5.167.71.28📋 Copy

# IP INTELLIGENCE BRIEFING: 5.167.71.28/32

Date: 2026-06-25

Classification: Moderate Risk - Residential Endpoint

Intel Confidence: 85%

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## EXECUTIVE SUMMARY

IP 5.167.71.28 is a residential endpoint associated with ER-Telecom Holding's Cheboksary infrastructure in Russia. The address carries a risk score of 40, indicating moderate risk. While no active threat indicators or malicious campaigns were detected, the IP belongs to a /24 subnet classified as high abuse with 107 active sibling addresses. No immediate blocking required unless specific threat behavior is observed.

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## NETWORK IDENTIFICATION

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## THREAT ASSESSMENT

Current Risk Score: 40 (Moderate)

Operator Score: 0.1304 (Minimal)

Abuse Confidence Score: Not available

Threat Indicators: None detected

Blacklist Status: 0 blacklist hits (1 DNSBL listing out of 8 total lists)

Known Campaigns: None

Tor Exit Node: No

Known Attacker: No

Spam Source: No

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## NETWORK BEHAVIOR & CLASSIFICATION

• Infrastructure Type: Residential
• Connection Type: Residential
• Cloud/CDN/Proxy: No
• Mobile Carrier: No
• Open Ports: None detected
• TLS/HTTP Services: None detected
• DNS PTR Hostname: 5x167x71x28.dynamic.cheb.ertelecom.ru
• DNS Forward Resolution: 5x167x71x28.dynamic.cheb.ertelecom.ru (ertelecom.ru domain)

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## SUBNET ANALYSIS (5.167.71.0/24)

Assessment: The /24 subnet shows elevated abuse density with 107 active endpoints. Consistent risk scores of 40 across sibling addresses indicate systematic network-level risk rather than isolated endpoint behavior.

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## OBSERVATION HISTORY (48 Total Signals)

Recent Activity Timeline:

• 2026-06-25 00:03:51 UTC: ASN 57026 confirmed (CHEB-AS - JSC _ER-Telecom Holding_)
• 2026-06-25 00:02:33 UTC: Geolocation inferred (RU, confidence 0.52)
• 2026-06-24 21:22:41 UTC: Operator score 0 (Minimal)
• 2026-06-24 15:20:52 UTC: Operator score 0 (Minimal)

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence: 0 days
• Threat Observation Count: 1
• Persistently Malicious: No
• Route Stability: Not stable

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## RELATIONSHIP GRAPH

Total Relationships: 315

Primary Association: ERT-H-CHEB-PPPOE-22-NET (Same Network)

The IP maintains extensive relationships within the ER-Telecom Cheboksary PPPoE network infrastructure.

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## RECOMMENDED ACTIONS

Current Risk Level: Moderate (40)

Recommended Action: Monitor - No immediate block required

Firewall Rules (if blocking warranted):

```bash

# iptables

iptables -A INPUT -s 5.167.71.28 -j DROP

# nftables

nft add rule inet filter input ip saddr 5.167.71.28 drop

# nginx

deny 5.167.71.28;

# pfSense

5.167.71.28/32

# Cloudflare WAF

{"description":"Block 5.167.71.28 — IPDebrief risk score 40","action":"block"}

# AWS WAF

{"Addresses":["5.167.71.28/32"],"Description":"IPDebrief risk 40"}

```

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## INTELLIGENCE NOTES FOR SOC ANALYSTS

1. Residential Nature: This is a standard residential PPPoE endpoint from a major Russian ISP. False positive risk is elevated without additional threat signals.

2. Subnet Context: The /24 subnet shows high abuse density. If this IP exhibits malicious behavior, related IPs in the same subnet may warrant investigation.

3. No Active Threats: No malware, scanning, or abuse indicators detected in current profile.

4. Geolocation Verification: Geo validation showed ICMP blocked (unable to validate). Distance calculated: 2631.2 km from probe location.

5. Monitoring Recommendation: Track for any emergence of threat indicators. If abuse is observed, consider blocking the /24 or /20 prefix rather than individual IPs.

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Source: IPDebrief Intelligence Platform

Data Freshness: 2026-06-25

Analysis Status: Complete

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