Virus:Worm/IRCBot.10790
Date discovered:09/05/2005
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:10.790 Bytes
MD5 checksum:e3614ba296c9b4a5cd4537c90f072865
VDF version:6.31.01.212

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: Backdoor.Win32.IRCBot.fx
   •  Kaspersky: BKDR_IRCBOT.BZ
   •  TrendMicro: W32/Sdbot.LXR
   •  Grisoft: Trojan.DR.IRCBot.DZ1
   •  Eset: Backdoor.IRCBot.FX


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops a file
   • Registry modification
   • Third party control

 Files It copies itself to the following location:
   • %WINDIR%\csrss.exe

– %WINDIR%\kmc.dll Further investigation pointed out that this file is malware, too. Detected as: Worm/IRCBot.8402

 Registry The following registry keys are added:

– [HKCR\CLSID\%generated CLSID%\InProcServer32]
   • @="kmc.dll"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
   ShellServiceObjectDelayLoad]
   • "System"="%generated CLSID%

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: irc.foofle.net
Port: 6667
Channel: #sbots_main
Nickname: %computer name%



– This malware has the ability to collect and send information such as:
    • Malware uptime
    • Information about the network
    • Information about the Windows operating system
    • Download file
    • Join IRC channel
    • Kill process
    • Open remote shell
    • Perform network scan
    • Restart system
    • Terminate malware
    • Terminate process
    • Updates itself
    • Upload file
    • Visit a website

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Razvan Olteanu on Tuesday, November 15, 2005
Description updated by Andrei Ivanes on Wednesday, November 23, 2005

Back . . . .