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Unauthorised USB Device

Medium Open
ALR-00189 · 2026-10-11T18:12:31Z

Description

Unauthorised USB mass storage device connected to SRV-BACKUP-01 by user 'a.wilson'. Device blocked by Firewall endpoint policy.

Alert Metadata

Alert ID
ALR-00189
Timestamp
2026-10-11T18:12:31Z
Severity
Medium
Status
Open
Detection Source
Firewall
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
SRV-BACKUP-01
User Account
a.wilson
Source IP
194.138.62.51
Destination IP
10.2.78.205
Origin Country
CN China

MITRE ATT&CK Mapping

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

Investigation Timeline

18:12:31 Event ingested by SOC365 Engine
18:12:35 EmilyAI triage started — correlation enrichment
18:12:41 EmilyAI confidence: 82% — escalated to human analyst
18:12:51 Alert assigned to analyst: Marcus Webb
18:14:52 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00443 1h ago Privilege Escalation Attempt Medium Investigating SRV-BACKUP-01
ALR-00347 1h ago Anomalous DNS Query Informational Resolved SRV-BACKUP-01
ALR-00417 6h ago Port Scan Detected Low Investigating SRV-BACKUP-01
ALR-00467 9h ago Unauthorised USB Device Informational Resolved WS-LAP-010
ALR-00409 16h ago Unauthorised USB Device Medium Investigating WS-LAP-011