Elastic Security Detection Rules

Potential Execution via FileFix Phishing Attack

Last updated 23 days ago on 2025-08-20
Created 23 days ago on 2025-08-20

About

Identifies the execution of Windows commands or downloaded files via the browser's dialog box. Adversaries may use phishing to instruct the victim to copy and paste malicious commands for execution via crafted phsihing web pages.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: ExecutionTactic: Initial AccessTactic: Defense EvasionData Source: Windows Security Event LogsData Source: Elastic DefendData Source: SysmonData Source: SentinelOneData Source: Microsoft Defender for EndpointLanguage: eql
Severity
high
Risk Score
73
MITRE ATT&CK™

Execution (TA0002)(opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(opens in a new tab or window)

Defense Evasion (TA0005)(opens in a new tab or window)

↳ System Binary Proxy Execution (T1218)(opens in a new tab or window)

Initial Access (TA0001)(opens in a new tab or window)

↳ Phishing (T1566)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.process-*logs-m365_defender.event-*logs-sentinel_one_cloud_funnel.*logs-windows.sysmon_operational-*winlogbeat-*
Related Integrations

endpoint(opens in a new tab or window)

windows(opens in a new tab or window)

sentinel_one_cloud_funnel(opens in a new tab or window)

m365_defender(opens in a new tab or window)

Query
process where host.os.type == "windows" and event.type == "start" and
 process.parent.args == "--message-loop-type-ui" and process.parent.args == "--service-sandbox-type=none" and
 (
  process.name : ("pwsh.exe", "powershell.exe", "curl.exe", "msiexec.exe", "mshta.exe", "wscript.exe", "cscript.exe", "rundll32.exe", "certutil.exe", "certreq.exe") or
  process.executable : "?:\\Users\\*\\Downloads\\*"
  ) and
not (process.name : "rundll32.exe" and process.args : ("ndfapi.dll,NdfRunDllDiagnoseWithAnswerFile", "shwebsvc.dll,AddNetPlaceRunDll"))

Install detection rules in Elastic Security

Detect Potential Execution via FileFix Phishing Attack in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).