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Virus:Worm/RBot.54532
Date discovered:14/02/2006
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:257.536 Bytes
MD5 checksum:ea400Fe8fe2364503bfe7175ba2390d7
VDF version:6.33.00.227

 General Method of propagation:
   • Local network


Aliases:
   •  Symantec: W32.Spybot.Worm
   •  Mcafee: W32/Kelvir.worm.gen
   •  Kaspersky: Backdoor.Win32.Aimbot.by
   •  TrendMicro: WORM_SDBOT.DEO
   •  F-Secure: Backdoor.Win32.Aimbot.by
   •  Sophos: W32/Tilebot-DB
   •  Panda: W32/Sdbot.GFH.worm
   •  VirusBuster: Worm.SmallBot.F
   •  Bitdefender: Backdoor.SDBot.AKZ


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%\termsvrs.exe



It deletes the initially executed copy of itself.



The following file is created:

%SYSDIR%\rofl.sys Used to hide a process.

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

HKLM\SYSTEM\CurrentControlSet\Services\P-SYS Service
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%WINDIR%\termsvrs.exe"
   • "DisplayName"="P-SYS"
   • "ObjectName"="LocalSystem"
   • "FailureActions"=%hex values%
   • "Description"="P-SYS Service"



The following registry keys are added:

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
   • "IT"="%current date%"
   • "RU"= %double-byte-characters%



The following registry keys are changed:

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

Deactivate Windows Firewall:
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:
   • "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\SYSTEM\CurrentControlSet\Services\lanmanworkstation\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"

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

 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:
   • server; asdfgh; asdf; !@; $%^&; !@; $%^; !@; $%; !@; $; 654321;
      123456; 12345; 1234; 123; 111; administrator



Exploit:
It makes use of the following Exploit:
– 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: x.exceed**********
Port: 6522
Server password: reptys
Channel: #reptiles#
Nickname: [P00|USA|%five-digit random character string%]
Password: etsdg



 This malware has the ability to collect and send the following information:
    • Cached passwords
     Collected Email addresses
    • CPU speed
    • Current user
     Details about drivers
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Platform ID
    • 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
    • Edit registry
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform DDoS attack
     Perform network scan
    • Perform port redirection
     Register a service
    • Restart system
     Start spreading routine
    • Terminate malware
    • Terminate process
     Updates itself
    • Upload file
     Visit a website

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

 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/**********


 Rootkit Technology It is a malware-specific technology. The malware hides its presence from system utilities, security applications and in the end, from the user.


Hides the following:
– Its own file
– Its own process

 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.

Beschrijving ingevoegd door Irina Boldea op dinsdag 18 april 2006
Beschrijving bijgewerkt door Irina Boldea op donderdag 20 april 2006

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