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Unauthorised USB Device

High Escalated
ALR-00043 · 2026-05-26T21:24:01Z

Description

Unauthorised USB mass storage device connected to AP-WIFI-03 by user 'f.hall'. Device blocked by Endpoint Agent endpoint policy.

Alert Metadata

Alert ID
ALR-00043
Timestamp
2026-05-26T21:24:01Z
Severity
High
Status
Escalated
Detection Source
Endpoint Agent
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
AP-WIFI-03
User Account
f.hall
Source IP
185.170.220.9
Destination IP
10.3.90.56
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

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

Investigation Timeline

21:24:01 Event ingested by SOC365 Engine
21:24:05 EmilyAI triage started — correlation enrichment
21:24:10 EmilyAI confidence: 89% — escalated to human analyst
21:24:30 Alert assigned to analyst: Marcus Webb
21:25:43 Investigation started — querying SIEM and threat intelligence
21:32:11 Containment action taken — endpoint isolated
21:36:08 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00319 16h ago Phishing Email Blocked Medium Investigating AP-WIFI-03
ALR-00415 16h ago Certificate Anomaly Low Resolved AP-WIFI-03
ALR-00386 17h ago Unauthorised USB Device Medium Escalated WS-LAP-010
ALR-00040 18h ago Pass-the-Hash Detected Low False Positive AP-WIFI-03
ALR-00257 1d ago Unauthorised USB Device Informational False Positive AP-WIFI-03