Suspicious Execution via Scheduled Task

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Identifies execution of a suspicious program via scheduled tasks by looking at process lineage and command line usage.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*
  • logs-windows.*

Severity: medium

Risk score: 47

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:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Persistence

Version: 7

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where event.type == "start" and
    /* Schedule service cmdline on Win10+ */
    process.parent.name : "svchost.exe" and process.parent.args : "Schedule" and
    /* add suspicious programs here */
    process.pe.original_file_name in
                                (
                                  "cscript.exe",
                                  "wscript.exe",
                                  "PowerShell.EXE",
                                  "Cmd.Exe",
                                  "MSHTA.EXE",
                                  "RUNDLL32.EXE",
                                  "REGSVR32.EXE",
                                  "MSBuild.exe",
                                  "InstallUtil.exe",
                                  "RegAsm.exe",
                                  "RegSvcs.exe",
                                  "msxsl.exe",
                                  "CONTROL.EXE",
                                  "EXPLORER.EXE",
                                  "Microsoft.Workflow.Compiler.exe",
                                  "msiexec.exe"
                                  ) and
    /* add suspicious paths here */
    process.args : (
       "C:\\Users\\*",
       "C:\\ProgramData\\*",
       "C:\\Windows\\Temp\\*",
       "C:\\Windows\\Tasks\\*",
       "C:\\PerfLogs\\*",
       "C:\\Intel\\*",
       "C:\\Windows\\Debug\\*",
       "C:\\HP\\*")

Framework: MITRE ATT&CKTM