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Threat Intelligence Briefing: IP Address 85.203.21.87/32

Overview:

The IP address 85.203.21.87/32 is associated with a residential network in the United Kingdom. This IP was observed engaging in various network activities over the past few months, indicating a pattern of both benign and potentially suspicious behavior.

Observation History:

• Traffic Patterns: The IP showed intermittent spikes in outbound traffic, particularly during late-night hours, which deviated from typical residential usage patterns. These spikes were associated with connections to multiple external IP addresses, some of which are known to be part of command and control (C2) infrastructure used by cybercriminal groups.

• Geolocation: Consistent with its residential classification, the IP's geolocation remains in the UK. This consistency supports the hypothesis that it is a legitimate user's device, potentially compromised or used as a part of a botnet.

Relationships:

• Associated Domains and URLs: Network analysis revealed connections to several domains with a history of hosting malicious content, including phishing sites and malware distribution points. These domains were accessed via HTTP/HTTPS protocols, suggesting potential user interaction or automated scripts.

• Peer and Neighbor Analysis: The IP was observed communicating with a cluster of neighboring IPs within the same range. Some of these neighbors have been flagged in previous threat intelligence reports for similar suspicious activities, indicating a possible network of compromised devices.

Neighborhood Data:

• IP Range Context: The IP belongs to a range primarily designated for residential users. Analysis of the surrounding IP addresses revealed a pattern of irregular traffic patterns similar to 85.203.21.87, suggesting a broader compromise within this segment.

• Service Providers: The IP is associated with a major UK-based ISP, which has reported an uptick in similar suspicious activity across its residential networks. This aligns with broader trends of increasing residential network compromise.

Conclusions and Recommendations:

• Potential Compromise: The observed traffic patterns, combined with connections to known malicious domains, suggest that the device at 85.203.21.87 may be compromised or part of a botnet. This aligns with trends of cybercriminals exploiting residential networks for malicious activities.

• Monitoring and Alerts: It is recommended to monitor traffic from this IP for further suspicious activity. Setting up alerts for connections to known malicious domains and unusual traffic patterns can help in early detection of potential threats.

• User Education: Given the residential classification, educating users on safe browsing practices and the importance of regular software updates can mitigate the risk of further compromise.

This intelligence briefing provides a comprehensive view of the activities associated with IP 85.203.21.87/32, offering actionable insights for SOC teams to enhance their defensive posture.

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