detection period: 2021-02-15 00:00-23:59 UTC
total number of suspected botnet IPs: 41600
number of botnet IPs notified to network operators (best case, if all mail were sent out successfully): 38487
number of spam blocked: 0
recipient count of spam blocked: 0
The top 10 networks (as found in WHOIS), ordered by the number of suspected botnet IPs are:
| Rank | Network | # of suspected botnet IPs |
|---|---|---|
| 1 | TencentCloud | 2042 |
| 2 | KORNET | 840 |
| 3 | TENCENT-CN | 829 |
| 4 | HINET-NET | 793 |
| 5 | DIGITALOCEAN-192-241-128-0 | 648 |
| 6 | NETVIGATOR | 624 |
| 7 | ALISOFT | 617 |
| 8 | NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK | 609 |
| 9 | VE-CSVE-LACNIC | 447 |
| 10 | Baidu | 418 |
The top 10 countries (as defined by the 2-character country code), ordered by the number of suspected botnet IPs are:
| Rank | Country/Region | # of suspected botnet IPs |
|---|---|---|
| 1 | China | 8974 |
| 2 | United States | 5061 |
| 3 | India | 2584 |
| 4 | Russian Federation | 2366 |
| 5 | Brazil | 1957 |
| 6 | Hong Kong | 1441 |
| 7 | South Korea | 1269 |
| 8 | Indonesia | 1166 |
| 9 | Taiwan | 1154 |
| 10 | Viet Nam | 919 |
The top 10 TCP ports, ordered by the number of connection attempts received are:
| Rank | TCP port number | # of connection attempts received |
|---|---|---|
| 1 | 445 | 289224 |
| 2 | 22 | 91932 |
| 3 | 1222 | 56649 |
| 4 | 23 | 47092 |
| 5 | 220 | 44651 |
| 6 | 1433 | 28724 |
| 7 | 1000 | 25838 |
| 8 | 321 | 25324 |
| 9 | 828 | 24962 |
| 10 | 222 | 24499 |
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