WORM_AGOBOT.AEE

Malware type: Worm

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 by dropping copies of itself in the following network shares:

  • ADMIN$\system32
  • C$\Windows\system32
  • C$\WINNT\system32

If these shared folders have restricted access rights, it uses a hardcoded list of user names and passwords to access them.

It also exploits the following vulnerabilities to propagate:

  • Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability
  • Windows LSASS (Local Security Authority Subsystem Service) vulnerability

For detailed information about these vulnerabilities, refer to the following Microsoft pages:

This worm has a built-in Internet Relay Chat (IRC) client, which allows it to connect to an IRC channel using a random port. It then allows a malicious user to perform certain commands.

This worm steals Yahoo Messenger (YM) related information and the Windows product ID. It also steals the CD keys of popular game applications.

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

For additional information about this threat, see:

Description created: Dec. 28, 2004 8:12:26 AM GMT -0800
Description updated: Dec. 28, 2004 8:49:03 AM GMT -0800


TECHNICAL DETAILS


Size of malware: 358,864 Bytes

Initial samples received on: Dec 28, 2004

Payload 1: Compromises system security

Trigger condition 1: Upon execution

Details:

Installation and Autostart

Upon execution, this memory-resident worm drops a copy of itself in the Windows system folder as the file AIM95.EXE. It also registers this dropped file as the service AIM95 Startup.

It also drops the following files (for administration purposes) using read-only, hidden and system attributes:

  • ADMDLL.DLL
  • EXPIORER.EXE
  • RADDRV.DLL

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AIM95 Startup = �aim95.exe�

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
AIM95 Startup = �aim95.exe�

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
AIM95 Startup = �aim95.exe�

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunOnce
AIM95 Startup = �aim95.exe�

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
AIM95 Startup = �aim95.exe�

HKEY_USER\.DEFAULT\Software\Microsoft\
Windows\CurrentVersion\Run
AIM95 Startup = �aim95.exe�

HKEY_USER\.DEFAULT\Software\Microsoft\
Windows\CurrentVersion\RunOnce
AIM95 Startup = �aim95.exe�

Network Propagation and Exploit

This worm propagates by dropping copies of itself in the following network shares:

  • ADMIN$\system32
  • C$\Windows\system32
  • C$\WINNT\system32

If these shared folders have restricted access rights, it uses a hardcoded list of user names and passwords to access them.

It also exploits the following vulnerabilities to propagate:

  • Remote Procedure Call (RPC) Distributed Component Object Model (DCOM) vulnerability
  • Windows LSASS (Local Security Authority Subsystem Service) vulnerability

For detailed information about these vulnerabilities, refer to the following Microsoft pages:

Backdoor Capabilities

This worm has a built-in Internet Relay Chat (IRC) client, which allows it to connect to an IRC channel using a random port. It allows a malicious user to perform the following commands:

  • Delete network shares
  • Download, execute, and open files
  • Terminate processes
  • Obtain pertinent system information
  • Obtain Windows product ID
  • Perform basic IRC commands
  • Reboot the computer
  • Update the worm

Process Termination

This worm terminates the following processes, which are mostly associated with antivirus and monitoring applications:

