From the computer's log checker summary

Active System Attack Alerts
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Sep 19 06:52:53 faure kernel: crack-attack[32276]: 
segfault at 0101010d eip 08059360 esp bfe66f20 error 6

The email came with the subject

ACTIVE SYSTEM ATTACK!

Crack attack is - of course a game which crashed on me and the report is in the system log, the report matching an attack rather nicely! Gave me an exciting moment though