huntrule

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

Related detections9 linkedT1190 — drag to rearrange
Malicious SharePoint ToolShell Post-Exploitation via Encoded PowerShell (via process_creation)
Malicious Web Shell Written to SharePoint LAYOUTS Directory by Worker Process (via file_event)
Malicious MS-SQL Server Spawning Command Shell via Mallox
Malicious ActiveMQ CVE-2023-46604 Payload Download via curl or wget
Malicious WordPress Core SQL Injection Scanner via User-Agent
Malicious Command Shell Spawned by SQL Server via Process Creation (via process_creation)
Malicious Command Shell or PowerShell Spawned by Tomcat via Process Creation (via process_creation)
Suspicious Shell Script Execution From Temp Directory on SonicWall SMA1000 Appliance (via process_creation)
Possible TP-Link Command Injection via WlanNetworkRpm Endpoint (via webserver)
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.