167.172.71.66📋 Copy

# IP Intelligence Briefing: 167.172.71.66/32

Date: 2026-06-26

Classification: LOW RISK / LEGITIMATE INFRASTRUCTURE

Analyst: IPDebrief Intelligence Team

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## Executive Summary

IP 167.172.71.66 is a DigitalOcean cloud compute instance hosting Microsoft services. The IP presents a low-risk profile (risk score 25/100) with legitimate business infrastructure characteristics. While the IP is listed on one blacklist with high severity, context indicates this may be a false positive or related to Microsoft's security infrastructure. No immediate blocking is recommended, but monitoring is advised.

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## Infrastructure Profile

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## Technical Services

Open Ports:

• Port 443/TCP: HTTPS (web server)
• Port 22/TCP: SSH (OpenSSH_9.6p1 Ubuntu-3ubuntu13.16)

TLS Certificate:

• Issuer: Microsoft TLS G2 RSA CA OCSP 04, O=Microsoft Corporation, C=US
• Subject: CN=www.microsoft.com, O=Microsoft Corporation, L=Redmond, S=WA, C=US
• Common Names: wwwqa.microsoft.com, www.microsoft.com, staticview.microsoft.com, i.s-microsoft.com, microsoft.com (+2 more)
• Certificate Type: Not self-signed

Server Identification:

• Banner: AkamaiGHost
• HTTP Status: 400 (Bad Request)
• Protocol: HTTP/1.0

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## Threat Assessment

Risk Score: 25/100 (Low Risk)

Blacklist Status:

• Lists Listed: 1 of 8 total lists
• Maximum Severity: High
• DNSBL Listings: Present (requires investigation)

Threat Indicators:

• Is Tor Exit Node: No
• Is Known Attacker: No
• Is Spam Source: No
• Campaign Likelihood: None
• Known Campaigns: None
• Threat Feeds: None

Abuse Confidence: Not determined

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## Neighborhood Analysis

Subnet: 167.172.71.0/24

• Abuse Density: 0.5 (moderate)
• Classification: mostly_clean
• Total Siblings: 2
• Active Siblings: 2
• Threat Siblings: 1

Neighbor IP:

• 167.172.71.29: Risk Score 25 (low risk)

Risk Distribution: 1 low-risk neighbor identified

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## Historical Observations

Total Signals Observed: 21

Recent Activity (2026-06-26):

• Subnet Analysis: Abuse density 0.5, classification mostly_clean
• HTTP Response: Status 400, server AkamaiGHost, HTTPS enabled
• DNS Records: Domain s-microsoft.com with DMARC policy (p=reject)
• Geolocation: Redmond, WA, US (confidence 0.385)
• Blacklist Status: Listed on 1 list with high severity

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence Days: 0
• Threat Observation Count: 1
• Persistently Malicious: No

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## Relationships

Network Associations: 36 relationships identified, all mapping to DigitalOcean network infrastructure.

Key Relationships:

• Same Network: DigitalOcean (36 instances)
• No certificate or hostname relationships detected beyond Microsoft infrastructure

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## Recommended Actions

Immediate Actions: None required (risk score 25)

Firewall Rules: Not recommended at this time

Monitoring Recommendations:

1. Monitor blacklist status for the high-severity listing

2. Verify if blacklist listing is related to Microsoft security infrastructure

3. Continue passive monitoring for any risk score increases

4. Review DNSBL listings to determine source and reason for listing

Confidence Level: Medium-High

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## Conclusion

IP 167.172.71.66 represents legitimate Microsoft infrastructure hosted on DigitalOcean cloud infrastructure. The IP hosts Microsoft web services and has properly configured security policies (SPF, DMARC). While listed on one blacklist with high severity, the overall risk profile remains low (25/100) with no threat indicators detected. The IP should be allowed through with continued monitoring.

Classification: LOW RISK

Action: ALLOW WITH MONITORING

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