191.53.128.175📋 Copy

## Intelligence Briefing: 191.53.128.175/32

Classification: MODERATE RISK | Generated: 2026-07-29

Executive Summary

Target IP 191.53.128.175 operates on the MASTER S/A network (ASN 28202, CIDR 191.53.0.0/16) with a moderate risk score of 40. The IP presents no active threat indicators, but exhibits moderate DNSBL presence and resides in a subnet with elevated abuse density (13.6%). Geolocation data shows consensus disagreement between US/Florida and Brazil/Montes Claras.

Network Profile

Observed Services & DNS

• PTR Record: 191-53-128-175.pso-wr.mastercabo.com.br
• Service Status: Firewalled / No Services (no open ports detected)
• TLS Certificate: None
• HTTP Title: None
• Email Auth: SPF/DMARC not configured (no email services observed)

Geolocation Analysis

Geolocation consensus is unresolved:

• Profile Data: US/Florida (2 sources, consensus=false)
• Recent Observation: Brazil/Montes Claras (Minas Gerais)
• Recommendation: Treat with caution; validate against internal geolocation policies

Threat Indicators

• Known Campaigns: None
• Tor Exit Node: False
• Known Attacker: False
• Spam Source: False
• Honeypot Hits: 0
• Persistence: Not persistently malicious (0 threat observation days)

Neighborhood Assessment

The /24 subnet (191.53.128.0/24) contains 22 sibling IPs with moderate-to-high abuse density:

• High Risk Neighbors (80+): 191.53.128.173, 191.53.128.236, 191.53.128.247
• Medium Risk Neighbors (40-79): 17 IPs including 191.53.128.108, 191.53.128.170
• Abuse Density: 13.6%

Notable: Multiple high-risk IPs in same subnet suggests potential hosting infrastructure with mixed-use patterns.

Observation History

15 observations recorded as of 2026-07-29. Recent signals include:

• TLS/Port scans (confidence 0.70)
• Geo-location updates (confidence 0.70)
• Operator scoring (confidence 0.60)
• No observed threat activity changes

Recommended Actions

1. Monitoring: No immediate block required; monitor for service activation

2. Firewall Rules: Default allow with logging recommended

3. DNSBL Verification: Review specific blacklist listings if receiving reports

4. Subnet Watch: Monitor 191.53.128.0/24 for coordinated activity given multiple high-risk neighbors

5. Geolocation Validation: Confirm expected geographic location against policy

Confidence Assessment

• Data Sufficiency: Moderate (4 of 6 dimensions covered)
• Observation Confidence: 0.1667 (overall)
• Threat Confidence: Low (no active indicators)

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Assessment: This IP represents a moderate-risk infrastructure endpoint with no current malicious activity. However, the subnet context and DNSBL presence warrant continued monitoring. No immediate blocking action recommended.

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