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Unauthorised USB Device

Medium Open
ALR-00331 · 2026-07-07T06:04:52Z

Description

Unauthorised USB mass storage device connected to SRV-WEB-01 by user 'l.johnson'. Device blocked by Endpoint Agent endpoint policy.

Alert Metadata

Alert ID
ALR-00331
Timestamp
2026-07-07T06:04:52Z
Severity
Medium
Status
Open
Detection Source
Endpoint Agent
Assigned Analyst
Emma Richardson

Endpoint Information

Hostname
SRV-WEB-01
User Account
l.johnson
Source IP
103.81.216.17
Destination IP
10.0.251.67
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

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

Investigation Timeline

06:04:52 Event ingested by SOC365 Engine
06:04:54 EmilyAI triage started — correlation enrichment
06:05:02 EmilyAI confidence: 81% — escalated to human analyst
06:05:20 Alert assigned to analyst: Emma Richardson
06:06:21 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00220 8m ago Unauthorised USB Device Low Open WS-PC-003
ALR-00054 1h ago Phishing Email Blocked Medium False Positive SRV-WEB-01
ALR-00492 2h ago Tor Exit Node Connection Low False Positive SRV-WEB-01
ALR-00441 9h ago Data Exfiltration Attempt Low Resolved SRV-WEB-01
ALR-00428 16h ago Unauthorised USB Device Low False Positive SRV-SQL-01