50.16.16.211📋 Copy

# IP Intelligence Briefing: 50.16.16.211/32

## Executive Summary

IP 50.16.16.211 is classified as High Risk with a risk score of 85/100. This AWS-managed EC2 instance (Ashburn, VA) is associated with known malware campaigns including Dridex and QakBot and appears on critical threat feeds. Immediate blocking and logging recommendations are provided.

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## Risk Profile

• Risk Score: 85/100 (High Risk)
• Provider Score: 0
• Authority Score: 0
• Stability Score: 0
• Reputation: High Risk

## Technical Infrastructure

## Threat Indicators

• Associated Campaigns: Dridex, QakBot
• Threat Feeds: Feodo Tracker, Cridex IPs
• Pulsedive Risk: Critical
• DNSBL Listings: 1 of 8 total lists
• Tor Exit Node: No
• Known Attacker: No (per profile)
• Spam Source: No

## Network Observations

• PTR Hostname: ec2-50-16-16-211.compute-1.amazonaws.com
• DNS Resolution: Forward confirmed (amazonaws.com)
• Associated Domains: linamar.bwired.support
• Email Auth: SPF and DMARC configured
• Open Ports: None detected
• Neighborhood Risk: Subnet 50.16.16.0/24 shows 1 threat sibling out of 2 active siblings

## Historical Signal Analysis

100 observations tracked. Recent ASN lookups (2026-06-21) show consistent AWS infrastructure (ASNs 14618 and 16509). All observations confirm US-based origin. Route stability is maintained with no route changes in the past 30 days.

## Intelligence Assessment

Despite being AWS-managed infrastructure, this IP demonstrates high-risk characteristics:

1. Campaign Correlation: Direct associations with Dridex and QakBot banking trojans

2. Feed Presence: Listed on Feodo Tracker and Cridex threat feeds

3. Critical Risk Rating: Pulsedive classification indicates critical-level threat activity

4. Email Infrastructure: Associated domain (linamar.bwired.support) may be leveraged for phishing campaigns

The combination of high risk score (85/100) and known malware campaign associations warrants immediate defensive action despite the IP's cloud infrastructure designation.

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## Recommended Security Actions

Immediate Blocking Rules

```bash

# iptables

iptables -A INPUT -s 50.16.16.211 -j DROP

# nftables

nft add rule inet filter input ip saddr 50.16.16.211 drop

# nginx

deny 50.16.16.211;

# pfSense

50.16.16.211/32

# Cloudflare WAF

{"description": "Block 50.16.16.211 — IPDebrief risk score 85", "action": "block", "filter": {"expression": "ip.src eq 50.16.16.211"}}

# AWS WAF

{"Addresses": ["50.16.16.211/32"], "Description": "IPDebrief risk 85"}

```

Monitoring Recommendations

Critical Severity: Increase logging verbosity and review recent activity from this IP source. The elevated risk score (85/100) combined with malware campaign associations requires enhanced scrutiny even though no open services are currently detected.

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## SOC Analyst Guidance

1. Block at perimeter immediately using provided firewall rules

2. Review logs for any recent connection attempts from this IP

3. Monitor for C2 activity given Dridex/QakBot campaign associations

4. Consider geo-blocking if traffic originates from the US (Ashburn, VA) and is unexpected

5. Update threat intel feeds to ensure this IP is captured in blocking lists

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6. Correlate with email logs given associated domain linamar.bwired.support shows email authentication records

7. Monitor for related IPs within the 50.16.0.0/16 prefix for coordinated activity patterns

## Conclusion

IP 50.16.16.211 represents a confirmed high-risk infrastructure point tied to active malware campaigns. While hosted on AWS infrastructure, the critical threat indicators and campaign associations justify immediate blocking. The IP should be treated as malicious until further investigation confirms otherwise.

## Next Steps

1. Implement firewall blocks within 1 hour

2. Alert SOC team for log review correlation

3. Add IP to internal threat intel blocklist

4. Monitor for lateral activity from associated network range

## Data Source Attribution

• Threat Intelligence Platform: IPDebrief
• Risk Classification: High Risk (85/100)
• Last Updated: 2026-06-21T20:04:43+00:00
• Confidence Level: 0.85

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*End of Intelligence Briefing*

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