Change Default File Association

Detect changes to default File Association handlers.

id:26f0ebab-b315-492d-a5be-aa665fba2f35
categories:hunt
confidence:medium
os:windows
created:11/30/2018
updated:11/30/2018

MITRE ATT&CK™ Mapping

tactics:Persistence
techniques:T1042 Change Default File Association

Query

sequence by unique_pid with maxspan=1s
    [ registry where key_path == "*\\SOFTWARE\\Classes\\*\\*"]
    [ registry where key_path == "*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\GlobalAssocChangedCounter"]

| unique_count process_name, key_path

Contributors