  • _AVP32.EXE
  • _AVPCC.EXE
  • _AVPM.EXE
  • AckWin32.EXE
  • ACKWIN32.EXE
  • ADVXDWIN.EXE
  • AGENTSVR.EXE
  • agentw.EXE
  • ALERTSVC.EXE
  • ALOGSERV.EXE
  • AMON9X.EXE
  • ANTI-TROJAN.EXE
  • ANTIVIRUS.EXE
  • ANTS.EXE
  • APIMONITOR.EXE
  • APLICA32.EXE
  • apvxdwin.EXE
  • APVXDWIN.EXE
  • ATCON.EXE
  • ATGUARD.EXE
  • ATRO55EN.EXE
  • ATUPDATER.EXE
  • ATWATCH.EXE
  • AUPDATE.EXE
  • AUTODOWN.EXE
  • AutoTrace.EXE
  • AUTOUPDATE.EXE
  • AVCONSOL.EXE
  • AVE32.EXE
  • AVGCC32.EXE
  • Avgctrl.EXE
  • AVGCTRL.EXE
  • AVGNT.EXE
  • AvgServ.EXE
  • AVGSERV.EXE
  • AVGSERV9.EXE
  • AVGUARD.EXE
  • AVGW.EXE
  • avkpop.EXE
  • AvkServ.EXE
  • avkservice.EXE
  • avkwctl9.EXE
  • AVNT.EXE
  • AVP.EXE
  • AVP32.EXE
  • AVPCC.EXE
  • AVPDOS32.EXE
  • avpm.EXE
  • AVPM.EXE
  • AVPTC32.EXE
  • AVPUPD.EXE
  • Avsched32.EXE
  • AvSynMgr.AVSYNMGR.EXE
  • AVWIN95.EXE
  • AVWINNT.EXE
  • AVWUPD32.EXE
  • AVWUPSRV.EXE
  • AVXMONITOR9X.EXE
  • AVXMONITORNT.EXE
  • AVXQUAR.EXE
  • BD_PROFESSIONAL.EXE
  • BIDEF.EXE
  • BIDSERVER.EXE
  • BIPCP.EXE
  • BIPCPEVALSETUP.EXE
  • BISP.EXE
  • blackd.EXE
  • BLACKD.EXE
  • BlackICE.EXE
  • BLACKICE.EXE
  • BOOTWARN.EXE
  • BORG2.EXE
  • BS120.EXE
  • ccApp.EXE
  • ccEvtMgr.EXE
  • ccPxySvc.EXE
  • CDP.EXE
  • CFGWIZ.EXE
  • CFIADMIN.EXE
  • CFIAUDIT.EXE
  • CFINET.EXE
  • CFINET32.EXE
  • Claw95.EXE
  • Claw95cf.EXE
  • CLAW95CF.EXE
  • CLEAN.EXE
  • cleaner.EXE
  • CLEANER.EXE
  • cleaner3.EXE
  • CLEANER3.EXE
  • CLEANPC.EXE
  • CMGRDIAN.EXE
  • CMON016.EXE
  • CONNECTIONMONITOR.EXE
  • cpd.EXE
  • CPD.EXE
  • CPF9X206.EXE
  • CPFNT206.EXE
  • CTRL.EXE
  • CV.EXE
  • CWNB181.EXE
  • CWNTDWMO.EXE
  • defalert.EXE
  • defscangui.EXE
  • DEFWATCH.EXE
  • DEPUTY.EXE
  • DOORS.EXE
  • DPF.EXE
  • DPFSETUP.EXE
  • DRWATSON.EXE
  • DRWEB32.EXE
  • DVP95.EXE
  • DVP95_0.EXE
  • ECENGINE.EXE
  • EFPEADM.EXE
  • ENT.EXE
  • ESAFE.EXE
  • ESCANH95.EXE
  • ESCANHNT.EXE
  • ESCANV95.EXE
  • ESPWATCH.EXE
  • ETRUSTCIPE.EXE
  • EVPN.EXE
  • EXANTIVIRUS-CNET.EXE
  • EXE.AVXW.EXE
  • EXPERT.EXE
  • F-AGNT95.EXE
  • fameh32.EXE
  • FAST.EXE
  • fch32.EXE
  • fih32.EXE
  • FINDVIRU.EXE
  • FIREWALL.EXE
  • FLOWPROTECTOR.EXE
  • fnrb32.EXE
  • FPROT.EXE
  • F-PROT.EXE
  • F-PROT95.EXE
  • FP-WIN.EXE
  • FP-WIN_TRIAL.EXE
  • FRW.EXE
  • fsaa.EXE
  • FSAV.EXE
  • fsav32.EXE
  • FSAV530STBYB.EXE
  • FSAV530WTBYB.EXE
  • FSAV95.EXE
  • fsgk32.EXE
  • fsm32.EXE
  • fsma32.EXE
  • fsmb32.EXE
  • f-stopw.EXE
  • F-STOPW.EXE
  • gbmenu.EXE
  • GBMENU.EXE
  • gbpoll.EXE
