18.142.251.88📋 Copy

# IPDEBRIEF INTELLIGENCE BRIEFING

Subject: 18.142.251.88/32

Classification: Defensive Security Assessment

Date: Analysis completed based on current signal data

Status: MONITORED - Low Threat Profile

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## EXECUTIVE SUMMARY

IP address 18.142.251.88 is a legitimate Amazon Web Services EC2 instance deployed in Singapore (ap-southeast-1 region). The IP registers a moderate risk score of 40/100, primarily attributable to cloud infrastructure classification rather than malicious activity. No active threat indicators, malware campaigns, or known attacker signatures were observed. The IP is classified as a single-service host with SSH services enabled, consistent with standard cloud deployment patterns.

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## TECHNICAL PROFILE

Infrastructure Ownership:

• Organization: Amazon Data Services Singapore (AMAZON-SIN)
• ASN: 16509 (Amazon.com, Inc.)
• CIDR Block: 18.142.0.0/15
• Geolocation: Singapore (1.35°N, 103.82°E)

DNS Resolution:

• PTR Hostname: ec2-18-142-251-88.ap-southeast-1.compute.amazonaws.com
• Forward Resolution: Confirmed (amazonaws.com)
• Email Authentication: SPF and DMARC records present

Active Services:

• Port 22/TCP: SSH (OpenSSH_8.9p1 Ubuntu-3ubuntu0.15)
• TLS Certificate: None detected
• HTTP Services: None detected

Network Classification:

• Type: Cloud Infrastructure (AWS EC2)
• Connection Type: Single-Service Host
• Not Classified: CDN, VPN, Proxy, Tor Exit, or Hosting Service

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## THREAT INTELLIGENCE

Current Risk Assessment: Moderate Risk (Score: 40/100)

• Abuse Confidence Score: Not applicable (no active abuse signals)
• Blacklist Count: 0 active blacklist matches
• Known Campaigns: None detected
• Threat Feeds: No positive matches

DNSBL Status:

• Listed on 2 of 8 DNSBLs
• Classification: Basic operator score (0.2609)
• Route stability: Unstable (route changes observed in 30-day window)

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## OBSERVATION HISTORY (23 Signals)

Temporal Analysis:

• Most Recent Observation: 2026-06-21T17:34:48 UTC
• Observation Period: Signals observed across 2026-06-16 to 2026-06-21
• Threat Persistence: 0 days (no persistent malicious activity)
• Ownership Changes: 0 (stable infrastructure)

Signal Confidence Trends:

• Routing signals: 0.60 confidence
• Network role signals: 0.24 confidence
• Network classification: Clean subnet classification maintained
• Ownership verification: 0.85 confidence

No escalation in threat indicators observed over the monitoring period.

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## NETWORK RELATIONSHIPS

DNS Associations:

• Primary hostname: ec2-18-142-251-88.ap-southeast-1.compute.amazonaws.com

Network Relationships:

• Same network: AMAZON-SIN (18.142.0.0/15)
• No cross-organization relationships detected
• No certificate-based associations

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## SUBNET ANALYSIS (18.142.251.0.0/24)

Neighborhood Classification:

• Abuse Density: 0 (clean subnet)
• Total Siblings: 1 (18.142.251.88)
• Active Siblings: 1
• Threat Siblings: 0

No elevated risk observed in adjacent IP addresses.

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## SECURITY ACTIONS & RECOMMENDATIONS

Firewall/Blocking Decision: NO ACTION REQUIRED

Rationale:

• IP represents legitimate AWS cloud infrastructure
• No active threat indicators or malicious behavior detected
• Moderate risk score is inherent to cloud infrastructure classification
• No blocking or rate-limiting recommended

Monitoring Considerations:

• Monitor for changes in DNS resolution or hostname associations
• Track for any new services or port openings
• Observe for blacklist additions if previously clean

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## INTELLIGENCE CONCLUSION

IP 18.142.251.88 is a legitimate Amazon Web Services EC2 instance with no evidence of malicious activity. The moderate risk score (40/100) reflects standard cloud infrastructure risk factors rather than malicious intent. No security actions or blocking measures are warranted. SOC teams may classify this as a benign cloud asset requiring standard cloud traffic monitoring.

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