#OpFauxSign
Microsoft disrupted Fox Tempest's OpFauxSign malware-signing service, which used Artifact Signing to make malicious code look trusted and aid ransomware campaigns targeting healthcare, education, government, and finance. #FoxTempest #OpFauxSign
Microsoft Takes Down Malware-Signing Service Behind Ransomware Attacks
Microsoft disrupted Fox Tempest’s malware-signing-as-a-service operation, OpFauxSign, which abused Artifact Signing to distribute trusted-looking malicious code and support ransomware activity worldwide. The scheme enabled signed malware and loaders such as Rhysida, Oyster, Lumma Stealer, and Vidar to evade defenses and target healthcare, education, government, and financial organizations. #FoxTempest #OpFauxSign #ArtifactSigning #Rhysida...
www.hendryadrian.com
May 20, 2026 at 11:45 PM
Today Microsoft announces OpFauxSign, an action against of "Fox Tempest" aka "SamCodeSign" infrastructure and "Vanilla Tempest", allegedly "members of an organized cybercriminal enterprise that has fraudule…

🔁 RT @g0njxa | reposted by @SquiblydooBlog
https://x.com/g0njxa/status/2056774426243305672
Disrupting Fox Tempest: A cybercrime service that turned “verified” software into a pathway for...
t.co
May 20, 2026 at 12:37 AM