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Unauthorised USB Device

Informational Escalated
ALR-00405 · 2026-10-10T10:17:04Z

Description

Unauthorised USB mass storage device connected to SRV-BACKUP-01 by user 'c.williams'. Device blocked by DecoyPulse endpoint policy.

Alert Metadata

Alert ID
ALR-00405
Timestamp
2026-10-10T10:17:04Z
Severity
Informational
Status
Escalated
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-BACKUP-01
User Account
c.williams
Source IP
103.236.216.31
Destination IP
10.2.59.88
Origin Country
RO Romania

MITRE ATT&CK Mapping

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

Investigation Timeline

10:17:04 Event ingested by SOC365 Engine
10:17:06 EmilyAI triage started — correlation enrichment
10:17:14 EmilyAI confidence: 88% — escalated to human analyst
10:17:21 Alert assigned to analyst: EmilyAI (auto)
10:19:24 Investigation started — querying SIEM and threat intelligence
10:24:41 Containment action taken — endpoint isolated
10:31:25 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00249 7h ago Unauthorised USB Device Medium Resolved SRV-WEB-01
ALR-00280 7h ago Certificate Anomaly Medium Resolved SRV-BACKUP-01
ALR-00500 12h ago Ransomware Behaviour Detected Medium Resolved SRV-BACKUP-01
ALR-00490 13h ago Certificate Anomaly High Escalated SRV-BACKUP-01
ALR-00201 16h ago Unauthorised USB Device High Investigating SRV-FILE-01