It is possible to target the group using the RID that was extracted while running the enumdomgroup. | Current user access: deldriver Delete a printer driver To look for possible exploits to the SMB version it important to know which version is being used. rpcclient $> lookupnames root Once proxychains are configured, the attacker can start enumerating the AD environment through the beacon like so: Moving on, same way, they can query info about specific AD users: Enumerate current user's privileges and many more (consult rpcclient for all available commands): Finally, of course they can run nmap if needed: Impacket provides even more tools to enumerate remote systems through compromised boxes. When using the enumdomgroup we see that we have different groups with their respective RID and when this RID is used with the queryusergroups it reveals information about that particular holder or RID. Adding it to the original post. Thus it might be worth a short to try to manually connect to a share. The connection uses. Allow listing available shares in the current share? netname: ADMIN$ | account_used: guest debuglevel Set debug level [hostname] <20> - M # lines. | Current user access: READ/WRITE During that time, the designers of the rpcclient might be clueless about the importance of this tool as a penetration testing tool. MSRPC was originally derived from open source software but has been developed further and copyrighted by . | Anonymous access: Port_Number: 137,138,139 #Comma separated if there is more than one. samquerysecobj Query SAMR security object PORT STATE SERVICE Enumerating Windows Domains with rpcclient through SocksProxy == Bypassing Command Line Logging 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). rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1008 S-1-5-21-1835020781-2383529660-3657267081-1000 LEWISFAMILY\root (1) | \\[ip]\ADMIN$: to access through Web; FTP to file upload ==> Execute from web == webshell ; Password Checking if you found with other enum. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. queryusergroups Query user groups Are you sure you want to create this branch? The name is derived from the enumeration of domain groups. | State: VULNERABLE 1098/1099/1050 - Pentesting Java RMI - RMI-IIOP. Wordlist dictionary. 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. Another command to use is the enumdomusers. | Comment: Remote IPC In other words - it's possible to enumerate AD (or create/delete AD users, etc.) Disclaimer: These notes are not in the context of any machines I had during the OSCP lab or exam. timeout connecting to 192.168.182.36:445 You can also fire up wireshark and list target shares with smbclient , you can use anonymous listing to explained above and after that find , # 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, hydra -t 1 -V -f -l administrator -P /usr/share/wordlists/rockyou.txt $ip smb, nmap -p445 --script smb-brute --script-args userdb=userfilehere,passdb=/usr/share/seclists/Passwords/Common-Credentials/10-million-password-list-top-1000000.txt $ip -vvvv. -S, --signing=on|off|required Set the client signing state exit takes care of any password request that might pop up, since were checking for null login. From the enumdomusers command, it was possible to obtain the users of the domain as well as the RID. In general, the rpcclient can be used to connect to the SMB protocol as well. This is an enumeration cheat sheet that I created while pursuing the OSCP. without the likes of: which most likely are monitored by the blue team. Curious to see if there are any "guides" out there that delve into SMB . lookupnames Convert names to SIDs platform_id : 500 getdata Get print driver data schannelsign Force RPC pipe connections to be signed (not sealed) with 'schannel' (NETSEC). Match. *[[:digit:]]' port 139 in one terminal and then echo exit | smbclient -L [IP] in another will dump out a bunch of info including the version. A collection of commands and tools used for conducting enumeration during my OSCP journey. After creating the group, it is possible to see the newly created group using the enumdomgroup command. Hence, they usually set up a Network Share. Code execution don't work. schannel Force RPC pipe connections to be sealed with 'schannel' (NETSEC). | Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010) May need to run a second time for success. 3. so lets run rpcclient with no options to see whats available: SegFault:~ cg$ rpcclient As from the previous commands, we saw that it is possible to create a user through rpcclient. After that command was run, rpcclient will give you the most excellent "rpcclient> " prompt. MAC Address: 00:50:56:XX:XX:XX (VMware) The tool is written in Perl and is basically . PORT STATE SERVICE Null sessions were enabled by default on legacy systems but have been disabled from Windows XP SP2 and Windows Server 2003. 