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Unauthorised USB Device

Informational Open
ALR-00091 · 2026-10-06T20:39:51Z

Description

Unauthorised USB mass storage device connected to SRV-MAIL-01 by user 'n.clark'. Device blocked by Firewall endpoint policy.

Alert Metadata

Alert ID
ALR-00091
Timestamp
2026-10-06T20:39:51Z
Severity
Informational
Status
Open
Detection Source
Firewall
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-MAIL-01
User Account
n.clark
Source IP
91.202.195.128
Destination IP
10.2.113.169
Origin Country
VN Vietnam

MITRE ATT&CK Mapping

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

Investigation Timeline

20:39:51 Event ingested by SOC365 Engine
20:39:54 EmilyAI triage started — correlation enrichment
20:39:58 EmilyAI confidence: 80% — escalated to human analyst
20:40:12 Alert assigned to analyst: EmilyAI (auto)
20:42:33 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00170 4h ago Lateral Movement Detected High Open SRV-MAIL-01
ALR-00466 10h ago Unauthorised USB Device Low Investigating WS-PC-002
ALR-00449 10h ago Unauthorised USB Device Medium Investigating SRV-MAIL-01
ALR-00456 14h ago Unauthorised USB Device High Investigating AP-WIFI-03
ALR-00073 15h ago Unauthorised USB Device Informational Escalated WS-LAP-010