Detection rules › Elastic
Renamed AutoIt Scripts Interpreter
Identifies suspicious AutoIT process execution events. Attackers may rename an AutoIT executable file in an attempt to avoid signature-based detection.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Rule body
[rule]
description = """
Identifies suspicious AutoIT process execution events. Attackers may rename an AutoIT executable file in an attempt to
avoid signature-based detection.
"""
id = "99f2327e-871f-4b8a-ae75-d1c4697aefe4"
license = "Elastic License v2"
name = "Renamed AutoIt Scripts Interpreter"
os_list = ["windows"]
version = "1.0.32"
query = '''
process where event.action == "start" and
process.pe.original_file_name : "AutoIt*.exe" and not process.name : "AutoIt*.exe" and
not process.executable : "?:\\Program Files (x86)\\AutoIt3\\AutoIt3.exe"
'''
min_endpoint_version = "7.15.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
tree = true
[[optional_actions]]
action = "rollback"
field = "process.entity_id"
state = 0
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"
[[threat.technique.subtechnique]]
id = "T1036.003"
name = "Rename Legitimate Utilities"
reference = "https://attack.mitre.org/techniques/T1036/003/"
[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[internal]
min_endpoint_version = "7.15.0"
Stages and Predicates
Stage 1: process
process where event.action == "start" and
process.pe.original_file_name : "AutoIt*.exe" and not process.name : "AutoIt*.exe" and
not process.executable : "?:\\Program Files (x86)\\AutoIt3\\AutoIt3.exe"
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
process.executable | eq | ?:\Program Files (x86)\AutoIt3\AutoIt3.exe | excludes:process.executable field:"process.executable" value:"?:\Program Files (x86)\AutoIt3\AutoIt3.exe" |
process.name | wildcard | AutoIt*.exe | excludes:process.name field:"process.name" value:"AutoIt*.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
event.action | eq |
| field:"EventType" kind:eq value:"start" |
process.pe.original_file_name | wildcard |
| field:"OriginalFileName" kind:wildcard value:"AutoIt*.exe" |