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Unauthorised USB Device

Low Investigating
ALR-00398 · 2026-07-05T08:31:22Z

Description

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

Alert Metadata

Alert ID
ALR-00398
Timestamp
2026-07-05T08:31:22Z
Severity
Low
Status
Investigating
Detection Source
EmilyAI Triage
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-WEB-01
User Account
n.clark
Source IP
185.16.220.23
Destination IP
10.1.76.116
Origin Country
BR Brazil

MITRE ATT&CK Mapping

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

Investigation Timeline

08:31:22 Event ingested by SOC365 Engine
08:31:25 EmilyAI triage started — correlation enrichment
08:31:35 EmilyAI confidence: 94% — escalated to human analyst
08:31:47 Alert assigned to analyst: EmilyAI (auto)
08:32:11 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00106 5h ago Pass-the-Hash Detected Informational Escalated SRV-WEB-01
ALR-00098 5h ago Unauthorised USB Device Medium Resolved WS-PC-003
ALR-00386 13h ago Ransomware Behaviour Detected Critical Escalated SRV-WEB-01
ALR-00295 18h ago Unauthorised USB Device High Open WS-LAP-012
ALR-00084 1d ago Kerberoasting Attempt Low False Positive SRV-WEB-01