  • GBPOLL.EXE
  • GENERICS.EXE
  • GUARD.EXE
  • GUARDDOG.EXE
  • HACKTRACERSETUP.EXE
  • HTLOG.EXE
  • HWPE.EXE
  • iamapp.EXE
  • IAMAPP.EXE
  • iamserv.EXE
  • IAMSERV.EXE
  • IAMSTATS.EXE
  • IBMASN.EXE
  • IBMAVSP.EXE
  • ICLOAD95.EXE
  • ICLOADNT.EXE
  • ICMON.EXE
  • ICSUPP95.EXE
  • ICSUPPNT.EXE
  • IFACE.EXE
  • IFW2000.EXE
  • IOMON98.EXE
  • IPARMOR.EXE
  • IRIS.EXE
  • ISRV95.EXE
  • JAMMER.EXE
  • JEDI.EXE
  • KAVLITE40ENG.EXE
  • KAVPERS40ENG.EXE
  • KAVPF.EXE
  • KERIO-PF-213-EN-WIN.EXE
  • KERIO-WRL-421-EN-WIN.EXE
  • KERIO-WRP-421-EN-WIN.EXE
  • KILLPROCESSSETUP161.EXE
  • LDNETMON.EXE
  • LDPRO.EXE
  • LDPROMENU.EXE
  • LDSCAN.EXE
  • LOCALNET.EXE
  • LOCKDOWN.EXE
  • lockdown2000.EXE
  • LOCKDOWN2000.EXE
  • LOOKOUT.EXE
  • LSETUP.EXE
  • LUALL.EXE
  • LUAU.EXE
  • LUCOMSERVER.EXE
  • LUINIT.EXE
  • LUSPT.EXE
  • MCAGENT.EXE
  • MCMNHDLR.EXE
  • Mcshield.EXE
  • MCTOOL.EXE
  • MCUPDATE.EXE
  • MCVSRTE.EXE
  • MCVSSHLD.EXE
  • MFW2EN.EXE
  • MFWENG3.02D30.EXE
  • MGAVRTCL.EXE
  • MGAVRTE.EXE
  • MGHTML.EXE
  • MGUI.EXE
  • MINILOG.EXE
  • Monitor.EXE
  • MONITOR.EXE
  • MOOLIVE.EXE
  • MPFAGENT.EXE
  • MPFSERVICE.EXE
  • MPFTRAY.EXE
  • MRFLUX.EXE
  • MSCONFIG.EXE
  • MSINFO32.EXE
  • MSSMMC32.EXE
  • MU0311AD.EXE
  • MWATCH.EXE
  • N32SCANW.EXE
  • NAV Auto-Protect.NAV80TRY.EXE
  • NAVAP.navapsvc.EXE
  • NAVAPSVC.EXE
  • NAVAPW32.EXE
  • NAVDX.EXE
  • NAVENGNAVEX15.NAVLU32.EXE
  • NAVLU32.EXE
  • NAVNT.EXE
  • NAVSTUB.EXE
  • Navw32.EXE
  • NAVW32.EXE
  • NAVWNT.EXE
  • NC2000.EXE
  • NCINST4.EXE
  • NDD32.EXE
  • NEOMONITOR.EXE
  • NeoWatchLog.EXE
  • NETARMOR.EXE
  • NETINFO.EXE
  • NETMON.EXE
  • NETSCANPRO.EXE
  • NETSPYHUNTER-1.2.EXE
  • NETSTAT.EXE
  • NETUTILS.EXE
  • NISSERV.EXE
  • NISUM.EXE
  • NMAIN.EXE
  • NOD32.EXE
  • NORMIST.EXE
  • NORTON_INTERNET_SECU_3.0_407.EXE
  • notstart.EXE
  • NPF40_TW_98_NT_ME_2K.EXE
  • NPFMESSENGER.EXE
  • NPROTECT.EXE
  • npscheck.EXE
  • NPSSVC.EXE
  • NSCHED32.EXE
  • ntrtscan.EXE
  • NTVDM.EXE
  • NTXconfig.EXE
  • Nui.EXE
  • Nupgrade.EXE
  • NVARCH16.EXE
  • NVC95.EXE
  • nvsvc32.EXE
  • NWINST4.EXE
  • NWService.EXE
  • NWTOOL16.EXE
  • OSTRONET.EXE
  • OUTPOST.EXE
  • OUTPOSTINSTALL.EXE
  • OUTPOSTPROINSTALL.EXE
  • PADMIN.EXE
  • PANIXK.EXE
  • PAVCL.EXE
  • pavproxy.EXE
  • PAVPROXY.EXE
  • PAVSCHED.EXE
  • PAVW.EXE
  • PCC2002S902.EXE
  • PCC2K_76_1436.EXE
  • PCCIOMON.EXE
  • pccntmon.EXE
  • pccwin97.EXE
  • PCCWIN98.EXE
  • PCDSETUP.EXE
  • PCFWALLICON.EXE
  • PCIP10117_0.EXE
  • pcscan.EXE
