52.167.144.201📋 Copy

# IP Intelligence Briefing: 52.167.144.201/32

## Executive Summary

IP 52.167.144.201 is a Microsoft Corporation cloud infrastructure asset operating as Bing search bot (msnbot) from Madison, Wisconsin. While identified as legitimate Microsoft infrastructure, the subnet exhibits elevated abuse density (0.6471) with 55 of 85 total siblings flagged as threats. Risk score: 50 (Moderate).

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## Technical Profile

Ownership & Classification

• Organization: Microsoft Corporation (ASN 8075)
• Network Role: Bingbot search crawler
• Infrastructure Type: CloudCompute
• Registration: ARIN RIR
• Geolocation: Madison, Wisconsin, US (866 km accuracy radius)

Network Services

• Open Ports: None detected (firewalled/no services)
• DNS PTR: msnbot-52-167-144-201.search.msn.com
• Forward Resolution: msn.com
• Email Auth: SPF and DMARC configured
• TLS Certificates: None exposed

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## Threat Assessment

Risk Indicators

• Overall Risk Score: 50 (Moderate)
• Known Campaigns: None
• Tor Exit Node: No
• Spam Source: No
• Known Attacker: No
• Blacklist Count: 0

Control Plane Analysis

• BGP Prefix: 52.160.0.0/11
• Route Stability: False (non-stable routing)
• DNSSEC Valid: Yes
• DNSBL Listed: 2 of 8 total lists
• Operator Score: 0.3478 (Basic tier)

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## Subnet Context Analysis

Neighborhood Intelligence (52.167.144.0/24)

• Total Siblings: 85 IPs
• Active Siblings: 60
• Threat Siblings: 55
• Abuse Density: 0.6471 (High abuse classification)
• Inherited Risk Score: 25

Neighbor Risk Distribution

• High Risk: 0
• Medium Risk: 76 (89%)
• Low Risk: 8 (9%)

This subnet operates under Microsoft's broader cloud infrastructure but shows elevated peer activity. The high abuse density is consistent with Microsoft's large-scale cloud environment where legitimate traffic may trigger false positive classifications.

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## Historical Trajectory

Observation Timeline

• Total Observations: 26
• Most Recent: 2026-06-19
• Threat Persistence: 0 days (not persistently malicious)
• Ownership Changes: 0

Signal history indicates consistent Microsoft Bingbot operational patterns with no escalation in threat indicators. The IP maintains stable classification as cloud infrastructure throughout the observation window.

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## Relationship Graph

Associated Entities

• Network: MSFT (Microsoft)
• DNS Hostnames: msnbot-52-167-144-201.search.msn.com
• Total Relationships: 59
• Primary Type: Same Network, DNS Association

All relationships confirm Microsoft infrastructure ownership with no anomalous external associations.

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## SOC Recommendations

Traffic Handling

Action: Monitor without blocking

Rationale: Legitimate Microsoft Bingbot traffic. The moderate risk score reflects subnet-level abuse density rather than IP-specific malicious behavior. Blocking would disrupt legitimate search indexing.

Firewall Considerations

If blocking is required due to policy constraints:

```bash

iptables -A INPUT -s 52.167.144.201 -j DROP

nft add rule inet filter input ip saddr 52.167.144.201 drop

```

Intelligence Notes

1. DNSBL listings (2 of 8) likely represent false positives for Microsoft cloud infrastructure

2. No campaign correlations detected

3. Subnet abuse density warrants monitoring of adjacent IPs for anomalous patterns

4. Verify any blocked traffic against legitimate Microsoft bot user-agent signatures before taking action

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Classification: MODERATE RISK - LEGITIMATE INFRASTRUCTURE WITH SUBNET CONTEXT CONCERNS

Last Updated: 2026-06-19

Data Sources: IPDebrief Intelligence Platform

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