IP Threat Report
121.128.121.144
ABUSE.MOM — BEHAVE OR GET EXPOSED
Geolocation & Classification
Detection Signatures
| Signature | Description | Points | Severity |
|---|---|---|---|
| Danger medium hits: 6 | Medium-risk: admin panels, config files | +60 | |
| 404 ratio >= 60% | Majority of requests returned 404 — enumeration | +25 | |
| Probe pattern 302->404 same path | Behavioral anomaly detected by automated analysis | +20 | |
| Foreign referer seen | Referer from unrelated external domain | +10 |
Observed Activity
Reconstructed HTTP requests from server access logs. Target domains redacted for security.
* Typical request patterns for detected signatures. Actual target domains are redacted.
Timeline
Network Provider
Recommendations
Actions taken & recommended
- IP 121.128.121.144 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 121.128.121.0/24
- Report abuse to the network provider via their abuse contact
- Ensure sensitive files (.env, .git, backups) are not accessible from the web
🔎 Directory Scan Defense
IP 121.128.121.144 is enumerating directories. Configure fail2ban apache-404 jail after 10+ 404 errors. Disable directory listings. Normalize all 404 responses.
Neighbors in 121.128.121.0/24
Other blocked IPs from the same /24 subnet — indicates systematic abuse from this network range.
Open Ports & Services
Network reconnaissance data from Shodan. Open ports may indicate running services, misconfigurations, or potential attack surfaces.
| Port | Service | Risk | Description |
|---|---|---|---|
| 22 | SSH | Low | Secure Shell — common brute force target for remote access |
| 3128 | Unknown | Low | Service on port 3128 |
| CVE ID | Link |
|---|---|
| CVE-2025-54574 | NVD → |
| CVE-2021-28652 | NVD → |
| CVE-2021-31808 | NVD → |
| CVE-2023-46846 | NVD → |
| CVE-2020-14058 | NVD → |
| CVE-2025-59362 | NVD → |
| CVE-2023-49285 | NVD → |
| CVE-2020-11945 | NVD → |
| CVE-2024-25617 | NVD → |
| CVE-2023-46728 | NVD → |
| CVE-2025-62168 | NVD → |
| CVE-2020-25097 | NVD → |
| CVE-2021-28662 | NVD → |
| CVE-2021-28651 | NVD → |
| CVE-2022-41318 | NVD → |
| CVE-2024-37894 | NVD → |
| CVE-2023-49286 | NVD → |
| CVE-2023-5824 | NVD → |
| CVE-2023-46724 | NVD → |
| CVE-2020-15810 | NVD → |
| CVE-2021-28116 | NVD → |
| CVE-2020-15049 | NVD → |
| CVE-2020-15811 | NVD → |
| CVE-2023-50269 | NVD → |
| CVE-2021-31807 | NVD → |
🔴 Security scanning identified 35 vulnerability entries on this host. This volume strongly suggests severely outdated software. Consult NVD advisories for details.
Data source: Shodan InternetDB. Scanned independently of abuse.mom.
Blacklist Status (DNSBL)
This IP was checked against major DNS-based blacklists used by mail servers and firewalls worldwide.
Checked: Spamhaus, SpamCop, Barracuda, SORBS, CBL, UCEProtect. Results may change over time.
Threat Analysis
121.128.121.144 has been assigned a threat score of 115/100 (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:
📊 Threat Analysis
IP address 121.128.121.144 has been traced to Ansan-si, South Korea, operating on the network of Korea Telecom. Our threat detection systems have flagged this address based on observed malicious behavior patterns. During its 1-day observation window, we recorded 1 hostile requests from this IP — roughly 1 per day on average. 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 IP exhibits directory enumeration behavior, systematically requesting non-existent paths to discover hidden files and misconfigured resources. Our records show 146 malicious IPs originating from South Korea, positioning it as a significant contributor to global threat activity. A score of 115/100 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.
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