190.89.137.139📋 Copy

# IP INTELLIGENCE BRIEFING: 190.89.137.139

Classification: Moderate Risk / Web Server

Generated: Current Intelligence Cycle

Status: Actionable Intelligence for SOC Review

---

## EXECUTIVE SUMMARY

IP 190.89.137.139 presents moderate risk (score: 55/100) as a web server infrastructure endpoint within the T. R. TELECOMUNICACOES LTDA network. The IP operates as a residential-classified web server with elevated neighborhood abuse density, warranting enhanced monitoring and defensive controls.

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## OWNERSHIP & GEOLOCATION

• Organization: T. R. TELECOMUNICACOES LTDA (ASN 270368)
• CIDR Block: 190.89.136.0/23
• Geolocation: Brazil (SP), Votuporanga
• Classification: Residential, Web Server
• Open Services: HTTP (80), HTTPS (443)
• Server Banner: lighttpd/1.4.39

---

## THREAT ASSESSMENT

Current Risk Score: 55/100 (Moderate)

Threat Indicators:

• No active threat indicators or known campaigns
• Not flagged as Tor exit node, known attacker, or spam source
• Blacklist count: 0 (current)
• Control Plane Anomaly: 3 DNSBL listings detected (out of 8 total lists)

Control Plane Observations:

• Route stability: False (isRouteStable)
• BGP Prefix: 190.89.137.0/24
• Operator Score: 0.1304 (Minimal)
• RPKI State: Not evaluated
• DNSSEC Valid: True

---

## NEIGHBORHOOD ANALYSIS

Subnet: 190.89.137.0/24

• Abuse Density: 0.4348 (Moderate-High)
• Total Siblings: 161
• Active Siblings: 64
• Threat Siblings: 70
• Risk Distribution: 25 High (24.8%), 66 Medium (65.3%), 9 Low (8.9%)

Assessment: This IP operates within a subnet exhibiting mixed classification with significant abuse density. The 70 threat siblings indicate coordinated or related malicious activity in the immediate network environment.

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## OBSERVATION HISTORY (18 Records)

Recent signal observations indicate:

• Geolocation: Country-level inference (Brazil) with 52% confidence; RTT validation failures detected (observed 143ms vs minimum possible 195.5ms for 9774km distance)
• Earlier Classification (2026-06-14): Flagged as residential infrastructure
• Threat Persistence: 0 days observed
• Ownership Changes: 0 recorded

Key Anomaly: Multiple RTT violations suggest either geolocation spoofing or measurement inconsistencies that warrant further validation.

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## RECOMMENDED ACTIONS

Priority: HIGH

1. Immediate Monitoring: Increase logging verbosity and review recent activity from this IP due to elevated risk score (55/100)

2. Firewall Implementation:

```bash

# iptables

iptables -A INPUT -s 190.89.137.139 -j DROP

# nftables

nft add rule inet filter input ip saddr 190.89.137.139 drop

```

3. WAF/Cloud Rules: Implement blocking rules for Cloudflare WAF and AWS WAF with description: "IPDebrief risk 55"

4. Contextual Review: Evaluate activity against the 70 threat siblings in the 190.89.137.0/24 subnet for potential campaign correlation

---

## INTELLIGENCE CONTEXT

This IP represents infrastructure within a telecommunications operator's network (T. R. TELECOMUNICACOES LTDA). The moderate risk classification combined with the high abuse density in the immediate subnet suggests this endpoint may be part of a larger attack surface requiring defensive posture adjustment. The residential classification despite being a web server may indicate compromised consumer infrastructure or unsecured hosting arrangements.

Recommendation: Implement monitoring controls pending further correlation with threat intelligence feeds and neighborhood analysis.

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