5.167.64.50📋 Copy

# IP Intelligence Briefing: 5.167.64.50

Classification: Moderate Risk (Score: 40)

Date: 2026-06-24

Analyst: IPDebrief Intelligence Team

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## Executive Summary

IP address 5.167.64.50 is a residential endpoint located in Cheboksary, Russia, operated by ER-Telecom Holding (ASN 57026). The IP demonstrates moderate risk characteristics with evidence of blacklist listings and high-severity threat indicators in recent observations. The address belongs to a dynamic residential ISP allocation with 256 total siblings in the /24 subnet, of which 157 are currently active.

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## Technical Profile

Ownership & Infrastructure:

• ASN: 57026 (ERT-Telecom Holding Cheboksary branch)
• Organization: Network Operation Center CJSC ER-Telecom Holding
• Country: RU (Russia) — Chuvash Republic, Cheboksary
• CIDR Block: 5.167.64.0/22
• Network Type: Residential (PPPoE)
• Infrastructure: Residential Endpoint, not cloud/CDN/proxy infrastructure

DNS Configuration:

• PTR Record: 5x167x64x50.dynamic.cheb.ertelecom.ru
• Reverse DNS: Forward confirmed, hosted under ertelecom.ru
• DNSSEC: Valid
• Email Auth: SPF and DMARC records present

Network Classification:

• BGP Prefix: 5.167.64.0/22
• Route Stability: Unstable (no route changes in 30 days)
• RPKI State: Not validated
• DNSBL Status: Listed on 1 of 8 DNSBL feeds

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## Threat Indicators

Current Risk Assessment:

• Risk Score: 40/100 (Moderate Risk)
• Abuse Confidence Score: Not applicable
• Known Campaigns: None detected
• Threat Feed Matches: 0
• Campaign Likelihood: None

Threat Profile:

• Is Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Blacklist Count: 0 (current)
• Active Threat Indicators: None

Control Plane Data:

• Operator Score: 0.1304 (Minimal)
• Delegation Age: Not available
• IRR Consistency: Not validated

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## Historical Analysis

Observation Timeline:

• Total Observations: 51 signals recorded
• Recent Activity: Multiple observations on 2026-06-24
• Threat Persistence: 0 days (transient activity)
• Ownership Changes: 0 (stable allocation)

Historical Signals:

• Signal Type 2344: Multiple blacklist listings detected with high severity ratings
• Signal Type 2349: DNS/CAA validation signals (Minimal operator score: 0)
• Signal Type 15: Comprehensive network profile signals with 6/6 dimensions covered

Temporal Trends:

• IP has been persistently observed with threat indicators
• No significant changes in ownership or routing
• Recent high-severity listings suggest active monitoring required

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## Neighborhood Analysis

Subnet: 5.167.64.50/24

• Total Siblings: 256 addresses
• Active Siblings: 157 (61% utilization)
• Abuse Density: High (classification)
• Risk Distribution:

- High Risk: 0

- Medium Risk: 86 (33.6%)

- Low Risk: 14 (5.5%)

- Other: 156 (61.0%)

Neighbor Risk Profile:

• Average risk scores across subnet range from 25-49
• Multiple IPs in the same /24 show moderate risk characteristics
• Network shows typical residential ISP abuse density patterns

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## Related Entities

Network Relationships:

• Primary Network: ERTH-CHEB-PPPOE-22-NET (283+ related network relationships)
• Network Type: Residential ISP allocation (PPPoE)
• Geographic Cluster: Cheboksary, Chuvash Republic

Correlated IPs:

• No direct host-to-host relationships detected
• Primary correlation is through ISP network infrastructure

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## Recommended Actions

Immediate Mitigation:

SOC Analysis Notes:

• Risk score of 40 warrants monitoring but does not indicate confirmed malicious activity
• Residential IP with moderate risk profile — consider context-specific blocking
• No active threat indicators but historical blacklist presence suggests prior abuse
• Monitor for patterns of abuse from this IP or subnet
• Review firewall rules quarterly or after significant network changes

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## Intelligence Assessment

This IP address represents a moderate-risk residential endpoint within a Russian ISP infrastructure. While no active threat indicators are currently present, the historical blacklist listings and moderate risk score suggest the IP may have been involved in prior abuse campaigns. The residential nature of the allocation makes definitive attribution challenging without additional contextual data.

Recommendation: Implement blocking controls with awareness of potential legitimate use cases. Monitor for recurring abuse patterns from this address or adjacent IPs in the 5.167.64.0/24 subnet. Update rules based on observed threat activity changes.

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*Report generated by IPDebrief Intelligence Platform*

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