Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

The infected files are detected as PE_FUJACKS.RC. It deletes a file. It drops files in folders as an infection marker. It creates registry entries to disable execution of programs related to antivirus software.

This file infector may be dropped by other malware.

It does not have any backdoor routine.

It does not have any information-stealing capability.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 74,759 bytes
File Type: EXE
File Compression: UPX
Memory Resident: Yes
Initial Samples Received Date: 08 Apr 2009
Payload: Compromises system security, Deletes files

Arrival Details

This file infector may arrive via network shares.

It may be dropped by the following malware:

  • PE_FUJACKS.RC

Installation

This file infector drops the following copies of itself into the affected system:

  • %System%\drivers\Messages.exe
  • %System%\drivers\svchosL.exe
  • %System%\drivers\TXPlatform.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It drops the following files:

  • %System Root%\z1.tmp - detected as TROJ_AGENT.APVU

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It drops the following non-malicious files:

  • %System Root%\z.tmp
  • %System Root%\GK.tmp

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

This file infector adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Explorer = "%System%\drivers\Messages.exe"

Other System Modifications

This file infector modifies the following registry entries to hide files with Hidden attributes:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\Hidden\
SHOWALL
CheckedValue = "0"

(Note: The default value data of the said registry entry is 1.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wscsvc

File Infection

This file infector infects the following file types:

  • .asp
  • .htm
  • .html
  • .exe

Propagation

This file infector drops copies of itself in network drives such as the following:

  • Cool_GameSetup.exe

It uses the following user name and password to gain access to password-protected shares:

  • password
  • harley
  • 123456
  • pussy
  • mustang
  • shadow
  • qwerty
  • baseball
  • letmein
  • 12345678
  • 12345
  • admin
  • 5201314
  • qq520
  • 1234567
  • 123456789
  • 654321
  • 54321
  • 000000
  • 11111111
  • 88888888
  • passwd
  • database
  • abc123
  • sybase
  • 123qwe
  • server
  • computer
  • super
  • 123asd
  • ihavenopass
  • godblessyou
  • enable
  • alpha
  • 111111
  • 121212
  • 123123
  • 1234qwer
  • 123abc
  • patrick
  • administrator
  • fuckyou
  • test123
  • temp123
  • owner
  • login
  • Login
  • pw123
  • mypc123
  • admin123
  • mypass
  • mypass123
  • 901100
  • Administrator
  • Guest
  • admin

Backdoor Routine

This file infector does not have any backdoor routine.

Process Termination

This file infector terminates the following processes if found running in the affected system's memory:

  • safeboxTray.exe
  • 360Safe.exe
  • 360safebox.exe
  • 360tray.exe

Information Theft

This file infector does not have any information-stealing capability.

Other Details

This file infector connects to the following possibly malicious URL:

  • www.{BLOCKED}q.com.{BLOCKED}dmin5.com

However, as of this writing, the said sites are inaccessible.

NOTES:

The infected files are detected as PE_FUJACKS.RC.

It deletes the following file:

  • %System%\drivers\etc\hosts

It drops the following files in folders as an infection marker:

  • Desktop_1.ini
  • Desktop_2.ini

It creates the following registry entries to disable execution of the following programs related to antivirus software:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
Image File Execution Options\{Application}
Debugger = "ntsd -d"

Where {Application} is the following:

  • 360hotfix.exe
  • 360rpt.exe
  • 360safe.exe
  • 360safebox.exe
  • 360tray.exe
  • agentsvr.exe
  • apvxdwin.exe
  • ast.exe
  • avcenter.exe
  • avengine.exe
  • avgnt.exe
  • avguard.exe
  • avltmain.exe
  • avp.exe
  • avp32.exe
  • avtask.exe
  • bdagent.exe
  • bdwizreg.exe
  • boxmod.exe
  • ccapp.exe
  • ccenter.exe
  • ccevtmgr.exe
  • ccregvfy.exe
  • ccsetmgr.exe
  • egui.exe
  • ekrn.exe
  • extdb.exe
  • frameworkservice.exe
  • frwstub.exe
  • guardfield.exe
  • iparmor.exe
  • kaccore.exe
  • kasmain.exe
  • kav32.exe
  • kavstart.exe
  • kavsvc.exe
  • kavsvcui.exe
  • kislnchr.exe
  • kissvc.exe
  • kmailmon.exe
  • knownsvr.exe
  • kpfw32.exe
  • kpfwsvc.exe
  • kregex.exe
  • kvfw.exe
  • kvmonxp.exe
  • kvmonxp.kxp
  • kvol.exe
  • kvprescan.exe
  • kvsrvxp.exe
  • kvwsc.exe
  • kvxp.kxp
  • kwatch.exe
  • livesrv.exe
  • makereport.exe
  • mcagent.exe
  • mcdash.exe
  • mcdetect.exe
  • mcshield.exe
  • mctskshd.exe
  • mcvsescn.exe
  • mcvsshld.exe
  • mghtml.exe
  • naprdmgr.exe
  • navapsvc.exe
  • navapw32.exe
  • navw32.exe
  • nmain.exe
  • nod32.exe
  • nod32krn.exe
  • nod32kui.exe
  • npfmntor.exe
  • oasclnt.exe
  • pavsrv51.exe
  • pfw.exe
  • psctrls.exe
  • psimreal.exe
  • psimsvc.exe
  • qqdoctormain.exe
  • ras.exe
  • ravmon.exe
  • ravmond.exe
  • ravstub.exe
  • ravtask.exe
  • rfwcfg.exe
  • rfwmain.exe
  • rfwproxy.exe
  • rfwsrv.exe
  • rsagent.exe
  • rsmain.exe
  • rsnetsvr.exe
  • rssafety.exe
  • rstray.exe
  • safebank.exe
  • safeboxtray.exe
  • scan32.exe
  • scanfrm.exe
  • sched.exe
  • seccenter.exe
  • secnotifier.exe
  • SetupLD.exe
  • shstat.exe
  • smartup.exe
  • sndsrvc.exe
  • spbbcsvc.exe
  • symlcsvc.exe
  • tbmon.exe
  • uihost.exe
  • ulibcfg.exe
  • updaterui.exe
  • uplive.exe
  • vcr32.exe
  • vcrmon.exe
  • vptray.exe
  • vsserv.exe
  • vstskmgr.exe
  • vstskmgr.exe
  • webproxy.exe
  • xcommsvr.exe
  • xnlscn.exe

It does not exploit any vulnerability.

It does not have rootkit capabilities

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 5.883.00
VSAPI OPR PATTERN Date: 08 Apr 2009

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove the malware/grayware file that dropped/downloaded PE_FUJACKS.DC-O

Step 3

Remove malware files dropped/downloaded by PE_FUJACKS.DC-O

  • TROJ_AGENT.APVU

Step 4

Identify and terminate files detected as PE_FUJACKS.DC-O

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 5

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Explorer = %System%\drivers\Messages.exe

Step 6

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
    • {Application}

Step 7

Restore this modified registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
    • From: CheckedValue = 0
      To: CheckedValue = 1

Step 8

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
  • Desktop_1.ini
  • Desktop_2.ini
  • %System Root%\z.tmp
  • %System Root%\GK.tmp

Step 9

Scan your computer with your Trend Micro product to delete files detected as PE_FUJACKS.DC-O. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 10

Restore this deleted registry key/value from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
    • wscsvc

NOTES:

{Application} in Step 5 refers to the antivirus software identified in the Technical Details.


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