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. rpcclient $> queryuser msfadmin. Read previous sections to learn how to connect with credentials/Pass-the-Hash. First one - two Cobalt Strike sessions: PID 260 - beacon injected into dllhost process. Protocol_Name: SMB #Protocol Abbreviation if there is one. Depending on the user privilege it is possible to change the password using the chgpasswd command. After establishing the connection, to get the grasp of various commands that can be used you can run the help. Ill include examples, but where I use PWK labs, Ill anonymize the data per their rules. As with the lsaenumsid, it was possible to extract the SID but it was not possible to tell which user has that SID. dsroledominfo Get Primary Domain Information When provided with the username to the samlookupnames command, it can extract the RID of that particular user. and Unix distributions and thus cross-platform communication via SMB. The child-parent relationship here can also be depicted as client and server relation. You signed in with another tab or window. 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). The below shows a couple of things. 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. Nice! . smbclient (null session) enum4linux. | A critical remote code execution vulnerability exists in Microsoft SMBv1 rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2000 ** (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. The next command that can be used is enumalsgroups. Forbid the creation and modification of files? logonctrl Logon Control rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1003 To enumerate these shares the attacker can use netshareenum on the rpcclient. deletedomuser Delete domain user You can indicate which option you prefer to use with the parameter, # Using --exec-method {mmcexec,smbexec,atexec,wmiexec}, via SMB) in the victim machine and use it to, it is located on /usr/share/doc/python3-impacket/examples/, #If no password is provided, it will be prompted, Stealthily execute a command shell without touching the disk or running a new service using DCOM via, #You can append to the end of the command a CMD command to be executed, if you dont do that a semi-interactive shell will be prompted, Execute commands via the Task Scheduler (using, https://www.hackingarticles.in/beginners-guide-to-impacket-tool-kit-part-1/, #Get usernames bruteforcing that rids and then try to bruteforce each user name, This attack uses the Responder toolkit to. This can be extracted using the lookupnames command used earlier. password: Learn. -c, --command=COMMANDS Execute semicolon separated cmds IPC$ IPC Remote IPC 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 Code Execution. Are you sure you want to create this branch? In this specific demonstration, there are a bunch of users that include Administrator, yashika, aarti, raj, Pavan, etc. ADMIN$ NO ACCESS SaAddUsers 0:65281 (0x0:0xff01) This article can serve as a reference for Red Team activists for attacking and enumerating the domain but it can also be helpful for the Blue Team to understand and test the measures applied on the domain to protect the Network and its users. -N, --no-pass Don't ask for a password result was NT_STATUS_NONE_MAPPED In the demonstration, it can be observed that the current user has been allocated 35 privileges. This will use, as you point out, port 445. remark: PSC 2170 Series Disk Permissions Dec 2, 2018, PWK Notes: SMB Enumeration Checklist [Updated]. [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. -I, --dest-ip=IP Specify destination IP address, Help options lsaquerysecobj Query LSA security object | 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. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2004 | and SP2, and Server 2003 SP1 and earlier allows remote unauthenticated or authenticated attackers to This command can help with the enumeration of the LSA Policy for that particular domain. 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. --------- -------, Starting Nmap 7.70 ( https://nmap.org ) at 2018-09-27 16:25 EDT rpcclient is a utility initially developed to test MS-RPC functionality in Samba itself. querydispinfo Query display info Assumes valid machine account to this domain controller. | smb-enum-shares: This is an enumeration cheat sheet that I created while pursuing the OSCP. Author: Pavandeep Singhis a Technical Writer, Researcher, and Penetration Tester. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1002 smbmap -H [ip/hostname] will show what you can do with given credentials (or null session if no credentials). queryaliasmem Query alias membership queryuseraliases Query user aliases GENERAL OPTIONS Red Team Infrastructure. The tool that we will be using for all the enumerations and manipulations will be rpcclient. Query Group Information and Group Membership. 