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Unauthorised USB Device

Low Open
ALR-00313 · 2026-05-21T19:49:51Z

Description

Unauthorised USB mass storage device connected to WS-PC-004 by user 'system'. Device blocked by Attack Surface Scanner endpoint policy.

Alert Metadata

Alert ID
ALR-00313
Timestamp
2026-05-21T19:49:51Z
Severity
Low
Status
Open
Detection Source
Attack Surface Scanner
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-004
User Account
system
Source IP
45.3.148.130
Destination IP
10.2.68.234
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

19:49:51 Event ingested by SOC365 Engine
19:49:56 EmilyAI triage started — correlation enrichment
19:50:01 EmilyAI confidence: 90% — escalated to human analyst
19:50:15 Alert assigned to analyst: EmilyAI (auto)
19:50:49 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00392 3h ago Kerberoasting Attempt Medium Investigating WS-PC-004
ALR-00266 4h ago Unusual Outbound Traffic Critical Open WS-PC-004
ALR-00247 5h ago Unauthorised USB Device Low False Positive WS-PC-004
ALR-00426 9h ago Port Scan Detected Medium Resolved WS-PC-004
ALR-00473 23h ago Unauthorised USB Device Low Escalated WS-PC-004