ABUSE.MOM
THREAT REPORT

IP Threat Report
181.43.209.133

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-10-26 17:23:12
First seen: 2026-10-18 20:25:46
Last seen: 2026-10-25 04:03:55
60

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 60/100. Total malicious requests observed: 131.

DANGER_PATHRATIO_404REFERER
01

Geolocation & Classification

IP Address
181.43.209.133
Type
Residential
Country
🇨🇱 CL
City
Santiago
ISP
Entel Chile S.A.
Organization
Entel Chile S.A
Autonomous System
AS27651 ENTEL CHILE S.A.
Hit Count
131
02

Detection Signatures

SignatureDescriptionPointsSeverity
404 ratio >= 60%Majority of requests returned 404 — enumeration+25
Danger strong hits: 1High-risk paths: shells, RCE vectors, exploits+25
Foreign refererReferer from unrelated external domain+10
Σ = 60
03

Observed Activity

Reconstructed HTTP requests from server access logs. Target domains redacted for security.

[redacted]
GET
/
200
Requests shown: 1 · HTTP 404: 0 · Dangerous patterns: 0

* Typical request patterns for detected signatures. Actual target domains are redacted.

04

Timeline

2026-10-18 20:25:46
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
404 ratio >= 60% (+25), Danger strong hits: 1 (+25), Foreign referer (+10)
2026-10-25 04:03:55
Last malicious request observed
Total score reached: 60/100
Next cycle
IP blocked — all subsequent requests denied (HTTP 403)
Added to blocklist automatically
05

Network Provider

Entel Chile S.A.
AS27651 · 🇨🇱 CL

We have detected 11 malicious IPs from this autonomous system.

View all IPs from AS27651 →
06

Recommendations

Actions taken & recommended

  • IP 181.43.209.133 is blocked at application level (HTTP 403)
  • Consider blocking at firewall level (iptables/CSF) to reduce server load
  • Report abuse to the network provider via their abuse contact
  • Ensure sensitive files (.env, .git, backups) are not accessible from the web

🔎 Path Enumeration Protection

Block scanning from 181.43.209.133: rate-limit 404 responses per IP, deploy a honeypot 404 page, ensure no backup files are web-accessible.

09

Blacklist Status (DNSBL)

This IP was checked against major DNS-based blacklists used by mail servers and firewalls worldwide.

✓ Clean
psbl.surriel.com
✓ Clean
cbl.abuseat.org
✓ Clean
dnsbl.dronebl.org
✓ Clean
bl.blocklist.de
✓ Clean
spam.dnsbl.sorbs.net
✓ Clean
zen.spamhaus.org
✓ Clean
b.barracudacentral.org

Checked: Spamhaus, SpamCop, Barracuda, SORBS, CBL, UCEProtect. Results may change over time.

10

Threat Analysis

181.43.209.133 has been assigned a threat score of 60/100 (High). The IP is rated as a high-level threat. Network administrators should implement blocking rules and monitor for any connections from this address.

The following attack categories were identified:

Path Enumeration

📊 Threat Analysis

Our monitoring infrastructure has identified 181.43.209.133, geolocated to Santiago, CL, operating on the network of Entel Chile S.A., as a source of suspicious network activity. Our sensors captured 131 malicious requests from this address across a 6-day span, reflecting a sustained attack cadence of ~21.8 requests per day. This residential IP is likely a compromised consumer device. Home routers and IoT equipment with default credentials are prime targets for botnet operators. Active path scanning has been detected — this IP probes for hundreds of common file and directory names. With 197 flagged addresses, CL represents a significant presence in our threat database. The score of 60/100 warrants active monitoring and rate-limiting. Full blocking is advisable for sensitive systems.

This IP is classified as residential, suggesting it may belong to a compromised home device, IoT botnet member, or an infected personal computer. Residential IPs involved in attacks often indicate malware infection without the owner's knowledge.

11

Related Threats

🇨🇱 Top threats from CL

34.176.224.191 (298)34.176.74.189 (288)34.176.119.40 (288)34.176.71.117 (288)34.176.192.57 (288)View all →

🏢 Same network: AS27651

200.111.120.226 (103)200.111.227.212 (83)181.43.121.110 (68)181.43.148.43 (68)181.42.184.126 (68)View all →
12

Security Intelligence

💡 HTTP Request Smuggling

Request smuggling exploits differences in how front-end and back-end servers parse HTTP requests. This technique can bypass security controls, poison web caches, and hijack other users sessions by desynchronizing request boundaries.

💡 Watering Hole Attack Strategy

Watering hole attacks compromise websites frequently visited by target organizations. Rather than attacking targets directly, adversaries infect trusted resources, exploiting the inherent trust users place in regularly visited sites.

🔍 Check Any IP Address

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