TrymeLocker WH_KEYBOARD_LL Hook with Network and File Write Correlation

Ibrahim Saud@tektrix

•updated Jun 28, 2026•0•0•5

Detects processes that install a low-level keyboard hook (WH_KEYBOARD_LL) and are simultaneously involved in suspicious activity, such as network connections to non-private IP addresses and file writes to typical temporary directories (e.g., C:\Windows\Temp, C:\Users\Public). This behavior is characteristic of keylogging activity and subsequent data exfiltration or staging.