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Unauthorised USB Device

Medium False Positive
ALR-00116 · 2026-05-20T21:02:46Z

Description

Unauthorised USB mass storage device connected to FW-EDGE-01 by user 's.jones'. Device blocked by Firewall endpoint policy.

Alert Metadata

Alert ID
ALR-00116
Timestamp
2026-05-20T21:02:46Z
Severity
Medium
Status
False Positive
Detection Source
Firewall
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
FW-EDGE-01
User Account
s.jones
Source IP
45.189.148.58
Destination IP
10.1.55.229
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

21:02:46 Event ingested by SOC365 Engine
21:02:51 EmilyAI triage started — correlation enrichment
21:02:56 EmilyAI confidence: 78% — escalated to human analyst
21:03:25 Alert assigned to analyst: Sarah Chen
21:04:56 Investigation started — querying SIEM and threat intelligence
21:05:58 Containment action taken — endpoint isolated
21:21:24 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00449 2h ago Unauthorised USB Device Medium Open SRV-DC-01
ALR-00060 10h ago Unauthorised USB Device Informational Escalated WS-PC-006
ALR-00354 18h ago Unauthorised USB Device Medium Escalated WS-PC-004
ALR-00239 1d ago Suspicious Scheduled Task High Escalated FW-EDGE-01
ALR-00441 1d ago Unauthorised USB Device Medium False Positive WS-PC-001