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Unauthorised USB Device

Informational Open
ALR-00255 · 2026-05-25T07:51:00Z

Description

Unauthorised USB mass storage device connected to WS-PC-006 by user 'j.smith'. Device blocked by Email Gateway endpoint policy.

Alert Metadata

Alert ID
ALR-00255
Timestamp
2026-05-25T07:51:00Z
Severity
Informational
Status
Open
Detection Source
Email Gateway
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-006
User Account
j.smith
Source IP
91.113.195.181
Destination IP
10.0.31.141
Origin Country
NL Netherlands

MITRE ATT&CK Mapping

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

Investigation Timeline

07:51:00 Event ingested by SOC365 Engine
07:51:02 EmilyAI triage started — correlation enrichment
07:51:13 EmilyAI confidence: 93% — escalated to human analyst
07:51:45 Alert assigned to analyst: EmilyAI (auto)
07:52:40 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00153 34m ago Unauthorised USB Device Informational Investigating WS-PC-003
ALR-00413 1h ago Unauthorised USB Device Medium Resolved WS-PC-001
ALR-00191 1h ago Anomalous DNS Query Low Investigating WS-PC-006
ALR-00474 3h ago Unauthorised USB Device Informational Escalated SRV-DC-01
ALR-00240 3h ago DecoyPulse Honeypot Triggered Low Open WS-PC-006