Find sigma rule 
Attack: Impair Defenses: Disable or Modify Linux Audit System
Adversaries may disable or modify the Linux audit system to hide malicious activity and avoid detection. Linux admins use the Linux Audit system to track security-relevant information on a system. The Linux Audit system operates at the kernel-level and maintains event logs on application and system activity such as process, network, file, and login events based on pre-configured rules.
Often referred to as auditd, this is the name of the daemon used to write events to disk and is governed by the parameters set in the audit.conf configuration file. Two primary ways to configure the log generation rules are through the command line auditctl utility and the file /etc/audit/audit.rules, containing a sequence of auditctl commands loaded at boot time.(Citation: Red Hat System Auditing)(Citation: IzyKnows auditd threat detection 2022)
With root privileges, adversaries may be able to ensure their activity is not logged through disabling the Audit system service, editing the configuration/rule files, or by hooking the Audit system library functions. Using the command line, adversaries can disable the Audit system service through killing processes associated with auditd daemon or use systemctl to stop the Audit service. Adversaries can also hook Audit system functions to disable logging or modify the rules contained in the /etc/audit/audit.rules or audit.conf files to ignore malicious activity.(Citation: Trustwave Honeypot SkidMap 2023)(Citation: ESET Ebury Feb 2014)
MITRE
Tactic
- defense-evasion
technique
- T1562.012
Test : Disable auditd using auditctl
OS
- linux
Description:
The command auditctl -e 0 disables the audit system. By setting the parameter to 0, auditing is deactivated, halting the monitoring and recording of security-related events. This action stops the generation of audit logs, ceasing the collection of data regarding system activities. Disabling auditing may be done for various reasons, such as troubleshooting, performance optimization, or temporarily suspending auditing requirements, but it reduces visibility into system events and can impact security monitoring and compliance efforts.
Executor
sh