06-15-2020 01:53 PM
FP means False Positive.
A False Positive happens when a signature triggers for benign traffic.
For Palo Alto Networks firewalls there are three common types of False Positives.
1) WildFire False Positive: WildFire arrives at an incorrect verdict, assigning a malicious verdict to a benign file. The general resolution is to identify what caused the incorrect verdict, then flip it to Benign.
2) Antivirus Collision with False Positive: This happens when a Benign file triggers a signature that was created for a file that WildFire assigned an incorrect malicious verdict (as described in #1). The reason for this is that the digital patterns that the Palo Alto Networks parses to identify a Malicious sample coincide in those found in the Benign sample. The general resolution is to identify what is the original sample that created the signature and identify what caused the incorrect verdict, then flip it to Benign.
3) Antivirus Collision with True Positive: This happens when a Benign file triggers a signature that was created for a file that WildFire correctly identified as malicious. The reason for this is that the digital patterns that the Palo Alto Networks parses to identify a Malicious sample coincide in those found in the Benign sample. The general resolution for these is to place an Antivirus Exception.
