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Unauthorised USB Device

Medium Open
ALR-00474 · 2026-04-08T03:18:38Z

Description

Unauthorised USB mass storage device connected to SRV-DC-01 by user 'e.evans'. Device blocked by SOC365 Engine endpoint policy.

Alert Metadata

Alert ID
ALR-00474
Timestamp
2026-04-08T03:18:38Z
Severity
Medium
Status
Open
Detection Source
SOC365 Engine
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
SRV-DC-01
User Account
e.evans
Source IP
194.131.62.120
Destination IP
10.2.163.242
Origin Country
BR Brazil

MITRE ATT&CK Mapping

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

Investigation Timeline

03:18:38 Event ingested by SOC365 Engine
03:18:41 EmilyAI triage started — correlation enrichment
03:18:47 EmilyAI confidence: 90% — escalated to human analyst
03:19:17 Alert assigned to analyst: Marcus Webb
03:19:30 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00149 3m ago Unauthorised USB Device Low False Positive WS-LAP-011
ALR-00069 6h ago Unauthorised USB Device Low Investigating WS-PC-003
ALR-00366 7h ago Rogue DHCP Server Medium Investigating SRV-DC-01
ALR-00237 10h ago Failed MFA Challenge Low Open SRV-DC-01
ALR-00276 16h ago Unauthorised USB Device Informational False Positive WS-PC-002