Tools / Cyber Security Interview Questions
Which is better and why: Signature-based or Behavior-based Malware Detection?
| Signature-based | Behavior-based |
| Matches files against a database of known malware fingerprints | Watches what a program actually does at runtime |
| Fast and low false-positive rate for known threats | Can catch previously unseen, zero-day malware |
| Blind to new or modified malware not yet in the database | Higher risk of false positives on unusual but legitimate software |
| Requires frequent signature updates | Requires baseline profiling and tuning |
Neither approach is strictly better in isolation. Signature-based detection is efficient and reliable against known, widespread threats, while behavior-based detection is essential for catching zero-day and fileless malware that has no signature yet. Most modern endpoint protection platforms layer both together rather than choosing one over the other.
Which detection method can catch previously unseen, zero-day malware?
What is a downside of behavior-based detection?
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