Rootkit:W32/Zxshell.B

Classification

Category :

Malware

Type :

Rootkit

Aliases :

Rootkit:W32/Zxshell.B

Summary

Rootkit:W32/Zxshell.B is dropped by Backdoor:W32/Zxshell.A and basically functions as a protection mechanism for its main payload file.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

Rootkit:W32/Zxshell.B tries to protect the main payload DLL file by:

  • Hiding files which contains underscore "_" by installing hooks to the file system driver
  • Attempting to hide the tcp port 443
  • Detect if the following security product exist:
  • NOD32
  • AVP
  • 360Safe
  • AVG
  • Avast
  • AhnSD
  • McShield
  • IceSword

The driver can easily crash the system when it fails in its attempt to hook the kernel drivers, for example the ntfs.sys and tcpip.sys.

Protect your devices from malware with F‑Secure Total

Protecting your devices from malicious software is essential for maintaining online security. F‑Secure Total makes this easy, helping you to secure your devices in a brilliantly simple way.

  • Award-winning antivirus and malware protection
  • Online browsing, banking, and shopping protection
  • 24/7 online identity and data breach monitoring
  • Unlimited VPN service to safe­guard your privacy
  • Password manager with private data protection
More Support

Community

Ask questions in our Community .

User Guides

Check the user guide for instructions.

Contact Support

Chat with or call an expert.

Submit a Sample

Submit a file or URL for analysis.