Microsoft sues to disrupt Fox Tempest malware-signing service, seizes signspace.cloud

PUBT
2026.05.19 16:42
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Microsoft has filed a lawsuit against Fox Tempest, a malware-signing service, in the US District Court for the Southern District of New York. The lawsuit aims to disrupt operations that misuse Microsoft code-signing tools, which have been linked to ransomware attacks on critical organizations. Microsoft has seized the signspace.cloud website and taken offline numerous virtual machines. The complaint also implicates Vanilla Tempest as a co-conspirator in these activities.