  • PDSETUP.EXE
  • PERISCOPE.EXE
  • PERSFW.EXE
  • PERSWF.EXE
  • PF2.EXE
  • PFWADMIN.EXE
  • PINGSCAN.EXE
  • PLATIN.EXE
  • POP3TRAP.EXE
  • POPROXY.EXE
  • POPSCAN.EXE
  • PORTDETECTIVE.EXE
  • PORTMONITOR.EXE
  • PPINUPDT.EXE
  • PPTBC.EXE
  • PPVSTOP.EXE
  • PROCESSMONITOR.EXE
  • PROCEXPLORERV1.0.EXE
  • PROGRAMAUDITOR.EXE
  • PROPORT.EXE
  • PROTECTX.EXE
  • PSPF.EXE
  • PURGE.EXE
  • PVIEW95.EXE
  • QCONSOLE.EXE
  • QSERVER.EXE
  • rapapp.EXE
  • RAV7.EXE
  • RAV7WIN.EXE
  • RAV8WIN32ENG.EXE
  • REALMON.EXE
  • REGEDIT.EXE
  • REGEDT32.EXE
  • RESCUE.EXE
  • RESCUE32.EXE
  • RRGUARD.EXE
  • RSHELL.EXE
  • rtvscan.EXE
  • RTVSCN95.EXE
  • RULAUNCH.EXE
  • SAFEWEB.EXE
  • sbserv.EXE
  • SBSERV.EXE
  • SCAN32.EXE
  • SCAN95.EXE
  • SCANPM.EXE
  • SCRSCAN.EXE
  • SD.EXE
  • SERV95.EXE
  • SETUP_FLOWPROTECTOR_US.EXE
  • SETUPVAMEEVAL.EXE
  • SFC.EXE
  • SGSSFW32.EXE
  • SH.EXE
  • SHELLSPYINSTALL.EXE
  • SHN.EXE
  • SMC.EXE
  • SOFI.EXE
  • SPF.EXE
  • Sphinx.EXE
  • SPHINX.EXE
  • SPYXX.EXE
  • SS3EDIT.EXE
  • ST2.EXE
  • SUPFTRL.EXE
  • SUPPORTER5.EXE
  • SWEEP95.EXE
  • SweepNet.SWEEPSRV.SYS.SWNETSUP.EXE
  • SymProxySvc.EXE
  • SYMPROXYSVC.EXE
  • SYMTRAY.EXE
  • SYSEDIT.EXE
  • TASKMON.EXE
  • TAUMON.EXE
  • TBSCAN.EXE
  • TC.EXE
  • TCA.EXE
  • TCM.EXE
  • TDS2-98.EXE
  • TDS2-NT.EXE
  • TDS-3.EXE
  • TFAK.EXE
  • TFAK5.EXE
  • TGBOB.EXE
  • TITANIN.EXE
  • TITANINXP.EXE
  • TRACERT.EXE
  • TRJSCAN.EXE
  • TRJSETUP.EXE
  • TROJANTRAP3.EXE
  • UNDOBOOT.EXE
  • UPDATE.EXE
  • vbcmserv.EXE
  • VBCMSERV.EXE
  • VbCons.EXE
  • VBCONS.EXE
  • VBUST.EXE
  • VBWIN9X.EXE
  • VBWINNTW.EXE
  • VCSETUP.EXE
  • VET32.EXE
  • Vet95.EXE
  • VET95.EXE
  • VetTray.EXE
  • VETTRAY.EXE
  • VFSETUP.EXE
  • VIR-HELP.EXE
  • VIRUSMDPERSONALFIREWALL.EXE
  • VNLAN300.EXE
  • VNPC3000.EXE
  • VPC32.EXE
  • VPC42.EXE
  • VPFW30S.EXE
  • VPTRAY.EXE
  • VSCAN40.EXE
  • VSCENU6.02D30.EXE
  • VSCHED.EXE
  • VSECOMR.EXE
  • vshwin32.EXE
  • VSISETUP.EXE
  • VSMAIN.EXE
  • vsmon.EXE
  • VSMON.EXE
  • VSSTAT.EXE
  • VSWIN9XE.EXE
  • VSWINNTSE.EXE
  • VSWINPERSE.EXE
  • W32DSM89.EXE
  • W9X.EXE
  • WATCHDOG.EXE
  • WEBSCANX.EXE
  • WEBTRAP.EXE
  • WFINDV32.EXE
  • WGFE95.EXE
  • WHOSWATCHINGME.EXE
  • WIMMUN32.EXE
  • WINRECON.EXE
  • WNT.EXE
  • WrAdmin.EXE
  • WRADMIN.EXE
  • WrCtrl.EXE
  • WRCTRL.EXE
  • WSBGATE.EXE
  • WYVERNWORKSFIREWALL.EXE
  • XPF202EN.EXE
  • zapro.EXE
  • ZAPRO.EXE
  • ZAPSETUP3001.EXE
  • ZATUTOR.EXE
  • ZAUINST.EXE
  • ZONALM2601.EXE
  • zonealarm.EXE
  • ZONEALARM.EXE

