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MATCHBOIL Malware Uses Cloudflare-Hidden C2 Servers to Deliver Backdoor Payloads

Cybersecurity NewsOctober 9, 20264 min read

MATCHBOIL, a C# malware downloader linked to UAC-0099, uses command-and-control (C2) servers hidden behind Cloudflare to deliver backdoor payloads. Its changing code shows how the group has moved from a simple downloader toward repeated server contact, stronger code hiding, and checks designed to stop security researchers from studying infections. The observed victims were all in […] The post MATCHBOIL Malware Uses Cloudflare-Hidden C2 Servers to Deliver Backdoor Payloads appeared first on Cyber Security News.

MATCHBOIL, a C# malware downloader linked to UAC-0099, uses command-and-control (C2) servers hidden behind Cloudflare to deliver backdoor payloads. Its changing code shows how the group has moved from a simple downloader toward repeated server contact, stronger code hiding, and checks designed to stop security researchers from studying infections. The observed victims were all in Ukraine. ESET recorded infections at transportation companies during July and August 2025, a manufacturing company in December…

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