Find pattern on multiple lines within BIG log files

To investigate within logs, I am trying to find the very first time a vulnerability in a workflow has been exploited. The pattern is on multiple lines. The pattern would be AAAAAAAAA BBBBBBBBB CCCCCCCCC The problem is that AAAAAAAAA or BBBBBBBBB or CCCCCCCCC Can be found anywhere indivdually in the log without showing the vulnerability; it is the exact pattern in this exact order that will help me. For example grep -Ei "AAAAAAAAA|BBBBBBBBB|CCCCCCCCC" logfile does not help me since all the lines with individual occurence of AAAAAAAAA BBBBBBBBB CCCCCCCCC will be there. How can I solve this?