Persistence via Microsoft Office AddInsedit
Detects attempts to establish persistence on an endpoint by abusing Microsoft Office add-ins.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
- logs-windows.*
Severity: high
Risk score: 73
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
- Persistence
Version: 100 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
file where event.type != "deletion" and file.extension :
("wll","xll","ppa","ppam","xla","xlam") and file.path : (
"C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Word\\Startup\\*",
"C:\\Users\\*\\AppData\\Roaming\\Microsoft\\AddIns\\*",
"C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Excel\\XLSTART\\*" )
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
-
Technique:
- Name: Office Application Startup
- ID: T1137
- Reference URL: https://attack.mitre.org/techniques/T1137/
Rule version historyedit
- Version 100 (8.5.0 release)
-
- Formatting only
- Version 6 (8.4.0 release)
-
- Formatting only
- Version 4 (8.2.0 release)
-
- Formatting only
- Version 3 (7.12.0 release)
-
-
Updated query, changed from:
file where event.type != "deletion" and wildcard(file.extension,"wll","xll","ppa","ppam","xla","xlam") and wildcard(file.path, "C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Word\\Startup\\*", "C:\\Users\\*\\AppData\\Roaming\\Microsoft\\AddIns\\*", "C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Excel\\XLSTART\\*")
-
- Version 2 (7.11.2 release)
-
- Formatting only