Trojan-Downloader:W32/Agent.HSM

Classification

Malware

Trojan-Downloader

W32

Trojan-Downloader:W32/Agent.HSM

Summary

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Removal

Automatic action

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.

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

This trojan may be downloaded from a malicious website. It may also arrive as an email attachment.Known email subjects associated with this malware are:

  • Really cool photos
  • Exclusive photos, you'll be happy
  • Spam: Great photos for you
  • Great photos for you
  • The best photos for you

Installation

During installation, the trojan will drop a copy of itself to:

  • %systemroot%\system32\rs32net.exe

It also sets a launch point with the following registry key:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run rs32net = %systemroot%\system32\rs32net.exe

It will then try to launch svchost.exe, and injects its code by replacing the launched svchost.exe code.

Execution

Upon execution, this malware will attempt to connect to the following websites:

  • http://astana1988.[...]hostia.com
  • http://astana.[...]fire.net

It then attempts to download additional files from the following IP addresses:

  • 91.203.92.7
  • 208.66.195.16
  • 208.66.195.71
  • 208.66.195.232
  • 208.66.195.240
  • 216.195.55.50
  • 216.195.56.22
  • 209.66.122.238

As of this writing, these IP addresses are down and are not available.

Date Created: -

Date Last Modified: -