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