ABUSE.MOM
THREAT REPORT

IP Threat Report
45.156.128.39

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-10-29 18:45:17
First seen: 2026-10-29 04:58:01
Last seen: 2026-10-29 18:41:11
118

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 118/100. Total malicious requests observed: 57.

BOT_UABURSTMETHODREFERERUA_CHANGED
01

Geolocation & Classification

IP Address
45.156.128.39
Type
Residential
Country
🇳🇱 Netherlands
City
Amsterdam
ISP
NSEC - Sistemas Informaticos, S.A.
Organization
Inap AMS
Autonomous System
AS211680 NSEC - Sistemas Informaticos, S.A.
Hit Count
57
02

Detection Signatures

SignatureDescriptionPointsSeverity
Burst 5/2sAbnormally fast request rate — automated scanning+35
Foreign refererReferer from unrelated external domain+10
POST seenBehavioral anomaly detected by automated analysis+8
UA bot: pythonKnown bot/crawler User-Agent detected+40
UA changedMultiple User-Agents — bot rotation technique+25
Σ = 118
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

2026-10-29 04:58:01
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
Burst 5/2s (+35), Foreign referer (+10), POST seen (+8)
2026-10-29 18:41:11
Last malicious request observed
Total score reached: 118/100
Next cycle
IP blocked — all subsequent requests denied (HTTP 403)
Added to blocklist automatically
05

Network Provider

NSEC - Sistemas Informaticos, S.A.
AS211680 · 🇳🇱 Netherlands

We have detected 74 malicious IPs from this autonomous system.

View all IPs from AS211680 →
06

Recommendations

Actions taken & recommended

  • IP 45.156.128.39 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 45.156.128.0/24
  • Report abuse to the network provider via their abuse contact
  • Ensure sensitive files (.env, .git, backups) are not accessible from the web

🌊 Traffic Flood Defense

IP 45.156.128.39 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 45.156.128.39: maintain blocklist of known malicious UA strings, require consistent UA across sessions, implement TLS fingerprinting.

07

Neighbors in 45.156.128.0/24

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
spam.dnsbl.sorbs.net
✓ Clean
cbl.abuseat.org
✓ Clean
bl.blocklist.de
✓ Clean
zen.spamhaus.org
✓ Clean
bl.spamcop.net
✓ 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

45.156.128.39 has been assigned a threat score of 118/100 (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:

Request FloodingUser-Agent Anomaly

📊 Threat Analysis

Network traffic from 45.156.128.39, located in Amsterdam, Netherlands, operating on the network of NSEC - Sistemas Informaticos, S.A., has been classified as malicious by our automated threat scoring engine. Over a period of 1 days, this IP generated 57 malicious requests, averaging approximately 57 requests per day. The address is classified as residential, meaning it likely belongs to an end-user ISP connection. Malicious activity from residential IPs typically indicates device compromise or botnet membership. The dual attack vectors of Request Flooding combined with User-Agent Anomaly indicate a coordinated assault rather than opportunistic scanning. With 2,885 flagged addresses, Netherlands represents a major presence in our threat database. At 118/100, this is an extremely high-risk address. All traffic should be considered hostile.

This IP is classified as residential, suggesting it may belong to a compromised home device, IoT botnet member, or an infected personal computer. Residential IPs involved in attacks often indicate malware infection without the owner's knowledge.

11

Related Threats

🇳🇱 Top threats from Netherlands

91.92.43.144 (358)91.92.43.186 (358)91.92.43.190 (358)91.92.43.157 (358)91.92.43.153 (358)View all →

🏢 Same network: AS211680

45.156.128.102 (165)45.156.128.173 (155)45.156.128.156 (155)45.156.128.171 (155)45.156.128.114 (155)View all →
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.

💡 Satellite Internet Security

Satellite internet introduces unique security challenges including high latency that affects real-time threat detection, shared bandwidth that enables traffic sniffing, and coverage areas that cross multiple jurisdictions complicating legal response.

🔍 Check Any IP Address

Share this report: