WORM_RBOT.AUO

Malware type: Worm

Aliases: W32/Sdbot.worm.gen (McAfee), W32.Spybot.Worm (Symantec), Worm/Spybot.135168.9 (Avira), Mal/EncPk-M (Sophos), VirTool:Win32/Obfuscator.E (Microsoft)

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 propagates via network shares. It gathers available lists of user names and passwords from an affected sytem. It then lists down available network shares and uses the gathered user names and passwords to access and drop copies of itself into the network shares.

It also generates IP addresses and attempts to drop copies of itself into certain shares of target addresses. It likewise uses the gathered user names and passwords to access these shares. It also uses a list of strings as user names and passwords apart from those that it gathers.

This worm also exploits the following Windows vulnerabilities to propagate across networks:

  • SQL Server Buffer Overflow vulnerability
  • IIS/WebDAV vulnerability
  • Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability
  • LSASS vulnerability

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

This worm has backdoor capabilities. It connects to a remote IRC server and joins a specific IRC channel, where it listens for commands coming from a remote malicious user. It executes these commands locally on an affected system, providing the remote user virtual control over the system.

It terminates processes associated either with antivirus applications and debugging tools or with other malware.

It is capable of gathering CD keys, serial numbers, and application product IDs of certain game applications. It also launches Carnivore network sniffer to retrieve passwords and other information.

For additional information about this threat, see:

Description created: Mar. 15, 2005 4:55:26 PM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 94,208 Bytes

Initial samples received on: Mar 15, 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, (MS02-061) Elevation of Privilege in SQL Server Web Tasks (Q316333)

Payload 1: Compromises system security

Payload 2: Terminates processes

Payload 3: Steals CD keys, serial numbers, and application product IDs

Details:

Arrival and Installation

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

It creates the following registry entries to ensure its automatic execution at every Windows startup:

HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run
DynHttp Dns Binary = "dynizari.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\Run
DynHttp Dns Binary = "dynizari.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\
CurrentVersion\RunServices
DynHttp Dns Binary = "dynizari.exe"

It also modifies the following registry entry:

HKEY_LOCAL_MACHINE\Software\Microsoft\Ole
EnableDCOM = "N"

(Note: The default value of this registry entry is "Y".)

Network Propagation and Exploits

This worm propagates via network shares. It gathers available lists of user names and passwords from an affected sytem. It then lists down available network shares and uses the gathered user names and passwords to access and drop copies of itself into the network shares.

It also generates IP addresses and attempts to drop copies of itself into the following default shares of target addresses:

  • ADMIN$
  • IPC$

It likewise uses the gathered user names and passwords to access these shares. It also uses the following list of strings as user names and passwords apart from those that it gathers:

  • 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

This worm also exploits the following Windows vulnerabilities to propagate across networks:

  • SQL Server Buffer Overflow vulnerability
  • IIS/WebDAV vulnerability
  • Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability
  • LSASS vulnerability

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

Backdoor Capabilities

This worm has backdoor capabilities. It connects to a remote IRC server and joins a specific IRC channel, where it listens for commands coming from a remote malicious user, such as the following:

  • Perform basic IRC commands
  • Perform basic FTP commands
  • Scan ports
  • Sniff packets for specific strings
  • Perform any of the following flood attacks:
    • ICMP flood
    • Ping flood
    • SYN flood
    • TCP flood
    • UDP flood
  • Open a remote command shell
  • Download files
  • Open FTP server
  • Start up proxy server
  • Send email
  • Get system and network information
  • Get Windows login password
  • List, start, or stop services
  • Create or list user accounts
  • Add, delete, or list network shares
  • Enable or disable DCOM
  • Enable or disable anonymous login
  • Flush DNS Cache

It executes these commands locally on an affected system, providing the remote user virtual control over the system.

