CrackMapExec

Once we have successfully authenticated as a user in the network, it's time for us to dig deeper using our access. We can now enumerate the domain in depth.

We are interested in information about domain user and computer attributes, grouip membership, Group Policy Objects, permissions, Access-Control lists (ACLs), trusts, and more.

IMPORTANT: We have a variety of tools we can use but they WONT work without valid domain user credentials at any permission level. So at minimum, we will have to have acquired a user's cleartext password, NTLM password has, or SYSTEM access on a domain-joined host.

CrackMapExec

CrackMapExec (CME) is a powerful toolset to help with assessing AD environments.

CME offers a help menu for each protocol (i.e., crackmapexec winrm -h, etc.)

  • -u Username The user whose credentials we will use to authenticate

  • -p Password User's password

  • Target (IP or FQDN) Target host to enumerate (in our case, the Domain Controller)

  • --users Specifies to enumerate Domain Users

  • --groups Specifies to enumerate domain groups

  • --loggedon-users Attempts to enumerate what users are logged on to a target, if any

Domain User Enumeration

attacker@kali$ sudo crackmapexec smb 172.16.5.5 -u forend -p Klmcargo2 --users

SMB         172.16.5.5      445    ACADEMY-EA-DC01  [*] Windows 10.0 Build 17763 x64 (name:ACADEMY-EA-DC01) (domain:INLANEFREIGHT.LOCAL) (signing:True) (SMBv1:False)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] INLANEFREIGHT.LOCAL\forend:Klmcargo2 
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] Enumerated domain user(s)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\administrator                  badpwdcount: 0 baddpwdtime: 2022-03-29 12:29:14.476567
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\guest                          badpwdcount: 0 baddpwdtime: 1600-12-31 19:03:58
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\lab_adm                        badpwdcount: 0 baddpwdtime: 2022-04-09 23:04:58.611828
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\krbtgt                         badpwdcount: 0 baddpwdtime: 1600-12-31 19:03:58
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\htb-student                    badpwdcount: 0 baddpwdtime: 2022-03-30 16:27:41.960920
SMB         172.16.5.5      445    ACADEMY-EA-DC01  INLANEFREIGHT.LOCAL\avazquez                       badpwdcount: 3 baddpwdtime: 2022-02-24 18:10:01.903395

Domain Group Enumeration

attacker@kali$ sudo crackmapexec smb 172.16.5.5 -u forend -p Klmcargo2 --groups
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [*] Windows 10.0 Build 17763 x64 (name:ACADEMY-EA-DC01) (domain:INLANEFREIGHT.LOCAL) (signing:True) (SMBv1:False)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] INLANEFREIGHT.LOCAL\forend:Klmcargo2 
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] Enumerated domain group(s)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Administrators                           membercount: 3
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Users                                    membercount: 4
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Guests                                   membercount: 2
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Print Operators                          membercount: 0
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Backup Operators                         membercount: 1
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Replicator                               membercount: 0

<SNIP>

SMB         172.16.5.5      445    ACADEMY-EA-DC01  Domain Admins                            membercount: 19
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Domain Users                             membercount: 0

<SNIP>

SMB         172.16.5.5      445    ACADEMY-EA-DC01  Contractors                              membercount: 138
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Accounting                               membercount: 15
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Engineering                              membercount: 19
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Executives                               membercount: 10
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Human Resources                          membercount: 36

Logged On Users

attacker@kali$ sudo crackmapexec smb 172.16.5.130 -u forend -p Klmcargo2 --loggedon-users

SMB         172.16.5.130    445    ACADEMY-EA-FILE  [*] Windows 10.0 Build 17763 x64 (name:ACADEMY-EA-FILE) (domain:INLANEFREIGHT.LOCAL) (signing:False) (SMBv1:False)
SMB         172.16.5.130    445    ACADEMY-EA-FILE  [+] INLANEFREIGHT.LOCAL\forend:Klmcargo2 (Pwn3d!)
SMB         172.16.5.130    445    ACADEMY-EA-FILE  [+] Enumerated loggedon users
SMB         172.16.5.130    445    ACADEMY-EA-FILE  INLANEFREIGHT\clusteragent              logon_server: ACADEMY-EA-DC01
SMB         172.16.5.130    445    ACADEMY-EA-FILE  INLANEFREIGHT\lab_adm                   logon_server: ACADEMY-EA-DC01
SMB         172.16.5.130    445    ACADEMY-EA-FILE  INLANEFREIGHT\svc_qualys                logon_server: ACADEMY-EA-DC01
SMB         172.16.5.130    445    ACADEMY-EA-FILE  INLANEFREIGHT\wley                      logon_server: ACADEMY-EA-DC01

CME Share Searching

We can use the --shares flag to enumerate available shares on the remote host and the level of access our user account has to each share (READ or WRITE access).

Share Enumeration - Domain Controller

attacker@kali$ sudo crackmapexec smb 172.16.5.1/24 -u users.txt -p passwords.txt --shares --continue-on-success

SMB         172.16.5.5      445    ACADEMY-EA-DC01  [*] Windows 10.0 Build 17763 x64 (name:ACADEMY-EA-DC01) (domain:INLANEFREIGHT.LOCAL) (signing:True) (SMBv1:False)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] INLANEFREIGHT.LOCAL\forend:Klmcargo2 
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] Enumerated shares
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Share           Permissions     Remark
SMB         172.16.5.5      445    ACADEMY-EA-DC01  -----           -----------     ------
SMB         172.16.5.5      445    ACADEMY-EA-DC01  ADMIN$                          Remote Admin
SMB         172.16.5.5      445    ACADEMY-EA-DC01  C$                              Default share
SMB         172.16.5.5      445    ACADEMY-EA-DC01  Department Shares READ            
SMB         172.16.5.5      445    ACADEMY-EA-DC01  IPC$            READ            Remote IPC
SMB         172.16.5.5      445    ACADEMY-EA-DC01  NETLOGON        READ            Logon server share 
SMB         172.16.5.5      445    ACADEMY-EA-DC01  SYSVOL          READ            Logon server share 
SMB         172.16.5.5      445    ACADEMY-EA-DC01  User Shares     READ            
SMB         172.16.5.5      445    ACADEMY-EA-DC01  ZZZ_archive     READ

Spider_plus

The module spider_plus will dig through each readable share on the host and list all readable files. Let's give it a try.\

attacker@kali$ sudo crackmapexec smb 172.16.5.5 -u forend -p Klmcargo2 -M spider_plus --share 'Department Shares'

SMB         172.16.5.5      445    ACADEMY-EA-DC01  [*] Windows 10.0 Build 17763 x64 (name:ACADEMY-EA-DC01) (domain:INLANEFREIGHT.LOCAL) (signing:True) (SMBv1:False)
SMB         172.16.5.5      445    ACADEMY-EA-DC01  [+] INLANEFREIGHT.LOCAL\forend:Klmcargo2 
SPIDER_P... 172.16.5.5      445    ACADEMY-EA-DC01  [*] Started spidering plus with option:
SPIDER_P... 172.16.5.5      445    ACADEMY-EA-DC01  [*]        DIR: ['print$']
SPIDER_P... 172.16.5.5      445    ACADEMY-EA-DC01  [*]        EXT: ['ico', 'lnk']
SPIDER_P... 172.16.5.5      445    ACADEMY-EA-DC01  [*]       SIZE: 51200
SPIDER_P... 172.16.5.5      445    ACADEMY-EA-DC01  [*]     OUTPUT: /tmp/cme_spider_plus

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