C Keylogger -

| Legitimate (with consent) | Malicious (illegal) | |---------------------------|----------------------| | Parental monitoring of child’s device | Stealing passwords, credit cards | | Employee monitoring (with signed policy) | Corporate espionage | | User debugging their own input issues | Stalking or blackmail | | Academic research in malware analysis | Botnet keylogging |

The Windows operating system manages input via a messaging system. When a user presses a key, the hardware driver generates an interrupt, which Windows translates into a message (such as WM_KEYDOWN ) and sends to the message queue of the active window. c keylogger

From a blue team perspective, detecting C-based keyloggers involves: | Legitimate (with consent) | Malicious (illegal) |