WORM_SDBOT.APP

Malware type: Worm

Aliases: W32.Spybot.Worm, W32/Rbot-WD, W32/Sdbot.worm, Win32.Rbot.BSR

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 98, ME, NT, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This worm spreads through network shares. It searches for and lists down the available network shares, where it then attempts to drop a copy of itself.

It also generates IP addresses and attempts to drop a copy of itself to the target address' default shares. It may also use a list of strings as user names and passwords in order to gain access to password-protected shares.

This worm has backdoor capabilities, and may execute commands coming from a remote malicious user. It also steals the CD keys, serial numbers, and product IDs of certain applications installed on the affected system.

For additional information about this threat, see:

Description created: Feb. 18, 2005 12:47:31 AM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 71,975 Bytes

Initial samples received on: Feb 18, 2005

Compression type: MEW

Variant ofWORM_SDBOT.GEN

Payload 1: Steals CD keys

Payload 2: Performs backdoor routines

Details:

Installation and Autostart Techniques

This memory-resident worm may arrive via network shares. Upon execution, it drops a copy of itself in the Windows system folder as the file XXTRA32.EXE.

It creates the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
mark the service = "xxtra32.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
mark the service = "xxtra32.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
mark the service = "xxtra32.exe"

Network Propagation

This worm spreads through network shares. It searches for and lists down the available network shares, where it then attempts to drop a copy of itself.

It also generates IP addresses and attempts to drop a copy of itself to the target address' default shares, such as the following:

  • Admin$
  • Print$

It may also use the following list of strings as user names and passwords in order to gain access to password-protected shares:

  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • access
  • accounting
  • accounts
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • backup
  • bitch
  • blank
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • computer
  • control
  • database
  • databasepass
  • databasepassword
  • db1234
  • dbpass
  • dbpassword
  • default
  • domain
  • domainpass
  • domainpassword
  • exchange
  • george
  • guest
  • hello
  • homeuser
  • internet
  • intranet
  • katie
  • linux
  • login
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • owner
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • staff
  • student
  • susan
  • system
  • teacher
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • wwwadmin

For every successful drop of the worm copy into a share, the dropped file is remotely executed as a service.

Backdoor Capabilities

This worm has backdoor capabilities. It connects to a remote Internet Relay Chat server and joins a specific channel, where it then receives commands coming from a remote malicious user.

The remote user may then perform the following commands on the affected system:

  • Change IRC server and channel where the worm connects to
  • Download and execute files
  • Flush DNS cache
  • Add/Remove default network shares
  • Get system information such as the following:
    • CPU speed
    • Free memory
    • Uptime
    • Free disk space
  • Add/Remove services
  • Add, remove, or view registry entries
  • Delete files
  • Emulate an FTP server
  • List and terminate services and processes
  • Scan local area network for listening ports
  • Emulate a proxy server
  • Logs keystrokes and obtain screenshots

Denial of Service

This worm is able to perform the following distributed denial of service (DDoS) attacks against a target site:

  • HTTP flood
  • Ping flood
  • SYN flood
  • UPD flood

Information Theft

This worm is also capable of stealing the CD keys, serial numbers, and even application product IDs of the following software products, if installed on the affected system:

  • Battlefield 1942
  • Battlefield 1942 (Road To Rome)
  • Battlefield 1942 (Secret Weapons of WWII)
  • Battlefield Vietnam
  • Black and White
  • Call of Duty
  • Chrome
  • Command and Conquer: Generals
  • Command and Conquer: Generals (Zero Hour)
  • Command and Conquer: Red Alert
  • Command and Conquer: Red Alert 2
  • Command and Conquer: Tiberian Sun
  • Counter-Strike (Retail)
  • FarCry
  • FIFA 2002
  • FIFA 2003
  • Freedom Force
  • Global Operations
  • Ground Control II
  • Gunman Chronicles
  • Half-Life
  • Hidden & Dangerous 2
  • IGI 2: Covert Strike
  • Industry Giant 2
  • James Bond 007: Nightfire
  • Joint Operations
  • Legends of Might and Magic
  • Medal of Honor: Allied Assault
  • Medal of Honor: Allied Assault: Breakthrough
  • Medal of Honor: Allied Assault: Spearhead
  • Nascar Racing 2002
  • Nascar Racing 2003
  • Need For Speed Hot Pursuit 2
  • Need For Speed: Underground
  • Neverwinter Nights
  • Neverwinter Nights (Hordes of the Underdark)
  • Neverwinter Nights (Shadows of Undrentide)
  • NHL 2002
  • NHL 2003
  • Rainbow Six III RavenShield
  • Shogun: Total War: Warlord Edition
  • Soldier of Fortune II - Double Helix
  • Soldiers Of Anarchy
  • The Gladiators
  • Unreal Tournament 2003
  • Unreal Tournament 2004

Other Details

This worm runs on Windows 98, ME, NT, 2000, and XP.

Analysis By: Roberto Franco Tayag


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.419.05

Pattern release date: Feb 18, 2005


Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.

Solution:

Terminating the Malware Program

This procedure terminates the running malware process.

  1. Open Windows Task Manager.
    � On Windows 95, 98, and ME, press
    CTRL%20ALT%20DELETE
    � On Windows NT, 2000, and XP, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the process:
    xxtra32.exe
  3. Select the malware process, then press either the End Task or the End Process button, depending on the version of Windows on your system.
  4. To check if the malware process has been terminated, close Task Manager, and then open it again.
  5. Close Task Manager.

*NOTE: On systems running Windows 95, 98, and ME, Windows Task Manager may not show certain processes. You can use a third party process viewer such as Process Explorer to terminate the malware process. Otherwise, continue with the next procedure, noting additional instructions.

Removing Autostart Entries from the Registry

Removing autostart entries from the registry prevents the malware from executing at startup.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>Run
  3. In the right panel, locate and delete the entry:
    mark the service = "xxtra32.exe"
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>RunServices
  5. In the right panel, locate and delete the entry:
    mark the service = "xxtra32.exe"
  6. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>Run
  7. In the right panel, locate and delete the entry:
    mark the service = "xxtra32.exe"
  8. Close Registry Editor.

NOTE: If you were not able to terminate the malware process as described in the previous procedure, restart your system.

Additional Windows ME/XP Cleaning Instructions

Users running Windows ME and XP must disable System Restore to allow full scanning of infected systems.

Users running other Windows versions can proceed with the succeeding procedure set(s).

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete all files detected as WORM_SDBOT.APP. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro�s online virus scanner.




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