NCSC Issues Security Alert Over Hackers Targeting WhatsApp and Signal Accounts

The UK NCSC warns of a rise in targeted attacks against high‑risk individuals using messaging apps (WhatsApp, Facebook Messenger, Signal), attributing activity to Russia‑based actors and noting prior similar campaigns by APT31 and IRGC‑linked actors. Attack techniques include malicious links and QR codes, credential and account takeover, stealthy group joins and impersonation; the advisory recommends MFA, not sharing verification codes, using corporate messaging for work, and routinely checking linked devices and group members.