47.128.121.65📋 Copy

INTELLIGENCE BRIEFING: IP 47.128.121.65

Classification: Moderate Risk / High Neighborhood Risk

Date: 2026-06-20

Analyst: IPDebrief Intelligence Team

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**EXECUTIVE SUMMARY**

IP 47.128.121.65 is an Amazon Web Services (AWS) EC2 instance deployed in the Singapore region (ap-southeast-1). While the individual IP shows no direct threat indicators, it operates within a high-abuse subnet (47.128.121.0/24) where 59% of active sibling IPs (47 of 54) exhibit threat activity. The IP is classified as moderate risk (score: 40) but warrants monitoring due to neighborhood context.

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**INFRASTRUCTURE PROFILE**

• Provider: Amazon Web Services (ASN: AS16509)
• Organization: Amazon Data Services Singapore
• Geolocation: Singapore (ap-southeast-1 compute region)
• Infrastructure Type: CloudCompute / Hosting
• DNS Resolution: ec2-47-128-121-65.ap-southeast-1.compute.amazonaws.com
• Open Services: None detected (firewalled/no services)
• TLS/HTTP: No active web services or certificates

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**THREAT ASSESSMENT**

Individual Risk Indicators:

• Risk Score: 40 (Moderate)
• No direct threat indicators (no known campaigns, blacklists, or attacker signatures)
• Not identified as Tor exit, proxy, or spam source
• DNSBL: 1 listing out of 8 total (dnsblListedCount: 1)
• Operator Score: 0.2609 (Basic classification)

Neighborhood Risk Indicators:

• Subnet Classification: high_abuse
• Abuse Density: 0.5875 (elevated)
• Threat Siblings: 47 out of 54 active IPs (87% threat ratio)
• Inherited Risk Score: 23

Historical Signals (18 observations):

• Recent subnet abuse classification confirmed
• Geolocation inconsistencies detected (conflicting US/Singapore signals)
• Cloud infrastructure consistently verified across observations

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**RELATIONSHIP ANALYSIS**

• DNS Associations: Single EC2 hostname (ec2-47-128-121-65.ap-southeast-1.compute.amazonaws.com)
• Network Associations: AMAZON-SIN network segment
• Related Entities: 27 relationship records (primarily DNS/network associations)
• No organizational or certificate-based relationships detected

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**RECOMMENDED ACTIONS**

Immediate Recommendations:

1. Monitor Traffic — Block at perimeter if traffic patterns indicate malicious activity

2. Firewall Rules — Consider blocking based on neighborhood risk profile:

```bash

iptables -A INPUT -s 47.128.121.65 -j DROP

nft add rule inet filter input ip saddr 47.128.121.65 drop

```

3. WAF Integration — Configure Cloudflare/AWS WAF rules for IP 47.128.121.65/32

Contextual Guidance:

• Individual IP shows no direct malicious activity
• High neighborhood risk suggests potential compromise or abuse within the subnet
• AWS infrastructure status (firewalled/no services) reduces immediate exploitation risk
• Recommend correlating with local traffic logs before blocking

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**INTELLEIGENCE NOTES**

• Subnet 47.128.121.0/24 represents a dense concentration of potential abuse sources
• Consider blocking entire /24 subnet if operational risk tolerance permits
• Monitor for additional IPs in subnet showing similar threat indicators
• No persistent malicious activity observed for this specific IP

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END BRIEFING

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