104.210.140.131📋 Copy

# INTELLIGENCE BRIEFING: 104.210.140.131

Classification: MODERATE RISK (Score: 40/100)

Date: 2026-06-25

Prepared For: SOC Analysts

Status: Active Monitoring Required

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## EXECUTIVE SUMMARY

IP 104.210.140.131 is a Microsoft Azure cloud infrastructure endpoint located in San Antonio, TX. While the IP itself shows no direct threat indicators, it resides within a /24 subnet exhibiting high abuse density (0.5625) with 9 threat-sibling IPs identified. The endpoint is firewalled with no active services but requires neighborhood-level monitoring.

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## NETWORK IDENTIFICATION

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## THREAT ASSESSMENT

Direct Threat Indicators: None detected

• No known attacker campaigns
• No Tor exit node activity
• No spam source classification
• Zero active open ports
• No email authentication records (SPF/DMARC)

Control Plane Status:

• 1 DNSBL listing among 8 total lists
• Route stability: Unstable (routing changes observed)
• RPKI state: Not available
• DNSSEC: Valid

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## NEIGHBORHOOD ANALYSIS

Subnet Risk Profile: HIGH ABUSE

• Abuse Density: 0.5625 (56.25% of IPs flagged)
• Total Siblings: 16
• Active Siblings: 12
• Threat Siblings: 9

Neighbor Risk Distribution:

Key Sibling IPs (Risk Score 40-50):

• 104.210.140.128–104.210.140.143 (15 IPs)
• All siblings show authority score of 50

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## OBSERVATION HISTORY

Total Signals: 18 observations (June 2026)

Recent Activity Timeline:

• 2026-06-25T21:59:47 – Geolocation confirmed (San Antonio, TX)
• 2026-06-25T21:58:58 – DNSBL listings updated (high severity)
• 2026-06-25T21:58:48 – Subnet abuse density classified as high_abuse

Trend Analysis:

• Consistent geolocation reporting
• Persistent DNSBL presence
• No evidence of escalating threat activity
• Average ownership days: Not applicable (cloud infrastructure)

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## RELATIONSHIP MAPPING

Network Associations: 28 relationships identified

• All relationships classified as "Same Network" (MSFT/Microsoft)
• No external hostname, organization, or certificate associations
• Indicates pure Microsoft Azure infrastructure footprint

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## RECOMMENDED ACTIONS

Immediate:

1. Monitor Subnet: Track activity across 104.210.140.0/24 subnet due to high abuse density

2. Threat Sibling Correlation: Investigate the 9 identified threat siblings for potential lateral relationships

3. DNSBL Verification: Confirm 1 DNSBL listing severity and source

Firewall/Security Rules:

• No immediate blocking recommended (risk score 40 = moderate)
• Monitor for outbound connections to known malicious destinations
• Block inbound traffic if organizational policy prohibits Azure-to-internal communications

Investigation Priorities:

• Determine if threat siblings are Azure customers or Microsoft infrastructure
• Assess if DNSBL listing is legitimate abuse or false positive
• Evaluate route stability implications for security posture

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## RISK CONCLUSION

This IP represents legitimate Microsoft Azure infrastructure with no direct compromise indicators. However, the high-abuse subnet environment necessitates proactive monitoring. The 9 threat-sibling IPs within the /24 subnet suggest potential shared infrastructure usage or customer accounts. Recommend ongoing observation without immediate blocking unless threat indicators develop.

Recommended Risk Score for SOC: 40/100 (MODERATE)

Action Level: MONITOR

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.