The above tweet hints at UEFI support in Kaspersky TDSS Killer 126.96.36.199, but I’ve not found any more specific information.
PS: Kaspersky has a UEFI AntiVirus product, for OEMs:
Kaspersky Anti-Virus for UEFI (KUEFI) is the EFI BIOS level endpoint security solution providing effective protection from rootkits and bootkits and ensuring safe OS loading. The product’s key feature is that it starts running in the EFI environment even before the OS bootup process begins, thus preventing any resident malware from loading. By working on EFI level, KUEFI ensures reliable protection from rootkits, bootkits and other malware speciﬁcally designed to circumvent desktop anti-malware technologies. KUEFI is provided as a small EFI module which nevertheless contains the award-winning Kaspersky Anti-Virus engine. The KUEFI architecture enables its integration into any motherboard ﬁrmware supporting the EFI standard, regardless of the vendor.