An adversary may attempt to block indicators or events typically captured by sensors from being gathered and analyzed. This could include maliciously redirecting (Citation: Microsoft Lamin Sept 2017) or even disabling host-based sensors, such as Event Tracing for Windows (ETW),(Citation: Microsoft About Event Tracing 2018) by tampering settings that control the collection and flow of event telemetry. (Citation: Medium Event Tracing Tampering 2018) These settings may be stored on the system in configuration files and/or in the Registry as well as being accessible via administrative utilities such as PowerShell or Windows Management Instrumentation.
ETW interruption can be achieved multiple ways, however most directly by defining conditions using the PowerShell <code>Set-EtwTraceProvider</code> cmdlet or by interfacing directly with the Registry to make alterations.
In the case of network-based reporting of indicators, an adversary may block traffic associated with reporting to prevent central analysis. This may be accomplished by many means, such as stopping a local process responsible for forwarding telemetry and/or creating a host-based firewall rule to block traffic to specific hosts responsible for aggregating events, such as security information and event management (SIEM) products.
View in MITRE ATT&CK®| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| linux_auditd_alerts_and_log_analytics_agent_integration | Linux auditd alerts and Log Analytics agent integration | technique_scores | T1562.006 | Indicator Blocking |
Comments
This control may alert on activity which disables auditd logging on Linux endpoints. The auditd package may not be the only logging system being utilized and this control may not alert on activity that disables other logging software.
References
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| azure_sentinel | Azure Sentinel | technique_scores | T1562.006 | Indicator Blocking |
Comments
The Azure Sentinel Hunting "Azure Sentinel Analytics Rules Administrative Operations" query can identify potential attempts to impair defenses by changing or deleting detection analytics.
The Azure Sentinel Analytics "Azure DevOps - Retention Reduced to Zero" query can identify that an adversary is looking to reduce their malicious activity's footprint by preventing retention of artifacts. Control is specific to indicators produced by Azure DevOps. The coverage for these queries is minimal resulting in an overall Minimal score.
References
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| file_integrity_monitoring | File Integrity Monitoring | technique_scores | T1562.006 | Indicator Blocking |
Comments
There are numerous ways depending on the operating system that these sub-techniques can be accomplished. Monitoring the Windows Registry is one way depending on the procedure chosen to implement the sub-technique and therefore the overall coverage is low.
References
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