Execution via local SxS Shared Module
editExecution via local SxS Shared Module
editIdentifies the creation, change, or deletion of a DLL module within a Windows SxS local folder. Adversaries may abuse shared modules to execute malicious payloads by instructing the Windows module loader to load DLLs from arbitrary local paths.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
Severity: medium
Risk score: 43
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Execution
Version: 2 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 7.11.2
Rule authors: Elastic
Rule license: Elastic License
Investigation guide
editThe SxS DotLocal folder is a legitimate feature that can be abused to hijack standard modules loading order by forcing an executable on the same application.exe.local folder to load a malicious DLL module from the same directory.
Rule query
editfile where file.extension : "dll" and file.path : "C:\\*\\*.exe.local\\*.dll"
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Shared Modules
- ID: T1129
- Reference URL: https://attack.mitre.org/techniques/T1129/
Rule version history
edit- Version 2 (7.11.2 release)
-
- Formatting only