Linux Download-and-Execute One-liner
highLinuxSingle eventexperimentalsigma.linux_download_and_exec · v1.0.0
What it detects
curl/wget piped to a shell or a chmod+x in /tmp — staging payloads
MITRE ATT&CK mapping
- T1105Ingress Tool Transfer· Command and Control
False positives and triage
Converted from Sigma; review before enabling.
The rule
Declarative YAML read by the detection engine — data, never executed. Confidence 70%. Source: rules/sigma/sigma.linux_download_and_exec.yaml, licensed under the Detection Rule License 1.1.
id: sigma.linux_download_and_exec
version: 1.0.0
status: experimental
severity: high
confidence: 0.7
platforms:
- linux
mitre_techniques:
- T1105
description: curl/wget piped to a shell or a chmod+x in /tmp — staging payloads (Sigma sample)
match:
event_category: process
raw_message_contains_any:
- curl -s http
- wget -q http
- chmod +x /tmp/
- '| bash'
- '| sh -'
false_positive_guidance: Converted from Sigma; review before enabling.
Adapted from the SigmaHQ rule “Linux Download-and-Execute One-liner”, distributed under the Detection Rule License 1.1. SigmaHQ.
Related detections
Run this rule on your own logs — offline
KIROSEC runs this rule and the rest of the library over Windows, Linux, macOS and cloud audit logs on the analyst's own machine. Every alert links to the events that raised it, and nothing leaves the device.