203.12.31.167📋 Copy

## Threat Intelligence Briefing: 203.12.31.167/32

Date: 2026-08-10

Classification: Moderate Risk

Prepared by: IPDebrief Intelligence Analysis

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Executive Summary

IP address 203.12.31.167 is a Tor exit node associated with ASN 210083 (SE-OMA-19950123) originating from the APNIC region. The address presents a moderate risk profile (score: 59) with confirmed Tor exit node activity and one DNSBL listing. No active services or open ports were detected on the IP. The subnet environment shows low-to-moderate abuse density (0.25), with three neighboring IPs exhibiting comparable risk scores (49-59).

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Technical Profile

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Threat Assessment

Primary Risk Factor: Tor Exit Node Activity

• The IP is classified as a Tor exit node, which is a known infrastructure component for anonymized traffic
• Tor exit nodes are commonly used by legitimate privacy users but also exploited by threat actors to mask malicious origin
• One blacklisting event recorded, with DNSBL presence across 8 total threat feeds

Observed Signals:

• No active services detected (no open ports, no TLS certificates, no HTTP banners)
• Service classification: "Firewalled / No Services"
• No email authentication records (no SPF/DMARC)
• No reverse DNS entries

Temporal Analysis:

• Single threat observation recorded
• Not persistently malicious (threatPersistenceDays: 0)
• Ownership stability: No ownership changes observed
• History shows 40 total observations across routing, threat, and service signal types

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Neighborhood Analysis

Subnet: 203.12.31.0/24

• Abuse Density: 0.25 (low-moderate)
• Total Siblings: 4
• Active Siblings: 4
• Threat Siblings: 1

Notable Neighbors:

The subnet contains three additional active IP addresses, all with moderate risk scores (49-59). One neighbor (203.12.31.101) matches the risk profile of the target IP.

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Relationships

The IP maintains 395 relationships primarily linked to the network identifier SE-OMA-19950123. All relationships are classified as "Same Network," indicating the IP is part of a larger infrastructure cluster with consistent routing and ownership attributes.

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Recommended Actions

SOC/Security Operations:

1. Monitor for Tor Traffic Patterns: Flag any outbound connections to this IP as potentially anonymized traffic requiring investigation

2. Block at Perimeter: Consider blocking inbound connections to this IP at network perimeter if not required for business operations

3. Correlate with Logs: Search SIEM for connection attempts from known Tor exit node IP ranges

4. Whitelist Decision: Evaluate if this IP should be whitelisted for legitimate use cases (e.g., privacy-focused users, CDN providers)

Firewall Rules (iptables/nftables):

```

# Recommended: Block Tor exit nodes (adjust as needed for business requirements)

iptables -A INPUT -s 203.12.31.167/32 -j DROP

```

Cloudflare/AWS WAF:

• Consider adding to blocklist with risk-based rule: `risk_score > 50 AND is_tor_exit_node = true`

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Intelligence Notes

• The IP exhibits stable routing characteristics with no route changes in the past 30 days
• BGP path: 6939 → 400587 → 210083
• RPKI validation status: Not applicable (state null)
• Geolocation validation: ICMP blocked, unable to validate via probe
• No associated campaigns or known attack infrastructure linked to this IP

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Status: Monitor. This IP represents a known Tor exit node with moderate risk. No immediate threat indicators, but traffic from Tor exit nodes should be treated as potentially suspicious depending on organizational policy.

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