Threat LevelMEDIUM27/1001 rule type
2 incidents on record · last seen 6d ago
| PTR | 187-111-153-239.caiweb.net.br |
| Org / ASN | Caezar Provedor de Internet EIRELI |
| Country | 🇧🇷 Brazil |
| City | São Sebastião do Caí, Rio Grande do Sul |
| Timezone | America/Sao_Paulo |
Attack Analysis
Reconnaissance Behind Browser Disguise
This IP generated repeated HTTP 4xx errors (404/403) while spoofing a legitimate browser User-Agent (Chrome, Firefox). Real browsers do not repeatedly trigger 4xx errors in rapid succession — this is an automated scanner disguised as human traffic to evade bot detection.
Reports (2)
| Date | Severity | Description |
|---|---|---|
| 27 May 2026 - 10:42 | high | Rule 100305: Web: 4xx error with browser-like UA |
| 27 May 2026 - 04:23 | high | Rule 100305: Web: 4xx error with browser-like UA |