Definition(s)
Precursor
An observable occurrence or sign that an attacker may be preparing to cause an incident.
Adapted from: CNSSI 4009, NIST SP 800-61 Rev 2 (DRAFT).
Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards