ftp://ftp.f-secure.com/anti-virus/tools/f-bot.exe
Disinfection instructions can be found here:
http://www.f-secure.com/tools/f-bot.txt
ftp://ftp.f-secure.com/anti-virus/tools/f-bot.txt
If the infection is in a local network, please follow the
instructions on this webpage:
http://www.f-secure.com/v-descs/netdisinf.shtml
The backdoor's file is a PE executable file about 8 kilobytes
long, packed with MEW file compressor and patched with PE_Patch.
When the backdoor's file is activated on a computer, it copies
its file to Windows System folder as MOUSEBM.EXE and then starts
the copied file as a service named 'Mouse Button Monitor',
described as follows:
Enables a computer to maintain synchronization with a PS/2 pointing device.
Stopping or disabling this service will result in system instability.
If the backdoor fails to start its service, it tries to inject
its code into Explorer.exe process. When active, the backdoor
connects to one of the following servers on port 18067:
esxt.is-a-fag.net
esxt.legi0n.net
Then backdoor joins an IRC channel called '#p2' using the
hardcoded password and creates a bot there. A remote hacker can
control a backdoor via a bot that it creates in the '#p2'
channel. A hacker can do any of the following:
* scan for vulnerable computers and spread to them using PnP exploit
* download and run files on an infected computer
* find files on local hard disks
* perform DDoS (Distributed Denial of Service) attack
* perform SYN and UDP flood
The backdoor has the ability to spread to remote computers using
the PnP exploit on port 445. Please see the following page for detailed
information on the vulnerability:
http://www.microsoft.com/technet/security/Bulletin/MS05-039.mspx
Detection for this malware was published on August 15th, 2005 in
the following F-Secure Anti-Virus updates:
[FSAV_Database_Version]
Version=2005-08-15_05
Technical Details:
Alexey Podrezov, August 15th, 2005;
F-Secure Corporation
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