Threat Intelligence Briefing: IP 187.120.73.73/32
Overview:
- Risk Profile: Moderate Risk (Risk Score: 55)
- Ownership: Registered to MASTER S/A (ASN 28202) in Brazil (Minas Gerais, Delfim Moreira).
- Network Role: Firewalled / No Services (no open ports or TLS certificates detected).
- Geolocation: Consistent with Brazil, but DNS geolocation shows inferred location in São Paulo with 2500km accuracy radius.
Threat Indicators:
- No direct malicious indicators (no abuse confidence scores, blacklist entries, or known campaigns).
- Subnet abuse density: 17.9% (moderate risk).
- High-risk neighbors include IPs with risk scores up to 80 (e.g., 187.120.73.121, 187.120.73.173).
Observation History:
- First recorded on June 2, 2026, as part of a network associated with a data center in São Paulo.
- No persistent threat activity detected; observed as a static, non-malicious IP.
Network Relationships:
- Linked to ASN 28202 (MASTER S/A) and network block 187.120.64.0/18.
- Subnet 187.120.73.0/24 contains 39 IPs, with 7 high-risk, 30 medium-risk, and 2 low-risk neighbors.
Actionable Intelligence:
1. Monitor Subnet Activity: The IPβs subnet contains high-risk neighbors (e.g., 187.120.73.121, 187.120.73.173). Investigate potential lateral movement or shared infrastructure risks.
2. Verify Geolocation Anomalies: The IPβs DNS geolocation suggests São Paulo, but its inferred location is inconsistent with its registered region. Validate with additional probes.
3. Secure Network Segmentation: Ensure the IPβs firewalled nature is maintained, and restrict access to critical systems due to its proximity to higher-risk assets.
Conclusion:
This IP is likely a data center server in Brazil with no direct malicious activity. However, its subnetβs mixed risk profile warrants closer monitoring. SOC teams should prioritize isolating high-risk neighbors and verifying geolocation discrepancies.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
π’ Ownership & Registration
| Organization | MASTER S/A |
| ASN | AS28202 |
| Network Name | 139887 |
| CIDR Block | 187.120.64.0/18 |
| RIR | LACNIC |
| Country | BR |
| Abuse Contact | β |
π DNS Intelligence
| PTR | 187-120-73-73.pso-fb.mastercabo.com.br |
| Forward Confirmed | No β PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 187-120-73-73.pso-fb.mastercabo.com.br |
π DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
βοΈ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown β Insufficient routing data to classify |
π Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Server | β |
| HTTP Title | β |
π TLS Certificate
| SANs | None |
| Valid From | β |
| Valid Until | β |
π― Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 26% | 2 | 3 |
| routing | 17% | 1 | 1 |
| services | 11% | 1 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 23% | 1 | 3 |
| geolocation | 32% | 2 | 3 |
| Overall | 21% | 9 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
π Observation Timeline π Live
| First Seen | 2026-05-07 23:04:02 UTC |
| Last Seen | 2026-06-25 01:47:47 UTC |
| Profile Built | 2026-06-23 01:56:25 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 26 |
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