Is IP address 177.81.17.77 dangerous?

Yes, 177.81.17.77 is considered dangerous with a threat level of 8/10. It has been reported 10 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 177.81.17.77?

IP address 177.81.17.77 is operated by Claro NXT Telecomunicacoes Ltda (ASN 28573) and is geolocated to BR. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 177.81.17.77?

Yes, blocking 177.81.17.77 is strongly recommended. With a threat level of 8/10 and 10 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 177.81.17.77?

Our threat assessment for 177.81.17.77 has a confidence score of 72%, based on 10 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

177.81.17.77

IPv4 Public

AS28573

Claro NXT Telecomunicacoes Ltda

10 Reports

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Brazil Location

Claro NXT Telecomunicacoe... ASN 28573

10 Reports

Mixed Data Source

High Risk

IP 177.81.17.77 rated at threat level 8/10 based on 10 security reports.

Pattern analysis reveals concerning activity. Confidence: 72%.

More threatening than 92% of monitored IPs

Threat Categories

Brute-Force 10

Web App Attack 8

WP Login Brute Force 1

Technical Details

Brute-force attacks systematically attempt password combinations against authentication systems.

Recommended Mitigations

Implement rate limiting, account lockout policies, multi-factor authentication, and fail2ban.

Behavioral Analysis

Activity Pattern: Declining

Activity has decreased recently, suggesting remediation or threat actor migration.

First Observed 20. October 2026

Last Activity 26. October 2026

Recent (7 days) 10 incidents

Reputable Network

This IP is hosted on a network (ASN 28573) with generally good reputation. The ISP Claro NXT Telecomunicacoes Ltda maintains standard security practices.

The malicious activity may represent an isolated compromised system rather than systematic abuse.

Security Recommendations

Monitor closely and consider blocking. Escalation potential detected.

Continue monitoring the positive trend.

Reputation Summary

Threat Level 8/10 High

Critical

Activity Frequency 7/10 High

Confidence Score 72% High Confidence

Confidence History

20. Oct 2026 - 26. Oct 2026

72% Current

Stable Trend

Date	Categories	Source	Confidence
26. Oct 2026 New	WP Login Brute Force Brute-Force Web App Attack	Community x2	75%
25. Oct 2026	Brute-Force Web App Attack	Community	75%
23. Oct 2026	Brute-Force Web App Attack	Community	75%
22. Oct 2026	Brute-Force Web App Attack	Community	75%
21. Oct 2026	Brute-Force	Community	75%
20. Oct 2026	Brute-Force	Community	75%
20. Oct 2026	Brute-Force Web App Attack	Honeypot	75%
20. Oct 2026	Brute-Force Web App Attack	Honeypot	75%
20. Oct 2026	Brute-Force Web App Attack	Honeypot	75%
20. Oct 2026	Brute-Force Web App Attack	Community	75%

Basic Information

IP Address: 177.81.17.77
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class B

Geolocation

Country: BR
ASN: AS28573
ISP: Claro NXT Telecomunicacoes Ltda

DNS Information

Reverse DNS: b151114d.virtua.com.br
PTR Record: Yes
Connection Type: Static

Statistics

Total Reports: 10
First Reported: 26 Oct 2026
Last Reported: 26 Oct 2026, 08:52

Network Reputation

Analysis of the entire network (ASN) that this IP address belongs to, providing context about the hosting provider and network-wide threat patterns.

Network Identity

ASN: AS28573

Organization: Claro NXT Telecomunicacoes Ltda

Country:

Network Threat Assessment

3/10

This network appears to be relatively clean with very low threat indicators.

Network Statistics

Total IPs Monitored

600

Total Reports

9.5

Reports per IP

Network Context

This IP address belongs to Claro NXT Telecomunicacoes Ltda (AS28573), which manages 63 IP addresses in our monitoring system. Out of these, 600 have been reported for suspicious activities, resulting in a network-wide threat level of 3/10.

Network status: This network appears to be well-maintained with low threat indicators.

Comparative Analysis

How this IP compares to others in our threat intelligence database

92 %

Global Threat Ranking

This IP is more threatening than 92% of all IPs in our database.

Top 10% Most Dangerous

Global Comparison

Compared against 1,266,766 reported IPs worldwide

Threat Level 8/10 avg: 6.0 +

Total Reports 10 avg: 7 +

Network Comparison

Compared against 19,241 IPs in ASN 28573

Threat Level 8/10 network avg: 5.2 ++

Total Reports 10 network avg: 1 ++

Network Claro NXT Telecomunicacoes Ltda has overall threat level 3/10

Geographic Comparison

Compared against 257,691 IPs in BR

Threat Level 8/10 country avg: 5.2 ++

Total Reports 10 country avg: 2 ++

Daily report activity over the last 30 days showing patterns and peaks.

Peak Day 20 Oct 2026 5 reports

Daily Average 0.3 reports/day

Most Active Tuesday 5 reports

Evolution of threat level over time based on reported categories and frequency.

Initial Threat 6/10

Current Threat 6/10

Distribution of threat categories reported over time.

Top Threat Categories

Brute-Force 10

Web App Attack 8

WP Login Brute Force 1

Activity patterns showing when this IP is most active during the day and week.

Hourly Activity

Peak activity at 02:00 with 3 reports

Weekly Activity

Geographic Threat Distribution

1,154,121 threat incidents tracked globally • Last 24h: 31,244 Logs

FEED

Top Threat Sources

01

Brazil BR THIS IP

257,691 22.3%
02

United States US

195,923 17%
03

India IN

99,634 8.6%
04

China CN

48,880 4.2%
05

Argentina AR

41,684 3.6%
06

SC SC

29,371 2.5%
07

Mexico MX

27,147 2.4%
08

Russia RU

26,015 2.3%
09

Colombia CO

23,941 2.1%
10

Germany DE

21,791 1.9%

+40 more countries

THREAT LEVEL

LOW MED HIGH

IPs from the same Autonomous System (AS) network provider.

20 Related IPs

8.9/10 Avg Threat

81% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

High Risk

Threat Categories

Technical Details

Recommended Mitigations

Behavioral Analysis

Reputable Network

Security Recommendations

Basic Information

Geolocation

DNS Information

Statistics

Network Reputation

Network Identity

Network Threat Assessment

Network Statistics

Network Context

Global Threat Ranking

Top Threat Categories

Hourly Activity

Weekly Activity

FEED

Top Threat Sources

JSON Report

Firewall Rules

iptables / netfilter

UFW (Ubuntu)

Windows Firewall

Cloudflare

nginx

Apache .htaccess

PDF Report

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