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. If the permissions allow, an attacker can delete a group as well. Using rpcclient we can enumerate usernames on those OSs just like a windows OS. echoaddone Add one to a number 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. Using rpcclient we can enumerate usernames on those OS's just like a windows OS. path: C:\tmp | VULNERABLE: rpcclient -U "" 192.168.1.100 rpcclient $> querydominfo . enumports Enumerate printer ports Flashcards. Impacket, 1a3487d42adaa12332bdb34a876cb7e6:1a3487d42adaa12332bdb34a876cb7e6 query. C$ NO ACCESS The next command to demonstrate is lookupsids. 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. March 8, 2021 by Raj Chandel. The manipulation of the groups is not limited to the creation of a group. 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. root S-1-5-21-1835020781-2383529660-3657267081-1000 (User: 1) WORKGROUP <1e> - M After enumerating groups, it is possible to extract details about a particular group from the list. In this article, we are going to focus on the enumeration of the Domain through the SMB and RPC channels. # 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. 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. enumforms Enumerate forms path: C:\tmp New Folder (9) D 0 Sun Dec 13 05:26:59 2015 ---- ----------- See examples in the previous section. oscp pwk enumeration smb nmblookup smbclient rpcclient nmap enum4linux smbmap It has a total of 67 users. Double pivot works the same, but you create the 2nd ssh tunnel via proxychains and a different dynamic port. *' # download everything recursively in the wwwroot share to /usr/share/smbmap. --------- ---- ------- These may indicate whether the share exists and you do not have access to it or the share does not exist at all. [+] IP: [ip]:445 Name: [ip] setform Set form It can be observed that the os version seems to be 10.0. MAC Address: 00:50:56:XX:XX:XX (VMware) 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. It enumerates alias groups on the domain. shutdownabort Abort Shutdown (over shutdown pipe) This is purely my experience with CTFs, Tryhackme, Vulnhub, and Hackthebox prior to enrolling in OSCP. One of the first enumeration commands to be demonstrated here is the srvinfo command. | IDs: CVE:CVE-2006-2370 help Get help on commands This command can be used to extract the details regarding the user that the SID belongs. [Update 2018-12-02] I just learned about smbmap, which is just great. Software applications that run on a NetBIOS network locate and identify each other via their NetBIOS names. guest access disabled, uses encryption. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2003 | Disclosure date: 2017-03-14 --------------- ---------------------- rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1010 Enumerate Domain Users. 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. The ability to interact with privileges doesnt end with the enumeration regarding the SID or privileges. setprinter Set printer comment It is possible to enumerate the SAM data through the rpcclient as well. The ability to manipulate a user doesnt end with creating a user or changing the password of a user. Where the output of the magic script needs to be stored? result was NT_STATUS_NONE_MAPPED What permissions must be assigned to the newly created files? Created with Xmind. os version : 4.9 OSCP notes: ACTIVE INFORMATION GATHERING. Server Message Block in modern language is also known as. After the user details and the group details, another information that can help an attacker that has retained the initial foothold on the domain is the Privileges. 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. ECHO 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. rpcclient $> lookupnames guest dfsgetinfo Query DFS share info |_ Current user access: READ guest S-1-5-21-1835020781-2383529660-3657267081-1063 (Local Group: 4) -O, --socket-options=SOCKETOPTIONS socket options to use MAC Address = 00-50-56-XX-XX-XX, [+] Finding open SMB ports. # You will be asked for a password but leave it blank and press enter to continue. NETLOGON NO ACCESS | grep -oP 'UnixSamba. Enumerate Domain Groups. In this lab, it is assumed that the attacker/operator has gained: The below shows a couple of things. setdriver Set printer driver S-1-5-21-1835020781-2383529660-3657267081-1015 LEWISFAMILY\bin (2) [+] User SMB session establishd on [ip] When used with the builtin parameter, it shows all the built-in groups by their alias names as demonstrated below. Test. Manh-Dung Nguyen Blog Pentest Publications Whoami @ Can try without a password (or sending a blank password) and still potentially connect. Upon running this on the rpcclient shell, it will extract the usernames with their RID. Once we have a SID we can enumerate the rest. getdcname Get trusted DC name Nmap scan report for [ip] rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-502 .. D 0 Thu Sep 27 16:26:00 2018 What permissions must be assigned to the newly created directories? result was NT_STATUS_NONE_MAPPED enumdata Enumerate printer data There are a couple of machines in the lab that will only work on the first attempt, and . rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1013
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