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Unauthorised USB Device

Low False Positive
ALR-00437 · 2026-05-23T04:41:06Z

Description

Unauthorised USB mass storage device connected to SRV-SQL-01 by user 'a.wilson'. Device blocked by Firewall endpoint policy.

Alert Metadata

Alert ID
ALR-00437
Timestamp
2026-05-23T04:41:06Z
Severity
Low
Status
False Positive
Detection Source
Firewall
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-SQL-01
User Account
a.wilson
Source IP
185.106.220.184
Destination IP
10.3.254.197
Origin Country
UA Ukraine

MITRE ATT&CK Mapping

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

Investigation Timeline

04:41:06 Event ingested by SOC365 Engine
04:41:11 EmilyAI triage started — correlation enrichment
04:41:16 EmilyAI confidence: 88% — escalated to human analyst
04:41:36 Alert assigned to analyst: EmilyAI (auto)
04:42:07 Investigation started — querying SIEM and threat intelligence
04:47:06 Containment action taken — endpoint isolated
04:52:27 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00293 2h ago Unauthorised USB Device Informational Escalated FW-EDGE-01
ALR-00321 3h ago Unauthorised USB Device Low Open WS-PC-004
ALR-00105 14h ago Failed MFA Challenge Informational False Positive SRV-SQL-01
ALR-00438 18h ago Data Exfiltration Attempt Medium Resolved SRV-SQL-01
ALR-00313 1d ago Phishing Email Blocked Low False Positive SRV-SQL-01