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Elastic Docs ›Elastic Security Solution [8.16] ›Detections and alerts ›Prebuilt rule reference

Suspicious Execution - Short Program Name

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Suspicious Execution - Short Program Name

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Identifies process execution with a single character process name. This is often done by adversaries while staging or executing temporary utilities.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion
  • Elastic Endgame

Version: 102 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 8.6.0

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 length(process.name) > 0 and
length(process.name) == 5 and host.os.name == "Windows" and
length(process.pe.original_file_name) > 5











Threat mapping
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Framework: MITRE ATT&CKTM














Rule version history
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Version 102 (8.6.0 release)








    

  • 
Formatting only

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Version 101 (8.5.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    process where event.type in ("start", "process_started") and
length(process.name) > 0 and length(process.name) == 5 and
host.os.name == "Windows" and length(process.pe.original_file_name) >
5
    

    

    • 









Version 6 (8.4.0 release)








    

  • 
Formatting only

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Version 4 (8.2.0 release)








    

  • 
Formatting only

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Version 3 (7.12.0 release)








    

  • 
Formatting only

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Version 2 (7.11.2 release)








    

  • 
Formatting only

    • 




















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