IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Unusual Network Activity from a Windows System Binary
editUnusual Network Activity from a Windows System Binary
editIdentifies network activity from unexpected system applications. This may indicate adversarial activity as these applications are often leveraged by adversaries to execute code and evade detection.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
Severity: medium
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Defense Evasion
Version: 1
Added (Elastic Stack release): 7.10.0
Rule authors: Elastic
Rule license: Elastic License
Rule query
editsequence by process.entity_id with maxspan=5m [process where event.type in ("start", "process_started") and /* known applocker bypasses */ (process.name : "bginfo.exe" or process.name : "cdb.exe" or process.name : "control.exe" or process.name : "cmstp.exe" or process.name : "csi.exe" or process.name : "dnx.exe" or process.name : "fsi.exe" or process.name : "ieexec.exe" or process.name : "iexpress.exe" or process.name : "installutil.exe" or process.name : "Microsoft.Workflow.Compiler.exe" or process.name : "MSBuild.exe" or process.name : "msdt.exe" or process.name : "mshta.exe" or process.name : "msiexec.exe" or process.name : "msxsl.exe" or process.name : "odbcconf.exe" or process.name : "rcsi.exe" or process.name : "regsvr32.exe" or process.name : "xwizard.exe")] [network where (process.name : "bginfo.exe" or process.name : "cdb.exe" or process.name : "control.exe" or process.name : "cmstp.exe" or process.name : "csi.exe" or process.name : "dnx.exe" or process.name : "fsi.exe" or process.name : "ieexec.exe" or process.name : "iexpress.exe" or process.name : "installutil.exe" or process.name : "Microsoft.Workflow.Compiler.exe" or process.name : "MSBuild.exe" or process.name : "msdt.exe" or process.name : "mshta.exe" or process.name : "msiexec.exe" or process.name : "msxsl.exe" or process.name : "odbcconf.exe" or process.name : "rcsi.exe" or process.name : "regsvr32.exe" or process.name : "xwizard.exe")]
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Trusted Developer Utilities Proxy Execution
- ID: T1127
- Reference URL: https://attack.mitre.org/techniques/T1127/