ABUSE.MOM
THREAT REPORT

IP Threat Report
51.103.130.144

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-05-30 09:01:47
First seen: 2026-04-17 23:00:05
Last seen: 2026-04-18 23:00:07
280

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 280/100. Total malicious requests observed: 38.

UA_SUSDANGER_PATHBURSTRATIO_404REDIRECT_PROBE
01

Geolocation & Classification

IP Address
51.103.130.144
Type
Hosting
Country
🇨🇭 Switzerland
City
Zurich
ISP
Microsoft
Organization
Microsoft Azure Cloud (switzerlandnorth)
Autonomous System
AS8075 Microsoft Corporation
Hit Count
38
02

Detection Signatures

SignatureDescriptionPointsSeverity
UA suspicious (short/empty)Behavioral anomaly detected by automated analysis+15
Danger strong hits: 12High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 90Medium-risk: admin panels, config files+60
Burst: 65 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 120 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 9High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 60Medium-risk: admin panels, config files+60
Burst: 90 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 50 req / 2sAbnormally fast request rate — automated scanning+35
Danger strong hits: 4High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 56Medium-risk: admin panels, config files+60
404 ratio 40-60%Majority of requests returned 404 — enumeration+15
Probe pattern 302->404 same pathBehavioral anomaly detected by automated analysis+20
Burst: 29 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 58 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 2High-risk paths: shells, RCE vectors, exploits+50
Danger medium hits: 28Medium-risk: admin panels, config files+60
Burst: 30 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 6High-risk paths: shells, RCE vectors, exploits+100
Burst: 60 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 60 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 66 req / 2sAbnormally fast request rate — automated scanning+35
Danger strong hits: 3High-risk paths: shells, RCE vectors, exploits+75
Danger medium hits: 26Medium-risk: admin panels, config files+60
Burst: 40 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 42 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 57 req / 2sAbnormally fast request rate — automated scanning+35
Danger medium hits: 24Medium-risk: admin panels, config files+60
Burst: 23 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 24 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 1High-risk paths: shells, RCE vectors, exploits+25
Danger medium hits: 1Medium-risk: admin panels, config files+10
Burst: 30 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 32 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 36 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 22 req / 2sAbnormally fast request rate — automated scanning+35
Danger medium hits: 36Medium-risk: admin panels, config files+60
Burst: 42 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 46 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 39 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 39 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 21 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 22 req / 10sAbnormally fast request rate — automated scanning+35
Danger medium hits: 2Medium-risk: admin panels, config files+20
Danger strong hits: 8High-risk paths: shells, RCE vectors, exploits+100
Burst: 26 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 26 req / 10sAbnormally fast request rate — automated scanning+35
Danger medium hits: 22Medium-risk: admin panels, config files+60
Burst: 33 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 33 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 32 req / 2sAbnormally fast request rate — automated scanning+35
Danger strong hits: 16High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 33Medium-risk: admin panels, config files+60
Burst: 44 req / 10sAbnormally fast request rate — automated scanning+35
Σ = 2455
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

2026-04-17 23:00:05
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
UA suspicious (short/empty) (+15), Danger strong hits: 12 (+100), Danger medium hits: 90 (+60)
2026-04-18 23:00:07
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
AS8075 · 🇨🇭 Switzerland
06

Recommendations

Actions taken & recommended

  • IP 51.103.130.144 is blocked at application level (HTTP 403)
  • Consider blocking at firewall level (iptables/CSF) to reduce server load
  • Other malicious IPs detected in the same /24 subnet — consider blocking 51.103.130.0/24
  • Report abuse to the network provider via their abuse contact
  • Ensure sensitive files (.env, .git, backups) are not accessible from the web

🤖 Bot Detection

Address UA spoofing from 51.103.130.144: maintain blocklist of known malicious UA strings, require consistent UA across sessions, implement TLS fingerprinting.

🌊 Flood / DDoS Mitigation

Implement limit_req_zone in nginx. Deploy CDN with DDoS protection. Configure SYN cookies and connection tracking to throttle 51.103.130.144.

🔎 Path Enumeration Protection

Block scanning from 51.103.130.144: rate-limit 404 responses per IP, deploy a honeypot 404 page, ensure no backup files are web-accessible.

07

Neighbors in 51.103.130.0/24

Other blocked IPs from the same /24 subnet — indicates systematic abuse from this network range.

09

Blacklist Status (DNSBL)

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

✓ Clean
ix.dnsbl.manitu.net
✓ Clean
dnsbl.sorbs.net
✓ Clean
bl.spamcop.net
✓ Clean
dnsbl-1.uceprotect.net
✓ Clean
zen.spamhaus.org
✓ Clean
b.barracudacentral.org
✓ Clean
truncate.gbudb.net
✓ Clean
psbl.surriel.com

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

10

Threat Analysis

51.103.130.144 has been assigned a threat score of 280/100 (Critical). With this rating, the IP falls into the critical severity bracket — among the most dangerous addresses in our monitoring database.

The following attack categories were identified:

User-Agent AnomalyRequest FloodingPath Enumeration

📊 Threat Analysis

51.103.130.144 is registered in Zurich, Switzerland, operating on the network of Microsoft. This IP first appeared in our threat feeds after triggering multiple behavioral detection signatures. The address has been active for 1 days in our monitoring system, producing 38 flagged requests at a rate of ~38/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. Our records show 102 malicious IPs originating from Switzerland, positioning it as a significant contributor to global threat activity. 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

🇨🇭 Top threats from Switzerland

51.107.69.151 (280)20.250.10.152 (280)20.203.180.135 (280)20.203.136.132 (280)20.203.129.217 (280)View all →

🏢 Same network: AS8075

74.241.249.229 (340)20.151.111.128 (308)4.182.24.88 (285)20.65.61.3 (283)4.205.39.97 (283)View all →
12

Security Intelligence

💡 HTTP Header Analysis for Threat Detection

Examining HTTP headers beyond User-Agent reveals attack tools and automated scripts. Missing standard headers, unusual ordering, non-standard values, and inconsistencies with claimed client identity all serve as reliable detection signals.

💡 Content Security Policy Implementation

Content Security Policy headers instruct browsers to restrict resource loading, mitigating XSS and data injection attacks. Properly configured CSP policies prevent inline script execution, restrict iframe embedding, and control which domains can serve content.

🔍 Check Any IP Address

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