IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Downloaded Shortcut Filesedit
Identifies .lnk shortcut file downloaded from outside the local network. These shortcut files are commonly used in phishing campaigns.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
- logs-windows.*
Severity: low
Risk score: 21
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Execution
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
/* leaving in development pending `file.Ext.windows.zone_identifier` landing in ECS then endpoint */
sequence by process.entity_id with maxspan=2s
/* file.extension added to endpoint fields for 7.10 */
[file where host.os.type == "windows" and event.type == "creation" and file.extension == "lnk"]
/* not sure yet how the update will capture ADS */
[file where host.os.type == "windows" and event.type == "creation" and file.extension == "lnk:Zone.Identifier" and
/* non-ECS field - may disqualify conversion */
file.Ext.windows.zone_identifier > 1]
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: User Execution
- ID: T1204
- Reference URL: https://attack.mitre.org/techniques/T1204/
-
Sub-technique:
- Name: Malicious File
- ID: T1204.002
- Reference URL: https://attack.mitre.org/techniques/T1204/002/
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Phishing
- ID: T1566
- Reference URL: https://attack.mitre.org/techniques/T1566/
-
Sub-technique:
- Name: Spearphishing Attachment
- ID: T1566.001
- Reference URL: https://attack.mitre.org/techniques/T1566/001/
-
Sub-technique:
- Name: Spearphishing Link
- ID: T1566.002
- Reference URL: https://attack.mitre.org/techniques/T1566/002/