Insider threats
Unusual desktop names
This occurs when the user attempts to launch a desktop that is not considered usual.
Details
Data Source: Apps and Desktops (Workspace App)
CAS query
Event-Type = "Session.Logon" AND Session-Launch-Type = "desktop" AND App-Name ~ "<Desktop Name>"
Sigma signature
author: Citrix
date: 2023/01/31
description: Unusual desktop names
detection:
condition: selection1 and selection2 and not filter_null and filter_app_name
filter_app_name:
- app_name|contains: '<App Name>'
filter_null:
- app_name: null
selection1:
- occurrence_event_type: Citrix.EventMonitor.AppStart
selection2:
- launch_type: 'desktop'
logsource:
product: citrixanalytics
service: security
title: Unusual desktop names
Monitor specific process
This occurs when the user launches a published application that is in the watch list. The purpose could be to monitor the usage of specific published applications.
Details
Data Source: Apps and Desktops (Session Recording)
CAS query
Event-Type = "Citrix.EventMonitor.AppStart" AND App-Name IN ("<App-Name-1>", "<App-Name-2>")
Sigma signature
author: Citrix
date: 2023/01/31
description: Monitor specific process
detection:
condition: selection and not filter_null and filter_app_name
filter_app_name:
- app_name: ['<App-Name1>', '<App-Name2>']
filter_null:
- app_name: null
selection:
- occurrence_event_type: Citrix.EventMonitor.AppStart
logsource:
product: citrixanalytics
service: security
title: Monitor specific process
Unauthorized virtual apps
This occurs when the user accesses unauthorized virtual apps.
Details
Data Source: Apps and Desktops (Workspace App)
CAS query
Event-Type = "App.Start" AND App-Name IN ("<App-Name1>", "<App-Name2>")
Sigma signature
date: 2023/01/31
description: Unauthorized virtual apps
detection:
condition: selection and not filter_null and filter_app_name
filter_app_name:
- app_name: ['<App-Name1>', '<App-Name2>']
filter_null:
- app_name: null
selection:
- occurrence_event_type: App.Start
logsource:
product: citrixanalytics
service: security
title: Unauthorized virtual apps