Clear Linux or Mac System Logs
Adversaries may clear system logs to hide evidence of an intrusion. macOS and Linux both keep track of system or user-initiated actions via system logs. The majority of native system logging is stored under the /var/log/ directory. Subfolders in this directory categorize logs by their related functions, such as: * /var/log/messages:: General and system-related messages * /var/log/secure or /var/log/auth.log: Authentication logs * /var/log/utmp or /var/log/wtmp: Login records * /var/log/kern.log: Kernel logs * /var/log/cron.log: Crond logs * /var/log/maillog: Mail server logs * /var/log/httpd/: Web server access and error logs
Open detection, hunting, mitigation, and evidence workspace
Detection logic
File system monitoring may be used to detect improper deletion or modification of indicator files. Also monitor for suspicious processes interacting with log files.