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Unauthorised USB Device

Low Investigating
ALR-00311 · 2026-05-25T10:45:58Z

Description

Unauthorised USB mass storage device connected to SRV-SQL-01 by user 'e.evans'. Device blocked by SOC365 Engine endpoint policy.

Alert Metadata

Alert ID
ALR-00311
Timestamp
2026-05-25T10:45:58Z
Severity
Low
Status
Investigating
Detection Source
SOC365 Engine
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-SQL-01
User Account
e.evans
Source IP
194.9.62.204
Destination IP
10.3.80.50
Origin Country
US United States

MITRE ATT&CK Mapping

Tactic
Initial Access
Technique
T1091
Reference
attack.mitre.org/techniques/T1091

Investigation Timeline

10:45:58 Event ingested by SOC365 Engine
10:46:03 EmilyAI triage started — correlation enrichment
10:46:09 EmilyAI confidence: 90% — escalated to human analyst
10:46:25 Alert assigned to analyst: EmilyAI (auto)
10:48:31 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00153 34m ago Unauthorised USB Device Informational Investigating WS-PC-003
ALR-00485 53m ago Credential Stuffing Attempt Medium Open SRV-SQL-01
ALR-00413 1h ago Unauthorised USB Device Medium Resolved WS-PC-001
ALR-00474 3h ago Unauthorised USB Device Informational Escalated SRV-DC-01
ALR-00423 4h ago Kerberoasting Attempt Medium Investigating SRV-SQL-01