ABUSE.MOM
THREAT REPORT

IP Threat Report
158.158.51.236

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-05-30 07:56:06
First seen: 2026-03-30 18:00:05
Last seen: 2026-04-05 06:00:06
280

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 280/100. Total malicious requests observed: 53.

UA_SUSDANGER_PATHRATIO_404REDIRECT_PROBEBURST
01

Geolocation & Classification

IP Address
158.158.51.236
Type
Hosting
Country
🇪🇸 Spain
City
Madrid
ISP
Microsoft Corporation
Organization
Microsoft Azure Cloud (spaincentral)
Autonomous System
AS8075 Microsoft Corporation
Hit Count
53
02

Detection Signatures

SignatureDescriptionPointsSeverity
UA suspicious (short/empty)Behavioral anomaly detected by automated analysis+15
Danger strong hits: 6High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 286Medium-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: 35 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 107 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 31 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 106 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 42 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 152 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 9High-risk paths: shells, RCE vectors, exploits+100
Burst: 44 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 159 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 43 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 153 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 3High-risk paths: shells, RCE vectors, exploits+75
Danger medium hits: 134Medium-risk: admin panels, config files+60
Burst: 47 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 169 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 39 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 135 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 12High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 429Medium-risk: admin panels, config files+60
Burst: 132 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 171 req / 10sAbnormally fast request rate — automated scanning+35
Danger medium hits: 201Medium-risk: admin panels, config files+60
Burst: 104 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 2High-risk paths: shells, RCE vectors, exploits+50
Burst: 41 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 134 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 33 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 108 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 128 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 46 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 167 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 40 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 127 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 45 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 157 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 4High-risk paths: shells, RCE vectors, exploits+100
Burst: 116 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 34 req / 2sAbnormally fast request rate — automated scanning+35
Burst: 114 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 155 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 141 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 147 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 151 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 170 req / 10sAbnormally fast request rate — automated scanning+35
Danger medium hits: 262Medium-risk: admin panels, config files+60
Danger medium hits: 176Medium-risk: admin panels, config files+60
Burst: 161 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 160 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 154 req / 10sAbnormally fast request rate — automated scanning+35
Danger strong hits: 8High-risk paths: shells, RCE vectors, exploits+100
Danger medium hits: 264Medium-risk: admin panels, config files+60
Burst: 162 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 165 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 168 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 163 req / 10sAbnormally fast request rate — automated scanning+35
Burst: 166 req / 10sAbnormally fast request rate — automated scanning+35
Σ = 2635
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

2026-03-30 18:00:05
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: 6 (+100), Danger medium hits: 286 (+60)
2026-04-05 06:00:06
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 · 🇪🇸 Spain
06

Recommendations

Actions taken & recommended

  • IP 158.158.51.236 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 158.158.51.0/24
  • 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 158.158.51.236: maintain blocklist of known malicious UA strings, require consistent UA across sessions, implement TLS fingerprinting.

🔎 Directory Scan Defense

IP 158.158.51.236 is enumerating directories. Configure fail2ban apache-404 jail after 10+ 404 errors. Disable directory listings. Normalize all 404 responses.

🌊 Traffic Flood Defense

IP 158.158.51.236 is generating excessive traffic. Limit connections per source IP. Enable geographic blocking if traffic from this region is unexpected.

07

Neighbors in 158.158.51.0/24

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
zen.spamhaus.org
✓ Clean
bl.spamcop.net
✓ Clean
dnsbl-1.uceprotect.net
✓ 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

158.158.51.236 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 AnomalyPath EnumerationRequest Flooding

📊 Threat Analysis

Network traffic from 158.158.51.236, located in Madrid, Spain, operating on the network of Microsoft Corporation, has been classified as malicious by our automated threat scoring engine. During its 5-day observation window, we recorded 53 hostile requests from this IP — roughly 10.6 per day on average. This address belongs to a datacenter or cloud hosting provider. Hosting IPs are frequently leveraged by threat actors who rent cheap VPS instances specifically for conducting attacks. The combination of 3 distinct attack vectors indicates a sophisticated, multi-pronged threat actor deploying automated tools that probe multiple attack surfaces simultaneously. Our records show 101 malicious IPs originating from Spain, 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 Spain

158.173.36.160 (305)212.30.33.72 (305)45.67.99.32 (305)158.158.33.103 (280)158.158.105.51 (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

💡 User-Agent Analysis Techniques

Analyzing User-Agent strings reveals automated tools masquerading as legitimate browsers. Inconsistencies between claimed browser capabilities and actual behavior, impossible version combinations, and known scanner signatures help identify malicious clients.

💡 VPN Exit Node Reputation

VPN exit nodes aggregate traffic from many users, creating mixed reputation profiles. While legitimate users seek privacy, attackers exploit VPN services to anonymize malicious activity, making IP-based blocking of VPN nodes a complex policy decision.

🔍 Check Any IP Address

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