Linux Restricted Shell Breakout via the gcc commandedit

Identifies Linux binary gcc abuse to break out from restricted environments by spawning an interactive system shell. The gcc utility is a complier system for various languages and mainly used to compile C and C++ programs. The activity of spawning shell is not a standard use of this binary for a user or system administrator. It indicates a potentially malicious actor attempting to improve the capabilities or stability of their access.

Rule type: eql

Rule indices:


Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Linux
  • Threat Detection
  • Execution
  • GTFOBins

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule queryedit

process where event.type == "start" and in ("sh", "dash", "bash")  and == "gcc" and process.parent.args == "-wrapper" and
  process.parent.args in ("sh,-s", "bash,-s", "dash,-s", "/bin/sh,-s", "/bin/bash,-s", "/bin/dash,-s")