Vulnerable Disclosures: ALERT: 43.255.0.0/16 Netblock Extremely Active and Noisy

Tuesday, April 21, 2015

ALERT: 43.255.0.0/16 Netblock Extremely Active and Noisy

We wanted to put out an alert that many of our sensors and clients are reporting inbound SMTP infected dyzera and ssh scanning. What's interesting is that the actors appears to not care how noisy they are. We highly recommend blocking the entire /16 netblock.

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Tuesday, April 21, 2015

ALERT: 43.255.0.0/16 Netblock Extremely Active and Noisy

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