4.204.201.85📋 Copy

# IP INTELLIGENCE BRIEFING: 4.204.201.85/32

## EXECUTIVE SUMMARY

IP address 4.204.201.85 is associated with Microsoft Corporation (ASN 8075) and Microsoft Azure infrastructure. The IP carries an elevated risk score of 80/100 despite operating within a clean subnet environment. No active services or open ports were detected. The IP is listed on 4 of 8 DNSBLs, indicating prior reputation concerns.

## OWNERSHIP AND INFRASTRUCTURE

• Organization: Microsoft Corporation (MSFT)
• ASN: 8075
• Network Block: 4.192.0.0/12
• Infrastructure Type: CloudCompute (Microsoft Azure)
• Classification: Cloud provider, hosting-enabled
• Registration: ARIN (US-based)

## GEOLOCATION DATA

• Primary Location: Boston, MA, US
• Alternative Signals: Conflicting geolocation data observed in historical records
• Network Classification: Cloud infrastructure (non-residential)

## THREAT INDICATORS

• Risk Score: 80/100 (High Risk)
• DNSBL Listings: 4 of 8 total lists
• Known Attacker: No
• Tor Exit Node: No
• Known Campaign: None identified
• Abuse Confidence Score: Not available
• Open Ports: None detected (service status: Firewalled / No Services)

## NEIGHBORHOOD ANALYSIS

• Subnet: 4.204.201.85/24
• Abuse Density: 0 (clean)
• Threat Siblings: 0
• Active Siblings: 0
• Classification: Clean

## OBSERVATION HISTORY

Sixteen historical observations recorded. Recent signals indicate:

• Subnet classification remains "clean" with inherited risk of 0
• No ownership changes detected
• No persistent malicious activity patterns observed
• Geolocation signals show moderate confidence (0.35-0.40) with varying country assignments

## NETWORK RELATIONSHIPS

Two relationships identified, both categorized as "Same Network" pointing to MSFT infrastructure.

## RECOMMENDED ACTIONS

Priority: Critical

1. Monitoring: Increase logging verbosity and review recent activity from this IP address

2. Firewall Rules: Implement blocking or allowlist with enhanced monitoring based on organizational policy

3. Platforms:

- iptables: `iptables -A INPUT -s 4.204.201.85 -j DROP`

- nftables: `nft add rule inet filter input ip saddr 4.204.201.85 drop`

- nginx: `deny 4.204.201.85;`

- pfSense: `4.204.201.85/32`

- Cloudflare WAF: Block with description "IPDebrief risk score 80"

- AWS WAF: Address 4.204.201.85/32

## ANALYST NOTES

The elevated risk score (80/100) appears inconsistent with the clean subnet environment and Microsoft Azure ownership. DNSBL listings (4/8) suggest historical abuse reports or reputation issues. SOC teams should correlate with internal logs to determine if this represents:

• Legitimate Microsoft infrastructure with legitimate traffic flagged by external feeds
• Compromised Azure infrastructure
• False positive in risk scoring algorithms

Recommendation: Do not take immediate blocking action without correlating with internal threat indicators. Implement enhanced monitoring and investigate the source of DNSBL listings.

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