German Agencies Warn of Signal Phishing Targeting Politicians, Military, Journalists

German security agencies (BfV and BSI) warned of a likely state-sponsored campaign using phishing over Signal—posing as "Signal Support" or a "Signal Security ChatBot"—to trick high-value targets into revealing registration PINs or scanning device-linking QR codes, enabling attackers to take over or eavesdrop on accounts (and potentially extend the technique to WhatsApp); the advisory describes attack chains, related nation-state activity, and mitigation steps such as enabling Registration Lock and reviewing linked devices.