ABUSE.MOM
THREAT REPORT

IP Threat Report
159.89.18.16

ABUSE.MOM — BEHAVE OR GET EXPOSED

Generated: 2026-10-25 21:39:32
First seen: 2026-09-16 10:30:44
Last seen: 2026-09-20 02:11:43
105

⛔ Verdict: BLOCK

This IP address has been classified as a source of malicious automated activity. Threat score: 105/100. Total malicious requests observed: 96.

BURSTREFERERUA_CHANGED
01

Geolocation & Classification

IP Address
159.89.18.16
Type
Hosting
Country
🇩🇪 Germany
City
Frankfurt am Main
ISP
DigitalOcean, LLC
Organization
DigitalOcean, LLC
Autonomous System
AS14061 DigitalOcean, LLC
Hit Count
96
02

Detection Signatures

SignatureDescriptionPointsSeverity
Burst 21/10sAbnormally fast request rate — automated scanning+35
Burst 21/2sAbnormally fast request rate — automated scanning+35
Foreign refererReferer from unrelated external domain+10
UA changedMultiple User-Agents — bot rotation technique+25
Σ = 105
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

2026-09-16 10:30:44
First malicious request detected
IP entered monitoring from server access logs
During observation
Multiple detection signatures triggered
Burst 21/10s (+35), Burst 21/2s (+35), Foreign referer (+10)
2026-09-20 02:11:43
Last malicious request observed
Total score reached: 105/100
Next cycle
IP blocked — all subsequent requests denied (HTTP 403)
Added to blocklist automatically
05

Network Provider

DigitalOcean, LLC
AS14061 · 🇩🇪 Germany

We have detected 6988 malicious IPs from this autonomous system.

View all IPs from AS14061 →
06

Recommendations

Actions taken & recommended

  • IP 159.89.18.16 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 159.89.18.0/24
  • 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 159.89.18.16.

🤖 Bot Detection

Address UA spoofing from 159.89.18.16: maintain blocklist of known malicious UA strings, require consistent UA across sessions, implement TLS fingerprinting.

07

Neighbors in 159.89.18.0/24

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
b.barracudacentral.org
✓ Clean
psbl.surriel.com
✓ Clean
bl.blocklist.de
✓ Clean
cbl.abuseat.org
✓ Clean
zen.spamhaus.org
✓ Clean
spam.dnsbl.sorbs.net
✓ Clean
dnsbl.dronebl.org

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

10

Threat Analysis

159.89.18.16 has been assigned a threat score of 105/100 (Critical). This places it in the critical threat category. Immediate blocking is strongly advised across all network perimeters.

The following attack categories were identified:

Request FloodingUser-Agent Anomaly

📊 Threat Analysis

Our monitoring infrastructure has identified 159.89.18.16, geolocated to Frankfurt am Main, Germany, operating on the network of DigitalOcean, LLC, as a source of suspicious network activity. Over a period of 3 days, this IP generated 96 malicious requests, averaging approximately 32 requests per day. Operating from datacenter infrastructure, this IP is typical of addresses used in organized attack operations. Cloud and VPS providers are commonly exploited as launching platforms for automated scanning. Two attack patterns were identified (Request Flooding and User-Agent Anomaly), suggesting a semi-automated campaign that targets multiple vulnerabilities. Germany currently accounts for 3,644 blocked IPs in our database, making it a major source of malicious traffic. At 105/100, 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 Germany

64.89.163.182 (340)45.86.202.216 (340)15.220.152.241 (320)35.246.204.221 (320)159.100.30.125 (318)View all →

🏢 Same network: AS14061

129.212.237.216 (308)168.144.34.140 (295)170.64.203.182 (280)159.223.199.244 (280)168.144.130.251 (280)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.

💡 Cloud Infrastructure Abuse

Cloud platforms provide attackers with elastic, disposable infrastructure. Free tier accounts, stolen credit cards, and compromised cloud credentials enable rapid deployment of attack infrastructure that can scale to millions of requests and disappear within hours.

🔍 Check Any IP Address

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