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Virus:Worm/SdBot.alq
Date discovered:23/01/2006
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:198.077 Bytes
MD5 checksum:2333c0dd75f7f249b803430Aec69b2fa
VDF version:6.33.00.147

 General Method of propagation:
   • Local network


Aliases:
   •  Symantec: W32.Spybot.Worm
   •  Kaspersky: Backdoor.Win32.SdBot.alq
   •  TrendMicro: WORM_SDBOT.DFV
   •  F-Secure: Backdoor.Win32.SdBot.alq
   •  Sophos: W32/Sdbot-AOS
   •  Panda: W32/Sdbot.GHH.worm
   •  VirusBuster: Worm.SdBot.BSY
   •  Bitdefender: Backdoor.IRCBot.EU


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


Side effects:
   • Lowers security settings
   • Registry modification
   • Makes use of software vulnerability
   • Third party control

 Files It copies itself to the following location:
   • %WINDIR%\win32ssr.exe




It tries to download a file:

The location is the following:
   • http://http.down.love.witlog.com/**********
At the time of writing this file was not online for further investigation.

 Registry The following registry keys are added in order to load the service after reboot:

HKLM\SYSTEM\CurrentControlSet\Services\Win32Sr
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%WINDIR%\win32ssr.exe"
   • "DisplayName"="Win32Sr"
   • "ObjectName"="LocalSystem"
   • "FailureActions"=%hex values%
   • "Description"="Platform SDK Enviroment"



The following registry keys are added:

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
   • "DoNotAllowXPSP2"=dword:00000001

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
   • "Installed Time"="%current date%"
   • "Record"=%double-byte-characters%



The following registry keys are changed:

HKLM\SYSTEM\CurrentControlSet\Control
   Old value:
   • "WaitToKillServiceTimeout"=%user defined settings%
   New value:
   • "WaitToKillServiceTimeout"="7000"

HKLM\SOFTWARE\Microsoft\Security Center
   Old value:
   • "UpdatesDisableNotify"=%user defined settings%
   • "AntiVirusDisableNotify"=%user defined settings%
   • "FirewallDisableNotify"=%user defined settings%
   • "AntiVirusOverride"=%user defined settings%
   • "FirewallOverride"=%user defined settings%
   New value:
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001

Deactivate Windows Firewall:
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
   Old value:
   • "EnableFirewall"=%user defined settings%
   New value:
   • "EnableFirewall"=dword:00000000

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update
   Old value:
   • "AUOptions"=%user defined settings%
   New value:
   • "AUOptions"=dword:00000001

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   Old value:
   • "restrictanonymous"=%user defined settings%
   New value:
   • "restrictanonymous"=dword:00000001

HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
   Old value:
   • "AutoShareWks"=%user defined settings%
   • "AutoShareServer"=%user defined settings%
   New value:
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

HKLM\SOFTWARE\Microsoft\Ole
   Old value:
   • "EnableDCOM"=%user defined settings%
   New value:
   • "EnableDCOM"="N"

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It drops copies of itself to the following network shares:
   • IPC$
   • d$\windows\system32
   • C$\windows\system32
   • c$\winnt\system32
   • ADMIN$\system32\
   • ADMIN$


It uses the following login information in order to gain access to the remote machine:

Cached usernames and passwords.

A list of usernames and passwords:
   • admin; root; server; asdfgh; asdf; !@; $%^&; !@; $%^; !@; $%; !@; $;
      654321; 123456; 12345; 1234; 123; 111; administrator



Exploit:
It makes use of the following Exploits:
– MS02-061 (Elevation of Privilege in SQL Server Web)
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-039 (Buffer Overrun in RPCSS Service)
– MS03-049 (Buffer Overrun in the Workstation Service)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)


IP address generation:
It creates random IP addresses while it keeps the first two octets from its own address. Afterwards it tries to establish a connection with the created addresses.


Infection process:
Creates an FTP script on the compromised machine in order to download the malware to the remote location.


Remote execution:
It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

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

Server: irc.love.wit**********
Port: 9768
Server password: y3-buy-witl0g
Channel: #w1tRv6
Nickname: [P00|USA|%five-digit random character string%]
Password: r3pw1tl0l



 This malware has the ability to collect and send information such as:
    • CPU speed
    • Current user
     Details about drivers
    • Free disk space
    • Free memory
    • Information about the network
    • Information about running processes
    • Size of memory
    • Username
    • Information about the Windows operating system


 Furthermore it has the ability to perform actions such as:
     Launch DDoS ICMP flood
     Launch DDoS SYN flood
     Launch DDoS UDP flood
    • Disable network shares
    • Download file
    • Enable network shares
    • Execute file
    • Kill process
    • Perform DDoS attack
     Perform network scan
    • Perform port redirection
     Start spreading routine
    • Terminate malware
    • Terminate process
     Updates itself
    • Upload file
     Visit a website

 Process termination  List of services that are disabled:
   • Security Center
   • Telnet
   • Remote Registry
   • Messenger

 Backdoor Contact server:
All of the following:
   • http://221.10.201.70/cgi-bin/**********
   • http://cgi.break.power.ne.jp/check/**********
   • http://www.100money.com/cgi-bin/**********
   • http://nippon.eco.to/**********
   • http://www.souworld.com/cgi-bin/**********
   • http://www.adforshop.com/**********
   • http://rain.prohosting.com/cleine1/cgi-bin/**********
   • http://mikcon7.hostingrapid.com/**********
   • http://www.worldandsearch.com/cgi-bin/**********
   • http://www.kinchan.net/cgi-bin/**********


 File details Programming language:
The malware program was written in MS Visual C++.


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

Descrição enviada por Irina Boldea em segunda-feira, 17 de abril de 2006
Descrição atualizada por Irina Boldea em segunda-feira, 17 de abril de 2006

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