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IOC Radar

Indicators are what attackers leave behind. Stolen credentials are what they arrive with.

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8 IOCs

Exposing Fox Tempest: A malware-signing service operation

Microsoft Threat Intelligence
Microsoft Threat Intelligence
Published May 19, 2026Original Report

Threat Actors

Malware Families

Excerpt

In this article Fox Tempest’s role and impact Fox Tempest’s malware signing as a service infrastructure Defending against Fox Tempest-enabled attacks Microsoft Defender detections Indicators of compromise Fox Tempest is a financially motivated threat actor that operates a malware-signing-as-a-service (MSaaS)  used by other cybercriminals to more effectively distribute malicious code, including ransomware. The threat actor abuses Microsoft Artifact Signing to generate…

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Diamond Model

SOCIAL AXISTECHNOLOGY AXISADVERSARYAkiraMuddyWaterINFRASTRUCTUREsignspace.cloudCAPABILITYAkiraLummaRhysidaVICTIMunknown
Adversary(2)
Infrastructure(1)
Capability(4)
Victim

Indicators of Compromise

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8 indicators

TypeIndicatorConfidenceScoreFirst Seen
SHA1dc0acb01e3086ea8a9cb144a5f97810d291020ceMediumScore 53/100First seen
MD572f988bf86f141af91ab2d7cd011db47MediumScore 53/100First seen
SHA25611af4566539ad3224e968194c7a9ad7b596460d8f6e423fc62d1ea5fc0724326MediumScore 53/100First seen
Domainsignspace.cloudHighScore 64/100First seen
SHA256f0a6b89ec7eee83274cd484cea526b970a3ef28038799b0a5774bb33c5793b55MediumScore 53/100First seen
MD5870aef541453461c0a7208deb5fe4ca0MediumScore 53/100First seen
SHA17e6d9dac619c04ae1b3c8c0906123e752ed66d63MediumScore 53/100First seen
SHA256f0668ce925f36ff7f3359b0ea47e3fa243af13cd6ad9661dfccc9ff79fb4f1ccMediumScore 53/100First seen

IOC Relationship Graph

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