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Unauthorised USB Device

Medium Investigating
ALR-00375 · 2026-04-07T18:52:43Z

Description

Unauthorised USB mass storage device connected to WS-PC-001 by user 'r.davies'. Device blocked by Firewall endpoint policy.

Alert Metadata

Alert ID
ALR-00375
Timestamp
2026-04-07T18:52:43Z
Severity
Medium
Status
Investigating
Detection Source
Firewall
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
WS-PC-001
User Account
r.davies
Source IP
45.70.148.57
Destination IP
10.2.61.17
Origin Country
KP North Korea

MITRE ATT&CK Mapping

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

Investigation Timeline

18:52:43 Event ingested by SOC365 Engine
18:52:44 EmilyAI triage started — correlation enrichment
18:52:52 EmilyAI confidence: 86% — escalated to human analyst
18:53:01 Alert assigned to analyst: Marcus Webb
18:53:30 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00380 2h ago Suspicious Scheduled Task Low Escalated WS-PC-001
ALR-00096 8h ago Unauthorised USB Device Medium Open SRV-FILE-01
ALR-00404 9h ago Kerberoasting Attempt Low Escalated WS-PC-001
ALR-00174 13h ago Unauthorised USB Device Low False Positive SRV-MAIL-01
ALR-00393 17h ago Privilege Escalation Attempt Medium Resolved WS-PC-001