THREAT REPORT
IP Threat Report
191.237.255.150
ABUSE.MOM — BEHAVE OR GET EXPOSED
01
Geolocation & Classification
IP Address
191.237.255.150
Type
Hosting
Country
🇧🇷 Brazil
City
São Paulo
ISP
Microsoft Corporation
Organization
Microsoft Azure Cloud (brazilsouth)
Autonomous System
AS8075 Microsoft Corporation
Hit Count
16568
02
Detection Signatures
| Signature | Description | Points | Severity |
|---|---|---|---|
| 404 ratio 40-60% | Majority of requests returned 404 — enumeration | +15 | |
| 404 ratio >= 60% | Majority of requests returned 404 — enumeration | +25 | |
| Burst 10/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 11/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 12/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 13/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 14/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 15/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 32/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 36/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 47/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 48/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 49/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 50/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 51/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 8/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 9/2s | Abnormally fast request rate — automated scanning | +35 | |
| Danger medium hits: 1 | Medium-risk: admin panels, config files | +10 | |
| Danger medium hits: 10 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 100 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 110 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 117 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 120 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 126 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 127 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 130 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 132 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 138 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 140 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 142 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 144 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 148 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 150 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 178 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 180 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 188 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 192 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 198 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 2 | Medium-risk: admin panels, config files | +20 | |
| Danger medium hits: 200 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 202 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 210 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 216 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 220 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 221 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 222 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 226 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 239 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 240 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 252 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 258 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 268 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 276 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 278 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 279 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 285 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 289 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 295 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 296 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 298 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 300 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 320 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 322 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 330 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 332 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 340 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 36 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 378 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 379 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 4 | Medium-risk: admin panels, config files | +40 | |
| Danger medium hits: 48 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 522 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 572 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 58 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 596 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 6 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 60 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 602 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 644 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 656 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 68 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 717 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 72 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 75 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 78 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 786 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 792 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 817 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 82 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 89 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 903 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 91 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 98 | Medium-risk: admin panels, config files | +60 | |
| Danger strong hits: 1 | High-risk paths: shells, RCE vectors, exploits | +25 | |
| Danger strong hits: 10 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 100 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 102 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 11 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 117 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 12 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 128 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 13 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 132 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 14 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 15 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 16 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 18 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 19 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 2 | High-risk paths: shells, RCE vectors, exploits | +50 | |
| Danger strong hits: 20 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 21 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 22 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 24 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 26 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 27 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 28 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 3 | High-risk paths: shells, RCE vectors, exploits | +75 | |
| Danger strong hits: 30 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 32 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 34 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 36 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 37 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 38 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 39 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 4 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 40 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 42 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 43 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 48 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 50 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 56 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 6 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 7 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 78 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 8 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 82 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 9 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 90 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 96 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 99 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Probe 302→404 | Behavioral anomaly detected by automated analysis | +20 | |
| UA suspicious | Behavioral anomaly detected by automated analysis | +15 |
Σ = 9600
03
Observed Activity
Reconstructed HTTP requests from server access logs. Target domains redacted for security.
[redacted]
GET
/
200
[redacted]
GET
/page
200
Requests shown: 2 · HTTP 404: 0 · Dangerous patterns: 0
* Typical request patterns for detected signatures. Actual target domains are redacted.
04
Timeline
2026-07-03 12:57:09
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
404 ratio 40-60% (+15), 404 ratio >= 60% (+25), Burst 10/10s (+35)
2026-07-12 00:58:00
Last malicious request observed
Total score reached: 280/100
Next cycle
IP blocked — all subsequent requests denied (HTTP 403)
Added to blocklist automatically
05
Network Provider
Microsoft Corporation
AS8075 · 🇧🇷 Brazil
06
Recommendations
Actions taken & recommended
- IP 191.237.255.150 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
🔎 Directory Scan Defense
IP 191.237.255.150 is enumerating directories. Configure fail2ban apache-404 jail after 10+ 404 errors. Disable directory listings. Normalize all 404 responses.
🌊 Traffic Flood Defense
IP 191.237.255.150 is generating excessive traffic. Limit connections per source IP. Enable geographic blocking if traffic from this region is unexpected.
🤖 Bot Detection
Address UA spoofing from 191.237.255.150: maintain blocklist of known malicious UA strings, require consistent UA across sessions, implement TLS fingerprinting.
09
Blacklist Status (DNSBL)
This IP was checked against major DNS-based blacklists used by mail servers and firewalls worldwide.
✓ Clean
spam.dnsbl.sorbs.net
✓ Clean
cbl.abuseat.org
✓ Clean
bl.spamcop.net
✓ Clean
bl.blocklist.de
✓ Clean
zen.spamhaus.org
✓ Clean
b.barracudacentral.org
✓ Clean
dnsbl.dronebl.org
✓ Clean
psbl.surriel.com
Checked: Spamhaus, SpamCop, Barracuda, SORBS, CBL, UCEProtect. Results may change over time.
10
Threat Analysis
191.237.255.150 has been assigned a threat score of 280/100 (Critical). This is a critical-level threat. Systems administrators should treat this IP as hostile and block all inbound connections without exception.
The following attack categories were identified:
Path EnumerationRequest FloodingUser-Agent Anomaly
📊 Threat Analysis
Network traffic from 191.237.255.150, located in São Paulo, Brazil, operating on the network of Microsoft Corporation, has been classified as malicious by our automated threat scoring engine. During its 8-day observation window, we recorded 16,568 hostile requests from this IP — roughly 2071 per day on average. Classified as a hosting IP, this address likely runs on a rented server or cloud instance. Attackers prefer datacenter IPs for their high bandwidth and disposable nature. The diversity of 3 separate attack methods suggests a comprehensive attack toolkit — likely an automated scanner that tests for vulnerabilities across multiple categories. With 102 flagged addresses, Brazil represents a significant presence in our threat database. At 280/100, this is an extremely high-risk address. All traffic should be considered hostile.
This IP belongs to a hosting or data center provider. Malicious traffic from hosting infrastructure often originates from compromised VPS instances, rented servers used for scanning campaigns, or abused free-tier cloud accounts. Hosting providers typically respond to abuse reports within 24-72 hours.
11
Related Threats
12
Security Intelligence
💡 DDoS Mitigation Approaches
Distributed denial of service attacks overwhelm infrastructure with traffic volume. Effective mitigation combines always-on traffic scrubbing, anycast network distribution, rate limiting, and the ability to quickly scale absorption capacity during attacks.
💡 IPv6 Scanning Challenges
The vast IPv6 address space makes traditional sequential scanning impractical. However, attackers use DNS records, certificate transparency logs, and predictable address patterns to identify active IPv6 hosts, adapting their techniques to the expanded address space.
🔍 Check Any IP Address
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