huntrule

Linux Process Command-Line Indicators of Apache Spark Shell Command Injection Attempt

Alerts on Linux process creation where a bash-spawned command line contains `id -Gn ` injection-like backtick or quote patterns.

FreeReviewedSigma · High · v5
Product
linux
Category
process_creation
Author
Nasreddine Bencherchali (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2022-07-20
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Initial Access

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule identifies Linux process creation events where a parent shell process launches a command containing shell substitution patterns tied to executing the `id -Gn` command. Attackers can use Spark shell command injection to run arbitrary commands on the host, so these command-line constructs are strong signals of exploitation attempts. The detection relies on process creation telemetry, specifically the parent process image name and the child process command line contents.

Reporting behind it

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Linux Process Command-Line Indicators of Apache Spark Shell Command Injection Attempt
Pivot detection · T1190 · 9 related

Changelog

v5
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. v1
    No changelog recorded for this version.2026-07-30

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