54.39.136.207📋 Copy

# IP INTELLIGENCE BRIEFING: 54.39.136.207

Date: Current Analysis Period

Classification: MODERATE RISK — HIGH-ABUSE SUBNET CONTEXT

## Executive Summary

IP 54.39.136.207 presents a moderate risk profile (Risk Score: 40) but operates within a high-abuse subnet environment. The address resolves to OVH cloud infrastructure in Beauharnois, QC, Canada, with associations to Ahrefs Pte Ltd. While no active threat indicators are present, the neighborhood context requires monitoring.

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## Network & Ownership Profile

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## Geolocation Assessment

Note: Geolocation data shows 5629km distance from probe location with RTT 31ms, which is below the minimum theoretical RTT (112.6ms). This indicates potential geolocation inaccuracy.

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## Threat Intelligence Indicators

Control Plane: The IP has been DNSBL listed on 1 of 8 threat feeds, suggesting historical reputation concerns despite current clean status.

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## Neighborhood Analysis (54.39.136.0/24)

Assessment: The subnet exhibits elevated abuse density with 175 threat-sibling IPs. While this specific IP shows no active threats, the neighborhood context suggests potential for collateral risk or coordinated activity.

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## DNS & Service Analysis

Note: The PTR record indicates association with Ahrefs proxy infrastructure. However, forward resolution is unconfirmed, and no services are actively listening on open ports.

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## Historical Signal Analysis

Observation Count: 21 signals tracked

Recent Activity (June 20, 2026):

• Subnet abuse classification: high_abuse
• Operator score: 0.2174 (Minimal)
• Geolocation signals from multiple sources
• One historical observation noted cloud infrastructure status

Temporal Indicators:

• Ownership changes: 0 (stable)
• Threat persistence days: 0
• Is persistently malicious: No

Thinking Process:

1. Analyze the Request:

* Task: Continue the IP intelligence briefing for IP 54.39.136.207 exactly where it left off.

* Constraint: Do not repeat text already written. Finish the remaining answer only.

* Role: IP intelligence analyst for IPDebrief (cybersecurity threat intelligence platform).

* Tone: Factual, professional, third person, past tense.

* Content: Based on the data returned by the tools (ipdebrief_profile, ipdebrief_neighbors, ipdebrief_relationships, ipdebrief_history, ipdebrief_actions).

* Goal: Produce a concise, actionable threat intelligence narrative suitable for a SOC analyst.

2. Review Previous Output:

* The previous output covered: Executive Summary, Network & Ownership Profile, Geolocation Assessment, Threat Intelligence Indicators, Neighborhood Analysis, DNS & Service Analysis, Historical Signal Analysis.

* The last section ended with: "Temporal Indicators: Ownership changes: 0 (stable); Threat persistence days: 0; Is persistently malicious: No"

* I need to continue from there. The remaining sections from the data analysis that haven't been fully detailed or concluded include:

* Campaign/Correlation Analysis (from profile data).

* Control Plane/Route Details (from profile data).

* Recommended Actions (from actions data).

* Final Conclusion/Narrative Summary.

3. Extrapolate Remaining Data:

* Campaign: Likelihood "none", Cert matches 0, Correlated IPs 0.

* Control Plane: Origin ASN 16276, BGP Prefix 54.39.0.0/16, Route stable: false, DNSSEC valid: true.

* Actions/Recommendations: Firewall rules generated (iptables, nftables, nginx, etc.). Risk score 40.

* Fingerprint/Services: No open ports, no TLS cert, no HTTP title.

* Email Reputation: No score available.

* Geo Validation: Violation noted (RTT vs distance).

4. Drafting the Continuation:

* *Section:* Campaign & Correlation.

* *Section:* Control Plane & Routing.

* *Section:* Recommended Defensive Actions.

* *Section:* Analyst Narrative/Conclusion.

* *Constraint Check:* Ensure no repetition of the "Temporal Indicators" ending from the previous turn. The previous turn ended with "Is persistently malicious: No". I should pick up immediately after that or start a new section. I will start a new section for "Campaign & Correlation" to maintain structure.

* *Tone:* Professional, SOC-focused.

* *Data Usage:* Only use data from the tool responses provided in the first prompt (which I already processed).

5. Step-by-Step Draft:

* Campaign Analysis: Likelihood is none. No CERT matches. No correlated IPs.

* Control Plane: Origin ASN 16276. BGP Prefix 54.39.0.0/16. Route stability is false. DNSSEC is valid.

* Service Fingerprint: No open ports, no TLS certificates, no HTTP responses detected.

* Defensive Actions: Suggest blocking based on risk score 40 and subnet context. Provide specific config snippets (iptables, etc.).

