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Renamed AutoIt Scripts Interpreter

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Renamed AutoIt Scripts Interpreter

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Identifies a suspicious AutoIt process execution. Malware written as AutoIt scripts tend to rename the AutoIt executable to avoid detection.

Rule type: query

Rule indices:

winlogbeat-*
logs-endpoint.events.*

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

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Rule query

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event.category:process AND event.type:(start OR process_started) AND (
process.pe.original_file_name:/[aA][uU][tT][oO][iI][tT]\d\.[eE][xX][eE
]/ OR winlog.event_data.OriginalFileName:/[aA][uU][tT][oO][iI][tT]\d\.
[eE][xX][eE]/) AND NOT
process.name:/[aA][uU][tT][oO][iI][tT]\d{1,3}\.[eE][xX][eE]/

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Masquerading
- ID: T1036
- Reference URL: https://attack.mitre.org/techniques/T1036/

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