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Windows Process Creation: Commvault qlogin Argument Injection Indicators for Auth Bypass

Alerts on Windows command lines running Commvault qlogin with -localadmin-related markers consistent with argument injection.

FreeReviewedSigma · High · v5
Product
windows
Category
process_creation
Author
X__Junior (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2025-10-20
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 flags Windows process creation events where the Commvault qlogin command line contains a specific cluster of parameters and markers indicative of argument injection. An attacker can abuse crafted input to inject a -localadmin parameter via the password field, aiming to bypass authentication and obtain a privileged token. The detection relies on process creation telemetry and matches on the presence of qlogin plus specific command-line substrings.

Reporting behind it

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Windows Process Creation: Commvault qlogin Argument Injection Indicators for Auth Bypass
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.