Suspicious PowerShell Spawned by Komari Monitoring Agent

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1219Remote Access Tools
Exfiltration
Impact

What it detects

This rule detects the komari-agent binary spawning PowerShell, the built-in reverse shell behavior of the Komari monitoring tool abused in a Huntress-investigated intrusion. The agent was installed as a NSSM service masquerading as Windows Update Service and used its embedded shell for command execution. A monitoring agent launching an interactive interpreter reflects abuse of its reverse shell capability.

Reporting behind it

Related detections9 linkedT1219 — drag to rearrange

Suspicious PowerShell Spawned by ScreenConnect Remote Access Client

Suspicious PowerShell Spawned by VBScript for RMM Delivery

Malicious Command Shell Spawned by Bomgar Remote Support Client

Suspicious Node Package Install Spawning Script Interpreters via process_creation

Suspicious Winpty Agent Spawned by Net Monitor Employee Monitoring Process

Suspicious SolarWinds Web Help Desk Java Process Spawning Command Shell

Suspicious Velociraptor DFIR Agent Deployed as Service

Malicious mshta Spawning PowerShell Loader via ClickFix

Suspicious Velociraptor DFIR Agent Spawning Encoded PowerShell

Suspicious PowerShell Spawned by Komari Monitoring Agent

Pivot detection · T1219 · 9 related

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

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →