The time it takes to detect the average cyberattack has shortened, but cyberattackers are now using more subtle techniques to avoid better defenses, a new study of real incident response engagements shows.

Victim organizations detected attacks in 14 days on average last year, down from 26 days in 2017. Yet, attackers seem to be adapting to evade the greater vigilance: Spam, while up slightly in 2018, continues to account for far less of e-mail volume than during every other year in the past decade, and techniques such as hard-to-detect cryptojacking and low-volume credential spraying are becoming more popular, according to Trustwave’s newly published Global Security Report.