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Virus:BDS/Ruskill.em
Date discovered:14/06/2011
Type:Backdoor Server
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
File size:129.640 Bytes
MD5 checksum:7E2EC1FB68DE134C42F94771E90B5B2F
VDF version:7.11.09.168 - Tuesday, June 14, 2011
IVDF version:7.11.09.168 - Tuesday, June 14, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Backdoor.Win32.Ruskill.em
   •  Bitdefender: Backdoor.IRCBot.ADEI
     Microsoft: Worm:Win32/Dorkbot.A


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
    Windows Vista
    Windows 7


Side effects:
   • Drops files
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %APPDATA%\%random character string%.exe



It deletes the initially executed copy of itself.

 Registry One of the following values is added in order to run the process after reboot:

  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "%random character string%"="%APPDATA%\%random character string%.exe"



The following registry key is changed:

Lower security settings from Internet Explorer:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:00000001
   • "ProxyEnable"=dword:00000000
   • "ProxyServer"=-
   • "ProxyOverride"=-
   • "AutoConfigURL"=-

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

Server: **********-servfail.opendns.com
Port: 1863
Server password: ngrBot
Channel: #80t35ref
Nickname: {%random caracters%}%random caracters%
Password: 1963.g3rb3rs1t0.3691

Server: **********smynew.info
Port: 1863
Server password: ngrBot
Channel: #80t35ref
Nickname: {%random caracters%}%random caracters%
Password: 1963.g3rb3rs1t0.3691

Server: **********smynew1.info
Port: 1863
Server password: ngrBot
Channel: #80t35ref
Nickname: {%random caracters%}%random caracters%
Password: 1963.g3rb3rs1t0.3691

Server: **********smynew2.info
Port: 1863
Server password: ngrBot
Channel: #80t35ref
Nickname: {%random caracters%}%random caracters%
Password: 1963.g3rb3rs1t0.3691



 This malware has the ability to collect and send information such as:
    • Current user
    • Information about the Windows operating system


 Furthermore it has the ability to perform actions such as:
     connect to IRC server
     disconnect from IRC server
    • Join IRC channel
    • Leave IRC channel

 Injection  It injects itself as a remote thread into processes.

    All of the following processes:
   • explorer.exe
   • csrss.exe
   • services.exe
   • smss.exe
   • svchost.exe
   • svchost.exe
   • svchost.exe
   • svchost.exe
   • svchost.exe
   • winlogon.exe


 Miscellaneous Accesses internet resources:
   • http://api.wipmania.com/

설명 삽입자 Andrei Ilie   2011년 8월 9일 화요일
설명 업데이트 Andrei Ilie   2011년 8월 9일 화요일

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