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Unauthorised USB Device

Informational Resolved
ALR-00262 · 2026-07-06T18:47:28Z

Description

Unauthorised USB mass storage device connected to SRV-FILE-01 by user 'r.davies'. Device blocked by Email Gateway endpoint policy.

Alert Metadata

Alert ID
ALR-00262
Timestamp
2026-07-06T18:47:28Z
Severity
Informational
Status
Resolved
Detection Source
Email Gateway
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-FILE-01
User Account
r.davies
Source IP
185.179.220.15
Destination IP
10.3.1.192
Origin Country
NL Netherlands

MITRE ATT&CK Mapping

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

Investigation Timeline

18:47:28 Event ingested by SOC365 Engine
18:47:33 EmilyAI triage started — correlation enrichment
18:47:42 EmilyAI confidence: 80% — escalated to human analyst
18:48:09 Alert assigned to analyst: EmilyAI (auto)
18:48:30 Investigation started — querying SIEM and threat intelligence
18:54:24 Containment action taken — endpoint isolated
18:57:37 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00321 57m ago Insider Threat Indicator Low Investigating SRV-FILE-01
ALR-00364 1h ago Unauthorised USB Device Informational Open WS-PC-004
ALR-00452 9h ago DecoyPulse Honeypot Triggered Medium Investigating SRV-FILE-01
ALR-00047 10h ago Tor Exit Node Connection High Investigating SRV-FILE-01
ALR-00322 17h ago Unauthorised USB Device Low False Positive WS-PC-001