Summary
SmarterTools reports a network breach after the Warlock ransomware group exploited an unpatched SmarterMail virtual machine to bypass authentication and move laterally via Active Directory. Security software blocked the final encryption attempt, but the attackers compromised 12 Windows servers and a secondary data center.
Take Action:
When developing a product, always make sure to patch your own product instances. Because you are just as exposed, and you don't have a lot of reasonable arguments not to patch.
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This article was originally published on BeyondMachines
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