Ensure your banking host strictly validates the Unpredictable Number and ATC for every incoming transaction. This prevents attackers from reusing a previously generated ARQC.
The tool needs the specific session key for the transaction. arqc-gen.exe
Security administrators should monitor if the executable attempts to connect to unknown external IP addresses, command-and-control (C2) servers, or dark web routing nodes. Defensive Recommendations for Businesses command-and-control (C2) servers