47.128.121.130📋 Copy

# IP Intelligence Briefing: 47.128.121.130

## Executive Summary

The IP address 47.128.121.130 was classified as Moderate Risk (Risk Score: 40) during analysis. The address belongs to Amazon Web Services infrastructure in Singapore and operates as a cloud compute resource. While the IP itself shows no active threat indicators, the surrounding subnet exhibits high abuse density.

## Infrastructure Profile

Ownership: Amazon Data Services Singapore (ASN 16509, Netname: AMAZON-SIN)

Location: Singapore (ap-southeast-1 region)

Infrastructure Type: Cloud Compute (AWS EC2 instance)

Network Role: Firewall-enabled cloud hosting infrastructure with no services exposed

DNS Analysis:

• PTR Resolution: ec2-47-128-121-130.ap-southeast-1.compute.amazonaws.com
• Forward Resolution: Confirmed
• Email Authentication: SPF and DMARC records present
• Hosted Domains: None

## Threat Indicators

The IP address showed no direct threat indicators during assessment:

• Blacklist Count: 0
• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Known Campaigns: None identified
• DNSBL Listed: 1 of 8 total lists

## Neighborhood Context Analysis

The /24 subnet (47.128.121.0/24) demonstrated elevated abuse characteristics:

• Abuse Density: 0.5676 (High Abuse Classification)
• Total Siblings: 74 IP addresses
• Active Siblings: 45
• Threat Siblings: 42
• Inherited Risk Score: 22

The neighborhood exhibited 72 medium-risk and 7 low-risk addresses, with no high-risk classifications among neighbors. This pattern is consistent with AWS cloud infrastructure where legitimate cloud customers operate alongside potentially compromised instances.

## Historical Observation

Analysis of signal history across 23 observations revealed:

• Ownership stability maintained throughout observation period
• Cloud infrastructure classification consistent
• No ownership transfers detected
• Recent observations confirm cloud compute role

## Risk Assessment

The IP's risk profile (Score: 40) reflects the inherent risk associated with AWS cloud infrastructure rather than specific malicious activity. The absence of direct threat indicators suggests the address is part of legitimate cloud operations. However, the high-abuse neighborhood classification warrants contextual consideration for security policies.

## Recommended Actions

Based on the risk profile, the following firewall rules were generated:

iptables: `iptables -A INPUT -s 47.128.121.130 -j DROP`

nftables: `nft add rule inet filter input ip saddr 47.128.121.130 drop`

nginx: `deny 47.128.121.130;`

pfSense: Block 47.128.121.130/32

Cloudflare WAF: Block with description "IPDebrief risk score 40"

AWS WAF: Include 47.128.121.130/32 in rule set

## SOC Analyst Notes

• The IP represents legitimate AWS infrastructure (EC2 instance) in Singapore
• No evidence of direct malicious activity on this specific address
• Neighborhood abuse density suggests monitoring related subnet activity
• If traffic patterns indicate abuse, block at perimeter while maintaining logging
• Consider whitelisting if this IP represents a legitimate business relationship
• Correlate with other signals before implementing blocking rules per disclaimer

Classification: Moderate Risk - Cloud Infrastructure

Confidence Level: High (based on provider classification and DNS resolution)

Action Required: Context-dependent based on traffic analysis and business requirements

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