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Unauthorised USB Device

Medium Open
ALR-00063 · 2026-04-07T16:06:28Z

Description

Unauthorised USB mass storage device connected to SRV-FILE-01 by user 'k.brown'. Device blocked by Email Gateway endpoint policy.

Alert Metadata

Alert ID
ALR-00063
Timestamp
2026-04-07T16:06:28Z
Severity
Medium
Status
Open
Detection Source
Email Gateway
Assigned Analyst
Emma Richardson

Endpoint Information

Hostname
SRV-FILE-01
User Account
k.brown
Source IP
103.221.216.229
Destination IP
10.3.236.70
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

16:06:28 Event ingested by SOC365 Engine
16:06:29 EmilyAI triage started — correlation enrichment
16:06:39 EmilyAI confidence: 78% — escalated to human analyst
16:07:10 Alert assigned to analyst: Emma Richardson
16:07:27 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00429 9h ago Ransomware Behaviour Detected Medium Resolved SRV-FILE-01
ALR-00398 14h ago DecoyPulse Honeypot Triggered Informational Resolved SRV-FILE-01
ALR-00237 18h ago Unauthorised USB Device Medium Open WS-PC-003
ALR-00197 1d ago Unauthorised USB Device Medium False Positive WS-PC-001
ALR-00335 1d ago Shadow IT Discovery Low Open SRV-FILE-01