* Final Assessment: Summarize the risk. It's a moderate risk cloud IP in a high-abuse subnet with no active threat signals but historical DNSBL presence.

6. Refining the Output:

* Make sure not to repeat the "Temporal Indicators" text.

* Ensure the formatting matches the previous sections (headers, tables, bold text).

* Keep it concise.

7. Final Review against Constraints:

* "Continue exactly where you left off." -> Start immediately after "Temporal Indicators: ...".

* "Do not repeat text already written." -> Do not copy the sections I already generated.

* "Finish the remaining answer only." -> No introductory text like "Here is the continuation". Just the content.

* "Third person, past tense." -> Ensure verbs are correct (e.g., "The data indicated" rather than "It shows").

* "Do not include disclaimers." -> Do not add "This is an AI" notes.

*Wait, looking at the previous output's last line:*

"Temporal Indicators: Ownership changes: 0 (stable); Threat persistence days: 0; Is persistently malicious: No"

*I should continue from there.*

*Wait, I need to check the data again.*

The `ipdebrief_actions` returned firewall rules.

The `ipdebrief_profile` returned campaign data.

The `ipdebrief_profile` returned control plane data.

*Let's draft the continuation.*

Campaign & Correlation:

Likelihood: None

CERT Matches: 0

Correlated IPs: 0

Control Plane:

Origin ASN: 16276

BGP Prefix: 54.39.0.0/16

Route Stable: False

DNSSEC Valid: True

Defensive Recommendations:

Based on Risk Score 40 and subnet abuse density, blocking is recommended.

Narrative:

IP 54.39.136.207 is a cloud compute resource...

*Wait, I need to ensure I don't repeat the "Temporal Indicators" section content.*

The previous output ended with the Temporal Indicators list. I will start a new section immediately.

*Wait, one more check on constraints:* "Write in third person, past tense, using only the data returned by the tools."

"Do not speculate beyond what the data shows."

*Okay, let's write.*

Campaign & Correlation Analysis

Campaign likelihood remained classified as none. No CERT matches were recorded during the observation window. Correlated IPs count stood at zero.

Control Plane & Routing

The origin ASN was identified as 16276. The BGP prefix associated with the control plane was 54.39.0.0/16. Route stability was flagged as false. DNSSEC validation was confirmed as true.

Service Fingerprint

No open ports were detected. TLS certificates were absent. HTTP title extraction returned null. No server banners were captured.

Recommended Defensive Actions

The actions module generated firewall rules for multiple platforms.

- iptables: `iptables -A INPUT -s 54.39.136.207 -j DROP`

- nftables: `nft add rule inet filter input ip saddr 54.39.136.207 drop`

- nginx: `deny 54.39.136.207;`

- Cloud WAF: Block IP 54.39.136.207/32 with description referencing IPDebrief risk 40.

Operational Narrative

Analysis of IP 54.39.136.207 concluded that it resides within a high-abuse subnet (54.39.136.0/24) despite maintaining a moderate individual risk score. No active threat indicators were observed in the historical log. The control plane indicated route instability, while DNSSEC remained valid. Given the neighborhood abuse density of 0.6836 and the presence of 175 threat siblings, defensive posture should account for potential lateral movement or shared infrastructure risks. Blocking the address is recommended as a precautionary measure consistent with the subnet classification. The geolocation discrepancy (RTT vs Distance) suggests the need for further verification before assuming physical proximity in incident response contexts.

*Check:* Did I repeat anything?

Previous output ended with: "Temporal Indicators: Ownership changes: 0 (stable); Threat persistence days: 0; Is persistently malicious: No"

My continuation starts with "Campaign & Correlation Analysis". This is new content.

Did I repeat the "Risk Score 40" or "OVH" info? I mentioned Risk Score 40 and Risk Score 40 in the recommendations section. I mentioned OVH in the previous section. I should be careful not to redundantly define things I just defined, but since I'm moving to new sections (Campaign, Control Plane), it should be fine. I will avoid repeating the Network Profile details.

The "Recommended Defensive Actions" section contains specific rules found in `ipdebrief_actions`.

The "Operational Narrative" synthesizes the findings.

*Refining the "Operational Narrative" to be past tense and third person.*

"Analysis of IP 54.39.136.207 concluded..." -> "Analysis of IP 54.39.136.207 concluded..." (Past tense).

"

Final Assessment & Blocking Recommendation

Based on the aggregated profile, this IP is classified as a cloud hosting resource with moderate risk. While no active malicious campaigns were detected, the high-abuse subnet classification and historical DNSBL presence warrant conservative defensive handling.

Action:

• Recommended Action: Block at perimeter firewall and cloud WAF
• Risk Level: Moderate Risk (Score 40)
• Action Justification: Subnet abuse density 0.6836; 175 threat siblings in neighborhood

End of Briefing

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