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Elastic Docs ›Elastic Security Solution [7.16] ›Detections and alerts ›Prebuilt rule reference

Startup Folder Persistence via Unsigned Process

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Startup Folder Persistence via Unsigned Process

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Identifies files written or modified in the startup folder by unsigned processes. Adversaries may abuse this technique to maintain persistence in an environment.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*

Severity: medium

Risk score: 41

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
  • Persistence

Version: 2 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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sequence by host.id, process.entity_id with maxspan=5s [process
where event.type in ("start", "process_started") and
process.code_signature.trusted == false and /* suspicious paths can
be added here */ process.executable : ("C:\\Users\\*.exe",
"C:\\ProgramData\\*.exe",
"C:\\Windows\\Temp\\*.exe",
"C:\\Windows\\Tasks\\*.exe",
"C:\\Intel\\*.exe", "C:\\PerfLogs\\*.exe")
] [file where event.type != "deletion" and user.domain != "NT
AUTHORITY" and file.path :
("C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Windows\\Start
Menu\\Programs\\Startup\\*",
"C:\\ProgramData\\Microsoft\\Windows\\Start
Menu\\Programs\\StartUp\\*") ]

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 2 (7.12.0 release)
  • Formatting only
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