Code Execution. | \\[ip]\C$: #rpcclient $>srvinfo #rpcclient $>enumdomusers #rpcclient $>querydominfo #rpcclient $>getdompwinfo //password policy #rpcclient $>netshareenum #nmblookup -A 192.168.1.1 samquerysecobj Query SAMR security object Adding it to the original post. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. PORT STATE SERVICE After establishing the connection, to get the grasp of various commands that can be used you can run the help. WARNING: Restorefile (./hydra.restore) from a previous session found, to prevent overwriting, you have 10 seconds to abort adddriver Add a print driver RPC or Remote Procedure Call is a service that helps establish and maintain communication between different Windows Applications. Using rpcclient we can enumerate usernames on those OSs just like a windows OS. 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. [hostname] <00> - M # download everything recursively in the wwwroot share to /usr/share/smbmap. 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. It is possible to target the group using the RID that was extracted while running the enumdomgroup. Cannot retrieve contributors at this time. offensive security. Using lookupnames we can get the SID. --------------- ---------------------- S-1-5-21-1835020781-2383529660-3657267081-1005 LEWISFAMILY\kmem (2) SaAddUsers 0:65281 (0x0:0xff01) After creating the group, it is possible to see the newly created group using the enumdomgroup command. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143 We can also check if the user we created has been assigned a SID or not using the lookupnames command on the rpcclient. 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. LSARPC authentication | Comment: Default share ECHO server type : 0x9a03. rpcclient (if 111 is also open) NSE scripts. 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. object in the NAME_DOMAIN.LOCAL domain and you will never see this paired value tied to another object in this domain or any other. -d, --debuglevel=DEBUGLEVEL Set debug level -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 '.' After creating the users and changing their passwords, its time to manipulate the groups. Replication READ ONLY Try "help" to get a list of possible commands. It can be done with the help of the createdomuser command with the username that you want to create as a parameter. This is an enumeration cheat sheet that I created while pursuing the OSCP. [Update 2018-12-02] I just learned about smbmap, which is just great. rpcclient is a utility initially developed to test MS-RPC functionality in Samba itself. Server Message Block in modern language is also known as Common Internet File System. 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 $ip, Windows NT, 2000, and XP (most SMB1) - VULNERABLE: Null Sessions can be created by default, Windows 2003, and XP SP2 onwards - NOT VULNERABLE: Null Sessions can't be created default. S-1-5-21-1835020781-2383529660-3657267081-1009 LEWISFAMILY\tty (2) *[0-9a-z]' | tr -d '\n' & echo -n "$rhost: " &, echo "exit" | smbclient -L $rhost 1>/dev/null 2>/dev/null. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1011 Match. | Type: STYPE_DISKTREE WORKGROUP <1e> - M rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1007 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. --------- ------- S-1-5-21-1835020781-2383529660-3657267081-501 LEWISFAMILY\unknown (1) Password Checking if you found with other enum . <03> - M --------------- ---------------------- During that time, the designers of the rpcclient might be clueless about the importance of this tool as a penetration testing tool. PORT STATE SERVICE lsaenumacctrights Enumerate the rights of an SID *' # download everything recursively in the wwwroot share to /usr/share/smbmap. 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. great when smbclient doesnt work [+] IP: [ip]:445 Name: [ip] Most secure. *[[: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. These commands should only be used for educational purposes or authorised testing. 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. Query Group Information and Group Membership. 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 %} Nowadays it is not very common to encounter hosts that have null sessions enabled, but it is worth a try if you do stumble across one. none Force RPC pipe connections to have no special properties, Lets play with a few options: | Disclosure date: 2017-03-14 The next command to observe is the lsaquerysecobj command. netfileenum Enumerate open files IS~[hostname] <00> - M Red Team Infrastructure. GENERAL OPTIONS ** (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. netname: ADMIN$ It enumerates alias groups on the domain. Since we performed enumeration on different users, it is only fair to extend this to various groups as well. getdriverdir Get print driver upload directory When provided with the username to the samlookupnames command, it can extract the RID of that particular user. 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 $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1005 Disk Permissions The ability to interact with privileges doesnt end with the enumeration regarding the SID or privileges. remark: PSC 2170 Series This can be extracted using the lookupnames command used earlier. Heres an example Unix Samba 2.2.3a: Windows SMB is more complex than just a version, but looking in wireshark will give a bunch of information about the connection. Get help on commands SAMR However, for this particular demonstration, we are using rpcclient. 139/tcp open netbios-ssn May need to run a second time for success. S-1-5-21-1835020781-2383529660-3657267081-500 LEWISFAMILY\Administrator (1) The RPC service works on the RPC protocols that form a low-level inter-process communication between different Applications. The system operates as an application-layer network protocol primarily used for offering shared access to files, printers, serial ports, and other sorts of communications between nodes on a network. -U, --user=USERNAME Set the network username As with the lsaenumsid, it was possible to extract the SID but it was not possible to tell which user has that SID. lewis S-1-5-21-1835020781-2383529660-3657267081-2002 (User: 1) so lets run rpcclient with no options to see whats available: SegFault:~ cg$ rpcclient Many groups are created for a specific service. 1026 - Pentesting Rusersd. | Comment: Remote Admin This command is made from LSA Query Security Object. To extract further information about that user or in case during the other enumeration the attacker comes into the touch of the SID of a user, then they cause to use the lookupsids command to get more information about that particular user. In the scenarios where there is a possibility of multiple domains in the network, there the attacker can use enumdomains to enumerate all the domains that might be deployed in that network. This command retrieves the domain, server, users on the system, and other relevant information. root S-1-5-21-1835020781-2383529660-3657267081-1000 (User: 1) | A buffer overflow vulnerability in the Routing and Remote Access service (RRAS) in Microsoft Windows 2000 SP4, XP SP1 1690825 blocks of size 2048. Active Directory & Kerberos Abuse. To enumerate a particular user from rpcclient, the queryuser command must be used. | Type: STYPE_DISKTREE_HIDDEN Usage: rpcclient [OPTION] This information can be elaborated on using the querydispinfo. [+] User SMB session establishd on [ip] schannelsign Force RPC pipe connections to be signed (not sealed) with 'schannel' (NETSEC). A tag already exists with the provided branch name. I tend to check: nbtscan. smbclient (null session) enum4linux. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-500 It also includes the commands that I used on platforms such as Vulnhub and Hack the Box. The ability to enumerate individually doesnt limit to the groups but also extends to the users. -S, --signing=on|off|required Set the client signing state We will shine the light on the process or methodology for enumerating SMB services on the Target System/Server in this article. At this point in time, if you can use anonymous sessions, then there are some very useful commands within the tool. without the likes of: which most likely are monitored by the blue team. S-1-5-21-1835020781-2383529660-3657267081-1002 LEWISFAMILY\daemon (1) | Current user access: 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. The group information helps the attacker to plan their way to the Administrator or elevated access. Enum4linux is a Linux alternative to enum.exe and is used to enumerate data from Windows and Samba hosts. For instance, on Windows, SMB can run directly over TCP/IP without the need for NetBIOS over TCP/IP. enumdomusers Enumerate domain users --------------- ---------------------- rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1013 echoaddone Add one to a number May need to run a second time for success. It may be possible that you are restricted to display any shares of the host machine and when you try to list them it appears as if there aren't any shares to connect to. lsaremoveacctrights Remove rights from an account The command to be used to delete a group using deletedomgroup. 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. 445/tcp open microsoft-ds A collection of commands and tools used for conducting enumeration during my OSCP journey. This command can be used to extract the details regarding the user that the SID belongs. without the likes of: which most likely are monitored by the blue team. 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).
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