Process Termination

This worm terminates the following processes, which are associated either with antivirus applications and debugging tools or with other malware:

  • bbeagle.exe
  • d3dupdate.exe
  • i11r54n4.exe
  • irun4.exe
  • msblast.exe
  • msconfig.exe
  • mscvb32.exe
  • navapw32.exe
  • navw32.exe
  • netstat.exe
  • PandaAVEngine.exe
  • Penis32.exe
  • rate.exe
  • regedit.exe
  • ssate.exe
  • sysinfo.exe
  • SysMonXP.exe
  • teekids.exe
  • wincfg32.exetaskmon.exe
  • winsys.exe
  • winupd.exe
  • zapro.exe
  • zonealarm.exe

Information Theft

This worm is capable of gathering CD keys, serial numbers, and application product IDs of the following software:

  • Battlefield 1942
  • Battlefield 1942: Secret Weapons Of WWII
  • Battlefield 1942: The Road To Rome
  • Battlefield 1942: Vietnam
  • Black and White
  • Call of Duty
  • Command and Conquer: Generals
  • Command and Conquer: Generals: Zero Hour
  • Command and Conquer: Red Alert2
  • Command and Conquer: Tiberian Sun
  • Counter-Strike
  • FIFA 2002
  • FIFA 2003
  • Freedom Force
  • Global Operations
  • Gunman Chronicles
  • Half-Life
  • Hidden and Dangerous 2
  • IGI2: Covert Strike
  • Industry Giant 2
  • James Bond 007: Nightfire
  • 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
  • NHL 2002
  • NHL 2003
  • Ravenshield
  • Shogun: Total War: Warlord Edition
  • Soldier Of Fortune 2
  • Soldiers Of Anarchy
  • The Gladiators
  • Unreal Tournament 2003
  • Unreal Tournament 2004

This worm also launches Carnivore network sniffer to retrieve passwords and other information. It searches for the following strings:

  • :.login
  • :,login
  • :!login
  • :@login
  • :$login
  • :%login
  • login
  • :&login
  • :*login
  • :-login
  • :%20login
  • :/login
  • :\login
  • :=login
  • :?login
  • :'login
  • login
  • :~login
  • : login
  • :.auth
  • :,auth
  • :!auth
  • :@auth
  • :$auth
  • :%auth
  • :&auth
  • :*auth
  • :-auth
  • :%20auth
  • :/auth
  • :\auth
  • :=auth
  • :?auth
  • :'auth
  • :~auth
  • : auth
  • :.hashin
  • :!hashin
  • :$hashin
  • :%hashin
  • :.secure
  • :!secure
  • :.syn
  • :!syn
  • :$syn
  • :%syn
  • CDKey
  • JOIN #
  • NICK
  • OPER
  • oper
  • now an IRC Operator
  • USER
  • PASS
  • paypal
  • PAYPAL
  • paypal.com
  • PAYPAL.COM

Other Details

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

Analysis By: Millette Regulacio


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.498.00

Pattern release date: Mar 15, 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:

Identifying the Malware Program

To remove this malware, first identify the malware program.

  1. Scan your system with your Trend Micro antivirus product.
  2. NOTE all files detected as WORM_RBOT.AUO.

Trend Micro customers need to download the latest pattern file before scanning their system. Other users can use Housecall, Trend Micro�s online virus scanner.

Terminating the Malware Program

This procedure terminates the running malware process. You will need the name(s) of the file(s) detected earlier.

  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 malware file(s) detected earlier.
  3. Select one of the detected files, then press either the End Task or the End Process button, depending on the version of Windows on your system.
  4. Do the same for all detected malware files in the list of running processes.
  5. To check if the malware process has been terminated, close Task Manager, and then open it again.
  6. 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:
    DynHttp Dns Binary = "dynizari.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:
    DynHttp Dns Binary = "dynizari.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:
    DynHttp Dns Binary = "dynizari.exe"

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

Restoring Modified Entry in the Registry

  1. Still in the Registry Editor, in the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Ole
  2. In the right panel, locate the entry:
    EnableDCOM = "N"
  3. Replace this entry with its default value, as follows:
    EnableDCOM = "Y"
  4. Close Registry Editor.

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.AUO. 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 patches from the following Microsoft Web pages:

Trend Micro advises users to download critical patches upon release by vendors.




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