VoidStealer uses debugger trick to steal Chrome master key
🔓 VoidStealer, an information stealer offered as MaaS since mid‑December 2025, uses a debugger-based technique to extract Chrome's v20_master_key directly from memory. The malware starts a suspended, hidden browser process, attaches as a debugger, and waits for the target chrome.dll to load before setting hardware breakpoints on an instruction that references the key. When the breakpoint triggers during startup decryption, VoidStealer reads the register pointer and uses ReadProcessMemory to capture the plaintext key without privilege escalation. Gen Digital reports this is the first infostealer observed in the wild using this approach.
