WORM_RBOT.AQD

Malware type: Worm

Aliases: W32/Sdbot.worm.gen (McAfee), W32.Spybot.Worm (Symantec), Worm/SdBot.CEL (Avira), Mal/EncPk-AM (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This worm spreads by dropping a copy of itself to certain network shares. It uses a list of user names and passwords to gain access to target machines.

It also takes advantage of the following Windows vulnerabilities to propagate across networks:

  • IIS5/WebDAV vulnerability
  • RPC/DCOM vulnerability
  • LSASS vulnerability

More information about these vulnerabilities can be found on the following pages:

This worm has backdoor capabilities, and may execute commands coming from a remote malicious user. It also steals the CD keys of certain applications, and terminates processes related to certain malware variants.

For additional information about this threat, see:

Description created: Feb. 16, 2005 9:08:49 PM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 102,912 Bytes

Ports used: Varies

Initial samples received on: Feb 16, 2005

Vulnerability used:  (MS04-011) Security Update for Microsoft Windows (835732), (MS03-007) Unchecked Buffer In Windows Component Could Cause Server Compromise (815021), (MS03-026) Buffer Overrun In RPC Interface Could Allow Code Execution

Variant ofWORM_RBOT.GEN

Payload 1: Steals CD keys

Payload 2: Performs backdoor routines

Payload 3: Terminates processes

Details:

Installation and Autostart Techniques

Upon execution, this memory-resident worm drops a copy of itself in the Windows system folder as the file MDNZ.EXE. It sets its file attributes to hidden and read-only to avoid easy detection.

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

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
MDN = "MDNZ.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
MDN = "MDNZ.exe"

Network Propagation and Exploits

This worm spreads by dropping a copy of itself to the following network shares:

  • Admin$\system32
  • C$\Windows\system32
  • C$\WINNT\system32
  • IPC$

It uses the following list of user names and passwords to gain access on target machines:

  • 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
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • owner
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • staff
  • student
  • susan
  • teacher
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • Wwwadmin

This worm also takes advantage of the following Windows vulnerabilities to propagate across networks:

  • IIS5/WebDAV vulnerability
  • RPC/DCOM vulnerability
  • LSASS vulnerability

More information about these vulnerabilities can be found on the following pages:

Backdoor Capabilities

This worm has backdoor capabilities. It connects to an Internet Relay Chat (IRC) server and joins certain channels, where it can then receive commands coming from a remote malicious user to do the following:

  • Change IRC channels, servers, and nicks
  • Flush the DNS cache
  • Download, execute, and send files using FTP, DCC, or UDP
  • Visit certain Web sites
  • Log keystrokes
  • List processes
  • List logs

Information Theft

The malware is able to retrieve keys of known software gaming programs if they are present in the infected system. The games are the following:

  • Battlefield 1942
  • Battlefield 1942 (Road To Rome)
  • Battlefield 1942 (Secret Weapons of WWII)
  • Battlefield Vietnam
  • Black and White
  • 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
  • FIFA 2002
  • FIFA 2003
  • Freedom Force
  • Global Operations
  • Gunman Chronicles
  • Half-Life
  • IGI 2: Covert Strike
  • Industry Giant 2
  • James Bond 007: Nightfire
  • 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

Process Termination

This worm terminates the following processes, which are related to certain malware variants:

  • Beagle1
  • beagle2
  • DameWare
  • dcom1025
  • Dcom135
  • Dcom445
  • iis5ssl
  • Kuang2
  • lsass
  • lsass_139
  • MSSQL
  • mydoom
  • netdevil
  • optix
  • sasser
  • WksSvc
  • wkssvc2
  • WKSSVC_Eng
  • WKSSVC_Other
  • wkssvcENG
  • wkssvcOth

Other Details

This worm runs on Windows 95, 98, ME, NT, 2000, and XP.

Analysis By: Melvin Dantis Dadios


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.416.00

Pattern release date: Feb 16, 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:
    MDNZ.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:
    MDN = "MDNZ.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:
    MDN = "MDNZ.exe"
  6. Close Registry Editor.

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

Enabling Show All Files

This procedure allows you to access hidden malware files using Windows Explorer.

� On Windows 95, 98, and NT

  1. Open Windows Explorer. Right-click Start then click Explore.
  2. On the View menu, click Options or Folders Options.
  3. Click the View tab.
  4. Select Show all files, then click OK.

� On Windows ME, 2000, and XP

  1. Open Windows Explorer. Right-click Start then click Explore.
  2. On the Tools menu, click Folder Options.
  3. Click the View tab.
  4. Select Show hidden files and folders, then click OK.

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_RBOT.AQD. 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.

Applying Patches

This malware exploits known vulnerabilities in Windows. Download and install the fix patch supplied by Microsoft in the following pages:

Refrain from using this product until the appropriate patch has been installed. Trend Micro advises users to download critical patches upon release by vendors.




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