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Unauthorised USB Device

Medium Escalated
ALR-00458 · 2026-04-10T05:53:02Z

Description

Unauthorised USB mass storage device connected to SRV-FILE-01 by user 'f.hall'. Device blocked by Cloud Connector endpoint policy.

Alert Metadata

Alert ID
ALR-00458
Timestamp
2026-04-10T05:53:02Z
Severity
Medium
Status
Escalated
Detection Source
Cloud Connector
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
SRV-FILE-01
User Account
f.hall
Source IP
103.156.216.93
Destination IP
10.0.228.235
Origin Country
RU Russia

MITRE ATT&CK Mapping

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

Investigation Timeline

05:53:02 Event ingested by SOC365 Engine
05:53:04 EmilyAI triage started — correlation enrichment
05:53:08 EmilyAI confidence: 97% — escalated to human analyst
05:53:33 Alert assigned to analyst: Sarah Chen
05:55:54 Investigation started — querying SIEM and threat intelligence
06:01:56 Containment action taken — endpoint isolated
06:03:15 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00364 57m ago Suspicious PowerShell Execution Low False Positive SRV-FILE-01
ALR-00222 3h ago Data Exfiltration Attempt Informational Investigating SRV-FILE-01
ALR-00226 4h ago Suspicious Scheduled Task High Investigating SRV-FILE-01
ALR-00288 7h ago Port Scan Detected Informational Escalated SRV-FILE-01
ALR-00047 14h ago Unauthorised USB Device Low Resolved WS-LAP-011