Threat LevelMEDIUM27/1001 rule type
2 incidents on record · last seen 6d ago
| PTR | ip-187-90-151-56.user.vivozap.com.br |
| Org / ASN | TELEFÔNICA BRASIL S.A |
| Country | BR |
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 - 03:48 | high | Rule 100305: Web: 4xx error with browser-like UA |