extract a string from variable text

Dear Experts

I would like to define a excel IS number (SEARCH) formaula to help me fetch a specified string from the variable alerts like this one

T1133
T1071.001

From variable alerts rows like some time alerts are with _ some time the string start after a SPACE and some its under Brackets ()

mitre_T1071.001 Communication with known Bad ip's
mitre T1110.003 Multiple Users Attempting To Authenticate Using Explicit Credentials
mitre_t1033_1 System User Discovery Net Commands/Alert
Network Sniffing 2 (MITRE 1040) /Alert

can you create a Search Is number formula that extract the T1133 as single number as well with dots from variable alerts name ?

e.g. a formula that search MITRE with _ with () and with dots and copy the adjacent value in the next columns as T1133.001 or T1133
=IF(ISNUMBER(SEARCH("MITRE"