Persistence via TelemetryController Scheduled Task Hijack

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Persistence via TelemetryController Scheduled Task Hijackedit

Detects the successful hijack of Microsoft Compatibility Appraiser scheduled task to establish persistence with an integrity level of system.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*
  • 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: 101 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guideedit


Rule queryedit

process where event.type == "start" and process.parent.name :
"CompatTelRunner.exe" and process.args : "-cv*" and not process.name
: ("conhost.exe", "DeviceCensus.exe",
"CompatTelRunner.exe", "DismHost.exe",
"rundll32.exe", "powershell.exe")

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 101 (8.5.0 release)
  • Updated query, changed from:

    process where event.type in ("start", "process_started") and
    process.parent.name : "CompatTelRunner.exe" and process.args : "-cv*"
    and not process.name : ("conhost.exe",
    "DeviceCensus.exe", "CompatTelRunner.exe",
    "DismHost.exe", "rundll32.exe",
    "powershell.exe")
Version 9 (8.4.0 release)
  • Formatting only
Version 7 (8.2.0 release)
  • Formatting only
Version 6 (7.16.0 release)
  • Formatting only
Version 5 (7.13.0 release)
  • Updated query, changed from:

    event.category:process and event.type:(start or process_started) and
    process.parent.name:(CompatTelRunner.exe or compattelrunner.exe) and
    process.args:-cv* and not process.name:(conhost.exe or
    DeviceCensus.exe or devicecensus.exe or CompatTelRunner.exe or
    compattelrunner.exe or DismHost.exe or dismhost.exe or rundll32.exe or
    powershell.exe)
Version 4 (7.12.0 release)
  • Formatting only
Version 3 (7.11.2 release)
  • Formatting only
Version 2 (7.11.0 release)
  • Updated query, changed from:

    event.category:process and event.type:(start or process_started) and
    process.parent.name:(CompatTelRunner.exe or compattelrunner.exe) and
    not process.name:(conhost.exe or DeviceCensus.exe or devicecensus.exe
    or CompatTelRunner.exe or compattelrunner.exe or DismHost.exe or
    dismhost.exe or rundll32.exe)