Information Theft

This worm steals Yahoo Messenger (YM) related information and the Windows product ID. It also steals the CD keys of the following popular game applications:

  • Battlefield 1942
  • Battlefield 1942: Secret Weapons Of WWII
  • Battlefield 1942: The Road To Rome
  • Battlefield 1942: Vietnam
  • Black and White
  • 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

It is able to steal email message information from an infected system via the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
WAB\WAB4\Wab File Name

HKEY_LOCAL_MACHINE\Software\Microsoft\
MessengerService\ListCache\.NET Messenger Service

Other Details

This worm is compressed using FSG.

 
 
 

Analysis by: Michael Tonido


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.322.04

Pattern release date: Dec 28, 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:

Restarting in Safe Mode

� On Windows 95

  1. Restart your computer.
  2. Press F8 at the Starting Windows 95 message.
  3. Choose Safe Mode from the Windows 95 Startup Menu then press Enter.

� On Windows 98 and ME

  1. Restart your computer.
  2. Press the CTRL key until the startup menu appears.
  3. Choose the Safe Mode option then press Enter.

� On Windows NT (VGA mode)

  1. Click Start>Settings>Control Panel.
  2. Double-click the System icon.
  3. Click the Startup/Shutdown tab.
  4. Set the Show List field to 10 seconds and click OK to save this change.
  5. Shut down and restart your computer.
  6. Select VGA mode from the startup menu.

� On Windows 2000

  1. Restart your computer.
  2. Press the F8 key, when you see the Starting Windows bar at the bottom of the screen.
  3. Choose the Safe Mode option from the Windows Advanced Options Menu then press Enter.

� On Windows XP

  1. Restart your computer.
  2. Press F8 after the Power-On Self Test (POST) is done. If the Windows Advanced Options Menu does not appear, try restarting and then pressing F8 several times after the POST screen.
  3. Choose the Safe Mode option from the Windows Advanced Options Menu then press Enter.

Note: After performing all the solutions for the removal of this malware, please restart your system normally, and run your Trend Micro antivirus product.

Removing Autostart Entries/Keys from the Registry

Removing autostart entries/keys 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:
    AIM95 Startup = �aim95.exe�
  4. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>RunOnce
  5. In the right panel, locate and delete the entry:
    AIM95 Startup = �aim95.exe�
  6. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>RunServices
  7. In the right panel, locate and delete the entry:
    AIM95 Startup = �aim95.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:
    AIM95 Startup = �aim95.exe�
  10. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>RunOnce
  11. In the right panel, locate and delete the entry:
    AIM95 Startup = �aim95.exe�
  12. In the left panel, locate and delete the following keys:
    • HKEY_LOCAL_MACHINE>System>CurrentControlSet>
      Enum>Root>LEGACY_ADVANCE_WINDOWS_HOST
    • HKEY_LOCAL_MACHINE>System>CurrentControlSet>
      Services>Advance Windows Host
  13. Close Registry Editor.

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

Deleting Malware File

  1. Right-click Start then click Search� or Find�, depending on the version of Windows you are running.
  2. In the Named input box, type:
    • ADMDLL.DLL
    • EXPIORER.EXE
    • RADDRV.DLL
  3. In the Look In drop-down list, select the drive that contains Windows, then press Enter.
  4. Once located, select the file then press Delete.

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.AEE. 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 on certain platforms. Download and install the critical patches from the following links:




Trend Micro offers best-of-breed antivirus and content-security solutions for your corporate network, small and medium business, mobile device or home PC.