IP Threat Report
20.91.140.156
ABUSE.MOM — BEHAVE OR GET EXPOSED
Geolocation & Classification
Detection Signatures
| Signature | Description | Points | Severity |
|---|---|---|---|
| 404 ratio 40-60% | Majority of requests returned 404 — enumeration | +15 | |
| Burst 103/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 109/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 113/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 116/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 119/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 123/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 135/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 143/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 149/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 176/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 182/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 200/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 29/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 31/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 33/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 34/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 37/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 39/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 41/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 43/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 44/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 46/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 48/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 51/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 52/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 55/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 57/2s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 92/10s | Abnormally fast request rate — automated scanning | +35 | |
| Burst 95/10s | Abnormally fast request rate — automated scanning | +35 | |
| Danger medium hits: 246 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 2887 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 292 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 307 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 34 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 369 | Medium-risk: admin panels, config files | +60 | |
| Danger medium hits: 438 | Medium-risk: admin panels, config files | +60 | |
| Danger strong hits: 10 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 18 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 2 | High-risk paths: shells, RCE vectors, exploits | +50 | |
| 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: 35 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 36 | High-risk paths: shells, RCE vectors, exploits | +100 | |
| Danger strong hits: 460 | 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 |
Observed Activity
Reconstructed HTTP requests from server access logs. Target domains redacted for security.
* Typical request patterns for detected signatures. Actual target domains are redacted.
Timeline
Network Provider
Recommendations
Actions taken & recommended
- IP 20.91.140.156 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 20.91.140.156: rate-limit 404 responses per IP, deploy a honeypot 404 page, ensure no backup files are web-accessible.
🌊 Traffic Flood Defense
IP 20.91.140.156 is generating excessive traffic. Limit connections per source IP. Enable geographic blocking if traffic from this region is unexpected.
🤖 User-Agent Anomaly Defense
IP 20.91.140.156 shows suspicious UA behavior. Block empty User-Agent requests. Implement JavaScript-based bot detection for sensitive endpoints.
Blacklist Status (DNSBL)
This IP was checked against major DNS-based blacklists used by mail servers and firewalls worldwide.
Checked: Spamhaus, SpamCop, Barracuda, SORBS, CBL, UCEProtect. Results may change over time.
Threat Analysis
20.91.140.156 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:
📊 Threat Analysis
IP address 20.91.140.156 has been traced to Gävle, Sweden, operating on the network of Microsoft Corporation. Our threat detection systems have flagged this address based on observed malicious behavior patterns. Our sensors captured 1,287 malicious requests from this address across a 3-day span, reflecting a sustained attack cadence of ~429 requests per day. The IP is classified as hosting/datacenter infrastructure, commonly associated with rented servers used for automated attack campaigns, botnet command-and-control, or vulnerability scanning at scale. The diversity of 3 separate attack methods suggests a comprehensive attack toolkit — likely an automated scanner that tests for vulnerabilities across multiple categories. A score of 280/100 places this address in the top tier of severity. Block and investigate any historical connections.
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.
Related Threats
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💡 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.
💡 Command Injection Techniques
Command injection occurs when attackers insert operating system commands through application inputs. Successful exploitation grants direct server access, enabling data theft, malware installation, and lateral movement across networks.