Virus:Worm/Sdbot.1222144
Date discovered:02/12/2006
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:1.222.144 Bytes
MD5 checksum:bb0e25c27ddd351b55a3baba9b2d1ae0
VDF version:6.36.01.115
IVDF version:6.36.01.120 - Saturday, December 2, 2006

 General Method of propagation:
   • Local network


Aliases:
   •  Kaspersky: Backdoor.Win32.SdBot.bah
   •  F-Secure: Backdoor.Win32.SdBot.bah
   •  Sophos: W32/Sdbot-CWC
   •  Grisoft: IRC/BackDoor.SdBot2.MLU
   •  Eset: IRC/SdBot
   •  Bitdefender: Backdoor.Sdbot.B


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


Side effects:
   • Drops files
   • Lowers security settings
   • Registry modification
   • Steals information
   • Third party control

 Files It copies itself to the following location:
   • %WINDIR%\icmp1.exe



It deletes the initially executed copy of itself.



The following files are created:

– %TEMPDIR%\removeMe%four-digit random character string%.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.
– %SYSDIR%\drivers\oreans32.sys

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

– [HKLM\SYSTEM\CurrentControlSet\Services\oreans32]
   • "Type"=dword:00000001
   • "Start"=dword:00000001
   • "ErrorControl"=dword:00000001
   • "ImagePath"="\??\%SYSDIR%\drivers\oreans32.sys"
   • "DisplayName"="oreans32"

– [HKLM\SYSTEM\CurrentControlSet\Services\oreans32\Security]
   • "Security"=%hex values%

– [HKLM\SYSTEM\CurrentControlSet\Services\oreans32\Enum]
   • "0"="Root\\LEGACY_OREANS32\\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001



The following registry keys are changed:

– [HKLM\SYSTEM\ControlSet\Control]
   Old value:
   • "WaitToKillServiceTimeout"="20000"
   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

– [HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile]
   Old value:
   • "EnableFirewall"=%user defined settings%
   New value:
   • "EnableFirewall"=dword:00000000

– [HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile]
   Old value:
   • "EnableFirewall"=%user defined settings%
   New value:
   • "EnableFirewall"=dword:00000000

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update]
   Old value:
   • "AUState"=dword:00000007
   • "AUOptions"=dword:00000001
   New value:
   • "AUState"=dword:00000001
   • "AUOptions"=dword:00000001

– [HKLM\SYSTEM\CurrentControlSet\Services\wscsvc]
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr]
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry]
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\Messenger]
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000004

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

– [HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
   New value:
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– [HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\
   parameters]
   New value:
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– [HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
   Old value:
   • "DoNotAllowXPSP2"=%user defined settings%
   New value:
   • "DoNotAllowXPSP2"=dword:00000001

– [HKLM\SOFTWARE\Microsoft\Ole]
   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:
   • Z$
   • Y$
   • X$
   • W$
   • V$
   • U$
   • T$
   • S$
   • R$
   • Q$
   • P$
   • O$
   • N$
   • M$
   • L$
   • K$
   • J$
   • I$
   • H$
   • G$
   • F$
   • E$
   • D$
   • C$
   • ADMIN$
   • IPC$


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)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)
– MS06-040 (Vulnerability in Server Service)


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: olin.myip.**********
Port: 7000
Server password: kurva
Channel: #NPX#
Nickname: [P01|USA|%five-digit random character string%]
Password: NetAPIX



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


– Furthermore it has the ability to perform actions such as:
    • Disable network shares
    • Edit registry
    • Enable network shares
    • Send emails
    • Updates itself

 Process termination  List of services that are disabled:
   • Security Center
   • Windows Firewall/ICS
   • Remote Registry
   • Telnet
   • wscsvc
   • SharedAccess
   • Messenger
   • RemoteRegistry
   • Tlntsvr

 Backdoor Contact server:
All of the following:
   • http://hpcgi1.nifty.com/mute/c/**********
   • http://www.age.ne.jp/x/maxwell/cgi-bin/**********
   • http://www2.dokidoki.ne.jp/tomocrus/cgi-bin/check/**********
   • http://cgi14.plala.or.jp/little_w/**********
   • http://yia.s22.xrea.com/**********
   • http://www.kinchan.net/cgi-bin/**********

As a result it may send some information. This is done via the HTTP GET request on a CGI script.

 Miscellaneous Anti debugging
It checks if the following program is running:
   • SoftIce



File patching:
In order to increase the number of maximum connections it has the capability to modify the tcpip.sys. It may result in a corruption of that file and break network connectivity.

 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.

Description inserted by Adriana Popa on Monday, January 8, 2007
Description updated by Adriana Popa on Monday, January 8, 2007

Back . . . .