Possible Curl Use on Linux (via process_creation)

This rule detects a curl process start on linux, which suggests a file download from a remote location or a simple web request to a remote server

SigmalowLinuxv1
sigma
title: Possible Curl Use on Linux (via process_creation)
id: 331e2b80-3bba-5827-9c23-93fe66c7378f
status: stable
description: This rule detects a curl process start on linux, which suggests a file download from a remote location or a simple web request to a remote server
references:
    - https://attack.mitre.org/techniques/T1105/
    - https://www.trendmicro.com/en_us/research/22/i/how-malicious-actors-abuse-native-linux-tools-in-their-attacks.html
author: Huntrule Team
date: 2026-07-03
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/curl'
    condition: selection
falsepositives:
    - Unknown
level: low

Known false positives

  • Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.