Overview
This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.
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Minimum DAT
4678 (2006-01-19) Updated DAT4678 (2006-01-19) |
Minimum Engine
5.1.00 File Length3,38,933 bytes |
Description Added
2006-01-19 Description Modified2006-03-01 |
Malware Proliferation
Characteristics
Upon execution it drops a batch file by name AUTOEXEC.BAT into %Sysdir% that tries to disable the internet connection firewall.
This bat file is detected as Backdoor-CGW.bat
It also copies itself as services.exe into windows system folder.
(Where %Sysdir% is the Windows System directory, for example C:\WINDOWS\SYSTEM32)
Registry:
It adds the following registry key for loading at startup.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Run = "services.exe"
Miscellaneous information:
Outbound connections to before.9966.org and bfzz.usidc.cn were made. The program sends username and password to these sites to get mx record and email-id information for 163.com domain.
Another copy of csvss.exe was downloaded from before.9966.org.
Symptoms
- Existence of the files/Registry keys detailed above.
Method of Infection
Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, email, etc.
Removal
A combination of the latest DATs and the Engine will be able to detect and remove this threat. AVERT recommends users not to trust seemingly familiar or safe file icons, particularly when received via P2P clients, IRC, email or other media where users can share files.
Variants