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Same Softonic Cert Signs a RustDesk Impostor and a Near-Clean Twin

A Win32 installer bearing Softonic International SA's code-signing certificate exists in two forms: one flagged by 31 of 76 antivirus engines under aliases impersonating RustDesk and Lenovo Vantage, the other nearly invisible at 4 of 76. Both share the identical certificate serial and compile timestamp, pointing to a single build pipeline rather than two unrelated actors.

Aug 9, 2026, 20:14 (UTC+9)Last seenAug 9, 2026Severity62ByCTX TeamActorSalty SpiderKuKuIOC5MITRE21RegionsARBOBRCLCO

A Win32 installer signed with the identical Softonic International SA code-signing certificate turns up in two forms with wildly different fortunes: one build draws 31 of 76 antivirus detections and ships under aliases that impersonate RustDesk and Lenovo Vantage, while its cert-mate scores a near-clean 4 of 76 and drew almost no submissions at all.

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Source: CTX Threat Intelligence