WORM_AGOBOT.AAU

Malware type: Worm

Aliases: Backdoor.Win32.Wootbot.p (Kaspersky), W32/Sdbot.worm.gen.as (McAfee), W32.Spybot.Worm (Symantec), Worm/WootBot.75264 (Avira), W32/Forbot-CQ (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 memory-resident worm propagates across networks by exploiting the Windows LSASS vulnerability, which could allow remote code execution on an affected system. For more information about the said Windows vulnerability, please refer to the following Microsoft Web page:

It also attempts to delete several antivirus and security programs and certain shared folders.

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

For additional information about this threat, see:

Description created: Nov. 6, 2004 3:57:53 AM GMT -0800
Description updated: Nov. 5, 2004 3:57:51 AM GMT -0800


TECHNICAL DETAILS


Size of malware: 75,264 Bytes

Initial samples received on: Nov 5, 2004

Payload 1: Compromises system security

Trigger condition 1: Upon execution

Payload 2: Terminates certain processes

Trigger condition 1: Upon execution

Details:

Installation and Autostart Techniques

Upon execution, this memory-resident worm drops a copy of itself as MSCONFIG.EXE in the Windows system folder.

To enable its automatic execution at every system startup, it creates the following registry entries:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
MSDEV ="MSCONFIG.EXE""

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
MSDEV ="MSCONFIG.EXE""

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunOnce
MSDEV ="MSCONFIG.EXE""

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
MSDEV ="MSCONFIG.EXE""

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunServices
MSDEV ="MSCONFIG.EXE""

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
MSDEV ="MSCONFIG.EXE""

It also adds its own Windows service called MSDEV.EXE.

Network Propagation and Exploits

This worm propagates across networks by exploiting the Windows LSASS vulnerability, which could allow remote code execution on an affected system.

For more information about the said vulnerability, please refer to the following Microsoft Web page:

This worm may also drop the file C.BAT to update the copy of itself.

Moreover, it has an Internet Relay Chat (IRC) backdoor component. It is capable of removing the following shared folders:

  • ADMIN$
  • C$
  • D$
  • IPC$

Process Termination

This worm attempts to terminate the following antivirus and security programs as well as processes of other malware:

  • _AVP32.EXE
  • _AVPCC.EXE
  • _AVPM.EXE
  • 0X1FE.EXE
  • AD-WATCH.EXE
  • AGENTW.EXE
  • AGOBOT.EXE
  • APVXDWIN.EXE
  • AVKPOP.EXE
  • AVKSERVICE.EXE
  • AVKWCTL9.EXE
  • AVPM.EXE
  • BBEAGLE.EXE
  • BIRCD.EXE
  • BLACKD.EXE
  • CCAPP.EXE
  • CCEVTMGR.EXE
  • CCPXYSVC.EXE
  • CHANGE.EXE
  • CLEANER.EXE
  • CLEANER3.EXE
  • CMD.EXE
  • CMD1.EXE
  • CMD2.EXE
  • CPD.EXE
  • CRYPTO3.JPG
  • CSRSR.EXE
  • CSRSRS.EXE
  • CSSSS.EXE
  • D3DUPDATE.EXE
  • DEFALERT.EXE
  • DEFSCANGUI.EXE
  • EXPORE.EXE
  • F-AGOBOT.EXE
  • FAMEH32.EXE
  • FBI.EXE
  • FCH32.EXE
  • FIH32.EXE
  • FNRB32.EXE
  • FORBOT.EXE
  • FSAA.EXE
  • FSAV32.EXE
  • FSGK32.EXE
  • FSM32.EXE
  • FSMA32.EXE
  • FSMB32.EXE
  • F-STOPW.EXE
  • GBMENU.EXE
  • GBPOLL.EXE
  • GOV.EXE
  • HIJACKTHIS.EXE
  • I11R54N4.EXE
  • IAMAPP.EXE
  • IAMSERV.EXE
  • IEXPLORER.EXE
  • INST.EXEEXPLORE32.EXE
  • IRUN4.EXE
  • JPG.EXEBOT.EXE
  • LOCKDOWN2000.EXE
  • LSASS2.EXE
  • LSSAS.EXE
  • MSCONFIG.EXE
  • MSCVB32.EXE
  • NORTON123.EXE
  • NOTSTART.EXE
  • NOVARG_UPX.ZIP
  • NPSCHECK.EXE
  • NTRTSCAN.EXE
  • NVSVC32.EXE
  • OPR0371I.JS
  • PANDAAVENGINE.EXE
  • PAVPROXY.EXE
  • PCCNTMON.EXE
  • PCCWIN97.EXE
  • PCSCAN.EXE
  • PENIS32.EXE
  • PHATBOT.EXE
  • PHOTO.ZIP
  • PIC33.SCR
  • RAPAPP.EXE
  • RATE.EXE
  • RBOT.EXE
  • REGEDIT.EXE
  • RTVSCAN.EXE
  • RXB1OT.EXE
  • RXBOT.EXE
  • SBSERV.EXE
  • SERASA.EXE
  • SERASA.EXE.A
  • SMSSS.EXE
  • SPYBOT.EXE
  • SSATE.EXE
  • SUB7.EXE
  • SVCHOSTING.EXE
  • SYSINFO.EXE
  • SYSMONXP.EXE
  • TASKMG.EXE
  • TASKMGR.EXE
  • TASKMGR1.EXE
  • TCPVIEW.EXE
  • TCPVIEW1.EXE
  • VBCMSERV.EXE
  • VIDEO.EXE
  • VSHWIN32.EXE
  • VSMON.EXE
  • WINAGENT.EXE
  • WINDOWSUPDATE.EXE
  • WINSET32.EXE
  • WINSYS.EXE
  • WINUPD.EXE
  • WIRCD.EXE
  • WRADMIN.EXE
  • WRCTRL.EXE
  • WUARCLT.EXE
  • WUPDATE.EXE
  • XPF202EN.EXE
  • ZAPRO.EXE
  • ZAPRO.EXE
  • ZAPSETUP3001.EXE
  • ZATUTOR.EXE
  • ZAUINST.EXE
  • ZONALM2601.EXE
  • ZONEALARM.EXE

Other Details

This worm is compressed using PE_Patch, PECompact, and PecBundle.



Analysis by: Juan Cesar Cuevas


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.239.03

Pattern release date: Nov 5, 2004


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:

AUTOMATIC REMOVAL INSTRUCTIONS

To automatically remove this malware from your system, please use Trend Micro Damage Cleanup Engine and Template.

MANUAL REMOVAL INSTRUCTIONS

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:
    MSCONFIG.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:
    MSDEV = �MSCONFIG.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:
    MSDEV = �MSCONFIG.EXE�
  6. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>RunOnce
  7. In the right panel, locate and delete the entry:
    MSDEV = �MSCONFIG.EXE�
  8. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>Run
  9. In the right panel, locate and delete the entry:
    MSDEV = �MSCONFIG.EXE�
  10. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>RunServices
  11. In the right panel, locate and delete the entry:
    MSDEV = �MSCONFIG.EXE�
  12. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>RunOnce
  13. In the right panel, locate and delete the entry:
    MSDEV = �MSCONFIG.EXE�
  14. 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 sets.

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete all files detected as WORM_AGOBOT.AAU. 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 free online virus scanner.

Applying Patches

This malware exploits a known vulnerability in Windows. Download and install the fix patch supplied by Microsoft. Refrain from using this product until the appropriate patch has been installed. Trend Micro advises users to download critical patches upon release by vendors from the following link:




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