Worm/Sdbot.19212 - Worm

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Summary

Full description

Statistics

Virus:	Worm/Sdbot.19212
Date discovered:	02/11/2006
Type:	Worm
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Medium to high
Damage Potential:	Medium
Static file:	Yes
File size:	19.212 Bytes
MD5 checksum:	d810a7a72bb1b9ea13a691ae8f85353f
VDF version:	6.36.00.117
IVDF version:	6.36.00.134 - Thu, 19 Oct 2006 13:10 (GMT+1)

General Methods of propagation:
   • Local network
   • Messenger

Aliases:
   • Mcafee: W32/Sdbot.worm.gen.h
   • Sophos: Mal/Behav-057
   • Grisoft: BackDoor.Generic3.RZA
   • Eset: Win32/IRCBot.UE
   • Bitdefender: Generic.PWStealer.724E7E99

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

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

Files It copies itself to the following location:
• %SYSDIR%\dllcache\updtftpini.exe

It deletes the initially executed copy of itself.

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

– [HKLM\SYSTEM\CurrentControlSet\Services\Microsoft windows FTPd\
   Security]
   • "Security"=%hex values%

– [HKLM\SYSTEM\CurrentControlSet\Services\Microsoft windows FTPd]
   • "Type"=dword:00000110
     "Start"=dword:00000002
     "ErrorControl"=dword:00000000
     "ImagePath"="%SYSDIR%\dllcache\updtftpini.exe"
     "DisplayName"="Microsoft windows FTPd"
     "ObjectName"="LocalSystem"
     "FailureActions"=%hex values%
     "Description"="Windows security FTPd update"

– [HKLM\SYSTEM\CurrentControlSet\Services\Microsoft windows FTPd\
   Enum]
   • "0"="Root\\LEGACY_MICROSOFT_WINDOWS_FTPD\\0000"
     "Count"=dword:00000001
     "NextInstance"=dword:00000001

The following registry keys are added:

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_MICROSOFT_WINDOWS_FTPD]
   • "NextInstance"=dword:00000001

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_MICROSOFT_WINDOWS_FTPD\0000]
   • "Service"="Microsoft windows FTPd"
   • "Legacy"=dword:00000001
   • "ConfigFlags"=dword:00000000
   • "Class"="LegacyDriver"
   • "ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
   • "DeviceDesc"="Microsoft windows FTPd"

– [HKLM\SYSTEM\CurrentControlSet\Enum\Root\
   LEGACY_MICROSOFT_WINDOWS_FTPD\0000\Control]
   • "*NewlyCreated*"=dword:00000000
   • "ActiveService"="Microsoft windows FTPd"

The following registry key is changed:

– [HKLM\SYSTEM\ControlSet001\Control\ServiceCurrent]
   New value:
   • @=dword:0000000d

Messenger It is spreading via Messenger. The characteristics are described below:

– AIM Messenger

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:
   • C$
   • D$

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:
   • www; windows; web; visitor; test2; test1; test; temp; telnet; ruler;
      remote; real; random; qwerty; public; pub; private; poiuytre;
      password; passwd; passoracle; one; nopass; nobody; nick; newpass; new;
      network; monitor; money; manager; mail; login; internet; install;
      hello; guest; free; demo; default; debug; database; crew; computer;
      coffee; bin; beta; backup; backdoor; anonymous; anon; alpha; adm;
      access; abc123; abc; system; sys; super; sql; shit; shadow; setup;
      security; secure; secret; 123456789; 12345678; 1234567; 123456; 12345;
      1234; 123; 00000000; 0000000; 000000; 00000; 0000; 000; server;
      asdfgh; admin; root

Exploit:
It makes use of the following Exploits:
– MS02-061 (Elevation of Privilege in SQL Server Web)
– MS04-007 (ASN.1 Vulnerability)
–MS06-040 (Vulnerability in Server Service)

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.

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

Server: freedoom.suicidegaming.**********
Port: 4512
Channel: #sm
Nickname: [%number%]USA|%Windows version%-SP%number%[P]%six-digit random character string%
Password: 2pac

– This malware has the ability to collect and send information such as:
    • Platform ID
    • Information about the Windows operating system

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Launch DDoS SYN flood
    • disconnect from IRC server
    • Download file
    • Execute file
    • Join IRC channel
    • Leave IRC channel
    • Perform network scan
    • Perform port redirection
    • Shut down system
    • Start keylog
    • Start spreading routine
    • Updates itself

Backdoor The following ports are opened:

– %SYSDIR%\dllcache\updtftpini.exe on a random TCP port in order to provide an FTP server.
– %SYSDIR%\dllcache\updtftpini.exe on a random TCP port in order to provide an HTTP server.

Miscellaneous Mutex:
It creates the following Mutex:
• windxws

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.

See a brief description here.

Description inserted by Monica Ghitun on Thu, 02 Nov 2006 16:02 (GMT+1)
Description updated by Monica Ghitun on Tue, 21 Nov 2006 15:04 (GMT+1)

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