GhostRedirector poisons Windows servers: Backdoors with a side of Potatoes

GhostRedirector poisons Windows servers: Backdoors with a side of Potatoes

ESET researchers have identified a new threat actor, whom we have named GhostRedirector, that compromised at least 65 Windows servers mainly in Brazil, Thailand, and Vietnam. GhostRedirector used two previously undocumented, custom tools: a passive C++ backdoor that we named Rungan, and a malicious Internet Information Services (IIS) module that we named Gamshen. While Rungan…

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Power Tips #137: Implementing LLC current-mode control on the secondary side with a digital controller

Power Tips #137: Implementing LLC current-mode control on the secondary side with a digital controller

Current-mode control LLC considerations Inductor-inductor-capacitor (LLC) serial resonant circuits, as shown in Figure 1, can achieve both zero voltage switching on the primary side and zero current switching on the secondary side in order to improve efficiency and enable a higher switching frequency. In general, an LLC converter uses direct frequency control, which has only…

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