Cisco ASA - Logging Filters Configuration Tampering
This analytic detects tampering with logging filter configurations on Cisco ASA devices via CLI or ASDM. Adversaries may reduce logging levels or disable specific log categories to evade detection, hide their…
Description
This analytic detects tampering with logging filter configurations on Cisco ASA devices via CLI or ASDM. Adversaries may reduce logging levels or disable specific log categories to evade detection, hide their activities, or prevent security monitoring systems from capturing evidence of their actions. By lowering logging verbosity, attackers can operate with reduced visibility to security teams. The detection monitors for logging configuration commands (message ID 111008 or 111010) that modify logging destinations (asdm, console, history, mail, monitor, trap) without setting them to higher severity levels (5-notifications, 6-informational, 7-debugging), which may indicate an attempt to reduce logging verbosity. Investigate unauthorized logging configuration changes that reduce verbosity, especially changes performed by non-administrative accounts, during unusual hours, or without corresponding change management approval.
Detection logic
Detection requirements
- Platform
- ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source category
- cisco_asa_logs
Known benign triggers
- Admins may modify logging levels during maintenance or troubleshooting to reduce log volume. Verify against change management tickets. Filter known admin accounts during maintenance windows.
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| www.cisco.com/c/en/us/td/docs/security/asa/asa-cli-reference/I-R/asa-command-ref-I-R/m_log-lz.html | Only this detection cites it |
From the source
- At source
- Open at source
- Upstream identifier
- b87b48a8-6d1a-4280-9cf1-16a950dbf901
- Tagged by the source as
- Suspicious Cisco Adaptive Security Appliance ActivityNetworkapplicationSplunk CloudSplunk EnterpriseSplunk Enterprise Securitynetwork
Licence
- Published under
- Apache License 2.0Read the licence
- Attribution
- Required
- Obtained under
- Apache-2.0Read the origin licence
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1