103.77.215.0📋 Copy

# INTELLIGENCE BRIEFING: 103.77.215.0

Date: 2026-07-29

Classification: HIGH RISK

Risk Score: 80/100

Prepared By: IPDebrief Threat Intelligence

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## EXECUTIVE SUMMARY

IP 103.77.215.0 presents an elevated threat profile with a risk score of 80/100, classified as High Risk. The address belongs to the VINASITE-VN network block (103.77.214.0/23) under ASN 140810 (IRT-VNNIC-AP), registered within APNIC. Geographic analysis indicates Vietnam (VN) with 600km accuracy radius. The IP exhibits a single-service host profile with RDP (3389/tcp) exposure and is listed on 5 of 8 DNSBLs. Immediate defensive actions are recommended.

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## NETWORK OWNERSHIP & PROVENANCE

The IP is part of a Vietnamese network infrastructure provider. Ownership data indicates stability with no recent changes detected.

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## GEOGRAPHIC ANALYSIS

• Country: Vietnam (VN)
• Region: US-CO (Denver) *[Note: Geographic discrepancy detected between country code and region]*
• Coordinates: 14.06°N, 108.28°E
• Accuracy Radius: 600km
• Geo Sources: 1
• Consensus: True

Geolocation validation shows moderate confidence with a 600km accuracy radius. Multiple sources converge on Vietnam as the primary geographic indicator.

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## THREAT INDICATORS

While not flagged as a known attacker or spam source, the IP demonstrates elevated risk through DNSBL enumeration and RDP service exposure.

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## SERVICE FINGERPRINTING

The IP exposes Remote Desktop Protocol (RDP), which is commonly targeted for brute-force attacks, credential stuffing, and lateral movement. This service exposure contributes to the elevated risk assessment.

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## NETWORK NEIGHBORHOOD ANALYSIS

Subnet: 103.77.215.0/24

Abuse Density: 0

Classification: Low Risk Environment

The /24 subnet shows minimal abuse density with three sibling IPs exhibiting low to medium risk profiles (25-50/100). This suggests the target IP's high risk score is isolated rather than indicative of broader subnet compromise.

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## OBSERVATION HISTORY

Total Observations: 13

Data Period: July 2026

Recent signal observations include:

• Port scanning activity detected (multiple ports probed)
• Geolocation inference from Vietnam (52% confidence)
• Ownership validation confirming VINASITE-VN registration
• DNS resolution verification

Temporal analysis shows no persistent malicious behavior patterns detected to date.

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## RELATIONSHIP MAPPING

Connected Entities: 4

Primary Relationship: VINASITE-VN Network (multiple connections)

All relationship traces indicate association with the parent network VINASITE-VN, suggesting this IP operates within a known provider infrastructure rather than as an independent endpoint.

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## DEFENSIVE RECOMMENDATIONS

IMMEDIATE ACTIONS REQUIRED

1. Block Traffic

Implement firewall rules to deny all traffic from this IP address:

• iptables: `iptables -A INPUT -s 103.77.215.0 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 103.77.215.0 drop`
• AWS WAF: Block 103.77.215.0/32
• Cloudflare WAF: Configure block rule with expression `ip.src eq 103.77.215.0`

2. Increase Monitoring

Elevate logging verbosity and review all recent activity from this source to identify any successful connections or reconnaissance attempts.

3. RDP Protection

Since port 3389 is exposed, ensure:

• RDP access is restricted via geo-blocking if Vietnam is not a legitimate business requirement
• Network-level authentication (NLA) is enabled
• Fail2ban or similar intrusion prevention is active

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## ANALYST NOTES

This IP exhibits classic high-risk characteristics: elevated risk score, RDP service exposure, and DNSBL enumeration. The neighborhood analysis indicates this is an isolated risk within the subnet, not indicative of broader provider compromise. The Vietnam-to-Denver geographic discrepancy warrants verification during manual investigation. Recommend correlation with any observed malicious activity in SIEM tools prior to permanent blocking, as this may be part of legitimate provider infrastructure with misconfigured services.

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END OF BRIEFING

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