Detection rules › Sigma
Curl.EXE Execution
Detects a curl process start on Windows, which could indicates a file download from a remote location or a simple web request to a remote server
Known false positives
- Scripts created by developers and admins
- Administrative activity
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Command & Control |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Curl.EXE Execution
id: bbeaed61-1990-4773-bf57-b81dbad7db2d
related:
- id: e218595b-bbe7-4ee5-8a96-f32a24ad3468 # Suspicious curl execution
type: derived
status: test
description: Detects a curl process start on Windows, which could indicates a file download from a remote location or a simple web request to a remote server
references:
- https://web.archive.org/web/20200128160046/https://twitter.com/reegun21/status/1222093798009790464
author: Florian Roth (Nextron Systems)
date: 2022-07-05
modified: 2023-02-21
tags:
- attack.command-and-control
- attack.t1105
- detection.threat-hunting
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\curl.exe'
- Product: 'The curl executable'
condition: selection
falsepositives:
- Scripts created by developers and admins
- Administrative activity
level: low
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
- Image|endswith: '\curl.exe'
- Product: 'The curl executable'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\curl.exe" |
Product | eq |
| field:"Product" kind:eq value:"The curl executable" |