RingZero

Classification

Malware

-

-

RingZero, Ring0, Trojan.PSW.Ring

Summary

RingZero is a trojan. It can arrive as an executable email attachment. This trojan first arrived attached to a Winsock Version Checker program. The pure trojan has 2 parts - an executable part (an EXE file packed with Petite file compressor) and a small VXD part attached to executable. The trojan can be also attached to any Windows executable.

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.

Find out more
Knowledge Base

Find the latest advice in our Community Knowledge Base.

Product Manual

See the manual for your F-Secure product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

When the trojan is run it first installs itself to system. It detaches itself from a file it came with and writes 2 files to \Windows\System\ directory. One file is always RING0.VXD and the other can have different names:

TELNET23.EXE
EXPLUPD.EXE
PCT.EXE
ITS.EXE

Also the third file called A.EXE could be created. Then the trojan makes necessary modifications so it could be always run with Windows. Being active the trojan scans Internet for proxy servers and if such server is found the the trojan writes its address to ITS.DAT (or to differently named DAT file) and sends this file to a website with the following address: www.rusftpsearch.net (now it is removed for security reasons).

It seems that the trojan was purposely created to send data to that server. The idea was most likely to collect information about all proxy servers on Internet and compile it into a database.

The trojan doesn't have any other payload and it doesn't work on Windows NT.

Date Created: -

Date Last Modified: -