On 2023-05-15 01:16, Taavi Eomäe via mailop wrote:
Can confirm seeing a similar botnet at action, ~5000 different IP-addresses, ~400 million attempts and counting.

Seems to be trying relatively random and unrelated local part + domain combinations. This also means this botnet is rather trivial to detect.
This does seem to be related to a new round of CPE and GPON compromises, and yes the weekend numbers were much higher than normal.

But overall it was a high volume spam weekend. *Cough* SendGrid/MailGun
Lot's of DediPath and OVH spam as well.

But some ISP's have to go clean their networks, for their customers sake..

Dynamic Regex Databases, and DUL RBL's took care of them but..
Authentication attacks on Port 25 mostly... (You do have that turned off I hope), big password spray attacks..

111.70.0.124        (RS)          1   111-70-0-124.emome-ip.hinet.net
111.70.1.170        (RS)          3   111-70-1-170.emome-ip.hinet.net
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111.70.2.65         (RS)          1   111-70-2-65.emome-ip.hinet.net
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   111.70.2.127     (RS)          1   111-70-2-127.emome-ip.hinet.net
111.70.4.4          (RS)          2   111-70-4-4.emome-ip.hinet.net
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111.70.5.125        (RS)          3   111-70-5-125.emome-ip.hinet.net
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111.70.6.28         (RS)          1   111-70-6-28.emome-ip.hinet.net
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111.70.7.41         (RS)          1   111-70-7-41.emome-ip.hinet.net
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111.70.9.24         (RS)          1   111-70-9-24.emome-ip.hinet.net
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111.70.12.107       (RS)          5   111-70-12-107.emome-ip.hinet.net
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111.70.13.23        (RS)          8   111-70-13-23.emome-ip.hinet.net
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111.70.14.20        (RS)          2   111-70-14-20.emome-ip.hinet.net
111.70.15.76        (RS)          1   111-70-15-76.emome-ip.hinet.net
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111.70.16.7         (RS)          3   111-70-16-7.emome-ip.hinet.net
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111.70.17.167       (RS)          3   111-70-17-167.emome-ip.hinet.net
111.70.18.42        (RS)          3   111-70-18-42.emome-ip.hinet.net
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111.70.20.11        (RS)          3   111-70-20-11.emome-ip.hinet.net
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111.70.21.178       (RS)          1   111-70-21-178.emome-ip.hinet.net
111.70.25.237       (RS)          4   111-70-25-237.emome-ip.hinet.net
111.70.26.51        (RS)          2   111-70-26-51.emome-ip.hinet.net
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111.70.27.106       (RS)          1   111-70-27-106.emome-ip.hinet.net
   111.70.27.109    (RS)          3   111-70-27-109.emome-ip.hinet.net
   111.70.27.226    (RS)          1   111-70-27-226.emome-ip.hinet.net
111.70.28.22        (RS)          3   111-70-28-22.emome-ip.hinet.net
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111.70.29.190       (RS)          2   111-70-29-190.emome-ip.hinet.net
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111.70.36.127       (RS)          1   111-70-36-127.emome-ip.hinet.net
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