ABUSE.MOM
THREAT REPORT

IP Threat Report
87.197.146.56

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-10-25 02:01:47
First seen: 2026-09-21 17:56:20
Last seen: 2026-09-27 01:36:52
203

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 203/100. Total malicious requests observed: 135.

BURSTDANGER_PATHMETHODUA_CHANGED
01

Geolocation & Classification

IP Address
87.197.146.56
Type
Residential
Country
🇸🇰 SK
City
Bratislava
ISP
Slovak Telecom AS6855
Organization
Slovak Telekom, a.s.
Autonomous System
AS6855 Slovak Telekom, a.s.
Hit Count
135
02

Detection Signatures

SignatureDescriptionPointsSeverity
Burst 19/10sAbnormally fast request rate — automated scanning+35
Burst 6/2sAbnormally fast request rate — automated scanning+35
Danger strong hits: 23High-risk paths: shells, RCE vectors, exploits+100
POST seenBehavioral anomaly detected by automated analysis+8
UA changedMultiple User-Agents — bot rotation technique+25
Σ = 203
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

2026-09-21 17:56:20
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
Burst 19/10s (+35), Burst 6/2s (+35), Danger strong hits: 23 (+100)
2026-09-27 01:36:52
Last malicious request observed
Total score reached: 203/100
Next cycle
IP blocked — all subsequent requests denied (HTTP 403)
Added to blocklist automatically
05

Network Provider

Slovak Telecom AS6855
AS6855 · 🇸🇰 SK

We have detected 3 malicious IPs from this autonomous system.

View all IPs from AS6855 →
06

Recommendations

Actions taken & recommended

  • IP 87.197.146.56 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

🌊 Flood / DDoS Mitigation

Implement limit_req_zone in nginx. Deploy CDN with DDoS protection. Configure SYN cookies and connection tracking to throttle 87.197.146.56.

🤖 Bot Detection

Address UA spoofing from 87.197.146.56: 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
bl.blocklist.de
✓ Clean
cbl.abuseat.org
✓ Clean
zen.spamhaus.org
✓ Clean
spam.dnsbl.sorbs.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

87.197.146.56 has been assigned a threat score of 203/100 (Critical). This represents a critical risk level. Our detection systems have flagged multiple high-confidence indicators of malicious intent from this address.

The following attack categories were identified:

Request FloodingUser-Agent Anomaly

📊 Threat Analysis

IP address 87.197.146.56 has been traced to Bratislava, SK, operating on the network of Slovak Telecom AS6855. Our threat detection systems have flagged this address based on observed malicious behavior patterns. Over a period of 5 days, this IP generated 135 malicious requests, averaging approximately 27 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 47 flagged addresses, SK represents a notable presence in our threat database. A score of 203/100 places this address in the top tier of severity. Block and investigate any historical connections.

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 SK

66.56.86.15 (305)66.56.86.17 (270)213.81.146.197 (240)81.162.80.35 (178)188.123.100.234 (140)View all →

🏢 Same network: AS6855

213.81.146.197 (240)178.41.209.80 (60)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.

💡 DNS Amplification Attack Mechanics

DNS amplification exploits open resolvers to reflect and amplify traffic toward victims. A small query triggers a large response directed at the spoofed source IP, achieving amplification factors of 50x or more, overwhelming target bandwidth.

🔍 Check Any IP Address

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