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Unauthorised USB Device

Low Open
ALR-00028 · 2026-04-09T20:58:04Z

Description

Unauthorised USB mass storage device connected to WS-PC-003 by user 'l.johnson'. Device blocked by Network IDS endpoint policy.

Alert Metadata

Alert ID
ALR-00028
Timestamp
2026-04-09T20:58:04Z
Severity
Low
Status
Open
Detection Source
Network IDS
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-003
User Account
l.johnson
Source IP
91.147.195.92
Destination IP
10.1.184.204
Origin Country
CN China

MITRE ATT&CK Mapping

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

Investigation Timeline

20:58:04 Event ingested by SOC365 Engine
20:58:09 EmilyAI triage started — correlation enrichment
20:58:09 EmilyAI confidence: 96% — escalated to human analyst
20:58:48 Alert assigned to analyst: EmilyAI (auto)
20:59:13 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00200 2h ago Credential Stuffing Attempt Informational Escalated WS-PC-003
ALR-00250 13h ago Rogue DHCP Server Informational Investigating WS-PC-003
ALR-00127 17h ago Failed MFA Challenge Medium Investigating WS-PC-003
ALR-00237 18h ago Unauthorised USB Device Medium Open WS-PC-003
ALR-00267 21h ago Certificate Anomaly Low Escalated WS-PC-003