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Unauthorised USB Device

Informational Resolved
ALR-00123 · 2026-05-25T22:00:39Z

Description

Unauthorised USB mass storage device connected to SRV-APP-01 by user 'e.evans'. Device blocked by Email Gateway endpoint policy.

Alert Metadata

Alert ID
ALR-00123
Timestamp
2026-05-25T22:00:39Z
Severity
Informational
Status
Resolved
Detection Source
Email Gateway
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-APP-01
User Account
e.evans
Source IP
91.10.195.194
Destination IP
10.3.148.149
Origin Country
IR Iran

MITRE ATT&CK Mapping

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

Investigation Timeline

22:00:39 Event ingested by SOC365 Engine
22:00:42 EmilyAI triage started — correlation enrichment
22:00:51 EmilyAI confidence: 85% — escalated to human analyst
22:01:07 Alert assigned to analyst: EmilyAI (auto)
22:03:19 Investigation started — querying SIEM and threat intelligence
22:09:21 Containment action taken — endpoint isolated
22:15:17 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00015 2h ago Certificate Anomaly Informational Resolved SRV-APP-01
ALR-00336 10h ago Unauthorised USB Device Medium Investigating SRV-SQL-01
ALR-00099 15h ago Tor Exit Node Connection Low Open SRV-APP-01
ALR-00473 18h ago Unauthorised USB Device Low Investigating SRV-BACKUP-01
ALR-00068 19h ago Failed MFA Challenge High Investigating SRV-APP-01