🪼What is Malicious API's Functions

Malicious Windows API functions are system calls or interfaces within the Windows operating system that malware uses to perform harmful actions .

Why Malicious API's Functions ?

Malicious API functions are used by malware to execute harmful actions while evading detection and bypassing security mechanisms. Here’s why they are critical in the context of malware:

1. Code Injection: Functions like CreateRemoteThread and WriteProcessMemory allow malware to inject and execute code within the address space of other processes, facilitating stealthy operations.

2. Data Theft: APIs such as ReadProcessMemory enable malware to access and extract sensitive data from other processes, potentially leading to data breaches.

3. Persistence: Functions like RegSetValueEx are used to modify the Windows Registry, allowing malware to establish persistence by ensuring it starts automatically on system boot.

4. System Manipulation: Malicious use of APIs like CreateFile and WriteFile allows malware to create, modify, or delete files, often to store malicious payloads or disrupt system functionality.

5. Privilege Escalation: APIs such as NtQuerySystemInformation provide detailed system information that can help malware identify and exploit vulnerabilities to escalate privileges.

6. Avoid Detection: By using APIs to hide their presence or manipulate system behavior, malware can avoid detection by traditional security measures.

7. Network Communication: Functions like InternetOpen and InternetOpenUrl facilitate communication with command-and-control servers, allowing malware to exfiltrate data or receive instructions.

8. User Interception: APIs such as SetWindowsHookEx enable malware to intercept user input or system events, which can be used to capture keystrokes or manipulate user actions.