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Subnet 103.210.21.0/24
SUBNET Ended highWhy this campaign was detected
3 IPs from the same /24 subnet (103.210.21.0/24) were observed attacking our sensors within the same time window. All belong to UCLOUD INFORMATION TECHNOLOGY HK LIMITED (AS135377). Concentrated activity from adjacent IPs is a strong indicator of a single operator or coordinated botnet.
Primary ASN
AS135377 · UCLOUD INFORMATION TECHNOLOGY HK LIMITED
Subnet
103.210.21.0/24
Country
🇸🇬 SG
Cloud Provider
—
Member Count
3 IPs
Below average
Total Events
1215
Below average by volume
Started / Ended
2026-02-28 19:01 — 2026-09-08 03:00
Attack Types
MITRE ATT&CK Techniques
Reconnaissance
Initial Access
Command and Control
Member Actors
| IP Address | Behavior | Confidence | Flags | Events | Agents | Attack Types | Hostname | Last Seen | |
|---|---|---|---|---|---|---|---|---|---|
| 103.210.21.178 | credential_harvester | 71% | 1x OSINT | 2123 | 3 | ssh:bruteforce | — | 2026-08-02 02:06 | evidence → |
| 103.210.21.225 | credential_harvester | 65% | 494 | 3 | ssh:bruteforce | — | 2026-05-20 14:29 | evidence → | |
| 103.210.21.97 | opportunistic_bruter | 36% | 23 | 1 | ssh:bruteforce | — | 2026-04-27 18:55 | evidence → |
VPN Known VPN or proxy provider
DROP ASN on Spamhaus DROP list
Nx OSINT Corroborated by N external threat feeds