Backdoor.IRC.Snyd.A( Backdoor.Win32.Breplibot.b (Kaspersky) Troj/Stinx-E (Sophos) W32/Brepibot virus (McAfee) )
SYMPTOMS: It is virtually impossible for a normal user to detect presence of any files hidden by Sony DRM Software. See technical description below.Prior to 10 Nov 2005 this malware was detected as BehavesLike:Win32.IRC-Backdoor proactively TECHNICAL DESCRIPTION: This is an IRC backdoor that was spammed in an e-mail withe the following body: Hello, Your photograph was forwarded to us as part of an article we are publishing for our December edition of Total Business Monthly. Can you check over the format and get back to us with your approval or any changes? If the picture is not to your liking then please send a preferred one. We have attached the photo with the article here. Kind regards, Jamie Andrews Editor www.TotalBusiness.co.uk ********************************************** The Professional Development Institute And the attachment: Article+Photos.exe The backdoor uses the Sony DRM copy protection system in order to hide its presence in the system. When executed it does the following actions: - It copies itself as: %sysdir%\ $sys$drv.exe - It should add the following registry keys: HKCU\Software\Microsoft\Windows\CurrentVersion\Run\$sys$drv with value %sysdir%\$sys$drv.exe HKLM\Software\Microsoft\Windows\CurrentVersion\Run\$sys$drv with value %sysdir%\$sys$drv.exe
%TEMP%\xxx.bat and %TEMP%\yyy.bat where xxx and yyy are two random numbers. xxx.bat tryes to disable firewall checking for the $sys$drv.exe yyy.bat waits for the trojan to end and deletes it. - It connects to one of 5 hardcoded IRC servers on port 8080. - It waits for a small list of posible commands on channel #sony The backdoor contains the following string: „SonyEnabled” Removal instructions: Please let BitDefender disinfect your files.ANALYZED BY: Sorin Dudea, virus researcher |
