Here's a first cut at it. You will need to update your index name, verify each field name is properly spelled and properly capitalized, and test each line to make sure it filters appropriately. Just put |head 10 after the first line for testing, until you've verified all the individual items.
For instance, the regex line will need to be checked to make sure it kills exactly the right records and no others. If it works wrong and you can't figure it out, then get on the Splunk Slack channel, in the #regex subchannel, and ask for help there to get regexes that will match properly.
index=foo sourcetype=WinEventLog EventCode=4769
| fields index Account Client_Address Service_Name Ticket_Encryption_Type
| regex Service_Name!="\$$" AND Ticket_Encryption_Type!="0x12"
| rename COMMENT as "Sort the records into time order, and then check how many different services there are in any one"
| rename COMMENT as "minute time frame, for each Client_Address and for each Account"
| sort 0 _time
| streamstats time_window=1m count as svcCountByCA dc(Service_Name) as dcCountByCA by Client_Address
| streamstats time_window=1m count as svcCountByAc dc(Service_Name) as dcCountByAc by Account
| rename COMMENT as "Mark any records that exceed the thresholds, in this case 3 distinct Service Names, which means at least 3 records as well"
| eval keepme=case(dcCountByCA>=3,"keepme",
dcCountByAc>=3,"keepme")
| rename COMMENT as "For each Account and each Client_Address that hit the threashold, keep all the records for analysis"
| rename COMMENT as "Otherwise throw them all away"
| eventstats max(keepme) as keepme by Client_Address
| eventstats max(keepme) as keepme by Account
| where isnotnull(keepme)
... View more