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Threat Encyclopedia

BKDR_SHIZ.TO

ANALYSIS BY

Andrei Castillo


ALIASES:

Trojan horse PSW.Agent.BDPV(AVG), W32/Dofoil.QTZ!tr(Fortinet), Win32/Spy.Shiz.NCM trojan(NOD32), Trojan.Win32.Dofoil.sd (v)(Sunbelt), TR/Spy.Shiz.NCM(Antivir)

PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type:Backdoor

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

9.700

VSAPI OPR PATTERN File:

10.393.00

VSAPI OPR PATTERN Date:

05 Nov 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and delete files detected as BKDR_SHIZ.TO using the Recovery Console

[ Learn More ]

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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.
  • %User Temp%\{random number}.tmp
  • %Application Data%\ipusy{random 3 letters}

Step 5

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 NT\CurrentVersion\Winlogon
    • From: Userinit = "C:\Windows\system32\userinit.exe, %All Users Profile%\Application Data\{malware name}.exe,"
      To: Userinit = "C:\Windows\system32\userinit.exe,"


Step 6

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\Internet Settings
    • GlobalUserOffline = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography
    • B0B2D6E3 = "{random binary value}"

Step 7

Delete the Scheduled Tasks added by this malware/grayware

[ Learn More ]

To delete the added Scheduled Task file:

  1. Open the Windows Scheduled Tasks. To do this:
    • On Windows 2000, XP, and Server 2003:
      Click on Start>Programs>Accessories>System Tools>Scheduled Tasks
    • On Windows Vista and 7:
      Click Start>All Programs>Accessories>System Tools>Task Scheduler
  2. Double-click on a .JOB file.
  3. Check if the malware path and file name exists in the job file. To do this:
    • On Windows 2000, XP, and Server 2003:
      Check the value in the Run field
    • On Windows Vista and 7:
      Find the malware path and file name in the Details column of the Action tab
  4. If the above conditions are true, select the .JOB file then press SHIFT+DELETE to permanently delete the file.
  5. Repeat the steps above for the remaining .JOB files.

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_SHIZ.TO. 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.

NOTES:

To unhide the scheduled task, do the following:

  1. Go to command prompt: Start>Run. Type: cmd and press Enter.
  2. Change working directory to Scheduled task directory: Type cd C:\WINDOWS\Tasks and press Enter.
  3. Change file attribute to unhide the file: Type attrib -h nVidiaBootAgent32.job and press Enter.


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