187.75.90.70📋 Copy

# IP Intelligence Briefing: 187.75.90.70

Classification: Moderate Risk (Score: 40)

Date: 2026-07-29

Prepared For: SOC Operations

## Executive Summary

IP 187.75.90.70 is a residential/ISP-managed address belonging to TELEFÔNICA BRASIL S.A (ASN 27699). The IP presents moderate risk primarily due to DNSBL listings and intermittent threat associations, but demonstrates no active malicious indicators or open services. The surrounding subnet (187.75.90.0/24) is classified as clean with zero abuse density.

## Ownership and Geolocation

## Threat Indicators

• Risk Score: 40 (Moderate)
• Blacklist Count: 2 DNSBL listings out of 8 total lists
• Known Campaigns: None identified
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Operator Score: 0.1304 (Minimal)

Observation History (17 signals):

Recent observations from 2026-07-29 indicate:

• Multiple port scans detected
• Geolocation consistently reported as Brazil
• One observation flagged `has_threats: true` from AlienVault OTX
• No persistent malicious behavior observed

## Network Behavior

• Open Ports: None detected
• Service Status: Firewalled / No Services
• DNS PTR: 187-75-90-70.dsl.telesp.net.br
• Forward Resolution: Confirmed (1 hostname)
• Route Stability: Unstable
• DNSBL Listings: 2 active listings

## Subnet Analysis (187.75.90.0/24)

• Abuse Density: 0%
• Classification: Clean
• Active Siblings: 0
• Threat Siblings: 0
• Total Siblings: 1

## Recommended Actions

Based on the moderate risk profile and DNSBL listings:

1. Monitor but do not block — The IP shows no active exploitation indicators

2. Log traffic — Implement logging for connection attempts

3. Review DNSBL sources — Identify which 2 blacklists list this IP for potential false positives

4. Geolocation-based rules — Consider Brazil-specific traffic handling policies

5. No immediate firewall blocking recommended due to lack of active threat indicators

## Intelligence Assessment

The IP represents a passive residential/ISP endpoint with minimal infrastructure. The moderate risk rating stems from DNSBL listings rather than confirmed malicious activity. No evidence of command and control, spam distribution, or attack infrastructure. SOC teams should treat as low-priority unless traffic patterns change or additional threat intelligence emerges.

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