arrow_back
search
close

TROJ_ZLOB.FNA

October 08, 2012
 Analysis by: Kathleen Notario
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  TECHNICAL DETAILS

File Size:

Varies

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 Aug 2010

Payload:

Drops files

Installation

This Trojan adds the following folders:

  • %Start Menu%\¼«EUµÇEO
  • %Program Files%\¼«EUµÇEO

(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\.knl

HKEY_CLASSES_ROOT\.qa

HKEY_CLASSES_ROOT\.rrls

HKEY_CLASSES_ROOT\qafile

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\PropertySystem\
PropertyHandlers\.rrls

HKEY_CLASSES_ROOT\ATLDownLoadProgressBar.DownLoadProgressBar

HKEY_CLASSES_ROOT\ATLDownLoadProgressBar.DownLoadProgressBar.1

HKEY_CLASSES_ROOT\Downloader.DLoader

HKEY_CLASSES_ROOT\Downloader.DLoader.1

HKEY_CLASSES_ROOT\KOOPLAYER.CCTVPlayerCtrl.1

HKEY_CLASSES_ROOT\SOPOCX.SopCoreCtrl.1

HKEY_CLASSES_ROOT\ULIVECTRL.ULiveCtrlCtrl.1

HKEY_CLASSES_ROOT\UPLAYER.UPlayerCtrl.1

HKEY_CLASSES_ROOT\CLSID\{070CA17A-4BD2-4612-83B4-32B1B9159B48}

HKEY_CLASSES_ROOT\CLSID\{38943A5A-33BB-4D28-909A-BF52B994D26A}

HKEY_CLASSES_ROOT\CLSID\{78ABDC59-D8E7-44D3-9A76-9A0918C52B4A}

HKEY_CLASSES_ROOT\CLSID\{8E2D6F68-E69E-426E-8F5E-A14D7BF3C3CD}

HKEY_CLASSES_ROOT\CLSID\{8FEFF364-6A5F-4966-A917-A3AC28411659}

HKEY_CLASSES_ROOT\CLSID\{945E37E3-156F-4757-AA1F-CBA338DDFBE9}

HKEY_CLASSES_ROOT\CLSID\{AC414988-E5BB-4C2C-873B-EA53D2F3D23A}

HKEY_CLASSES_ROOT\CLSID\{C728DAB8-FDF5-4CD7-89DD-879D25794C77}

HKEY_CLASSES_ROOT\CLSID\{EAB7A1CC-C77B-45E5-9AC2-AD037D047BCC}

HKEY_CLASSES_ROOT\Interface\{042C7AAC-BD4A-4450-AA0C-AAC3A30CA19E}

HKEY_CLASSES_ROOT\Interface\{3D593BD9-ADCB-4E50-B1D3-9B8B413148FF}

HKEY_CLASSES_ROOT\Interface\{6B1C04D4-FE66-4828-92E0-EEBCC8959BF3}

HKEY_CLASSES_ROOT\Interface\{770B88B4-DCD8-4857-8E82-62C650F58545}

HKEY_CLASSES_ROOT\Interface\{7AA7A8C8-6BA1-4F68-BB44-CA01D82830FB}

HKEY_CLASSES_ROOT\Interface\{80F1D1E4-9D20-4501-B0F1-196A6B302060}

HKEY_CLASSES_ROOT\Interface\{BE61BB61-0E51-4080-8B6D-8F1FE00ABE38}

HKEY_CLASSES_ROOT\Interface\{C55E048A-B88B-4B9E-974F-0777AAAB4C48}

HKEY_CLASSES_ROOT\Interface\{E9536BC6-75F4-4CC7-A0AC-56A366BB9D12}

HKEY_CLASSES_ROOT\Interface\{EC161D49-0007-47E2-8741-2C0BB6CF3893}

HKEY_CLASSES_ROOT\Interface\{EC28B75D-96D9-4C94-AF51-097924C54C99}

HKEY_CLASSES_ROOT\TypeLib\{0179B775-DF94-4BF5-8EF6-63BE876D1845}

HKEY_CLASSES_ROOT\TypeLib\{18F64ED3-F6C9-456D-B642-7B5D7142781E}

HKEY_CLASSES_ROOT\TypeLib\{754EFA30-C752-4F45-8890-6250A53FD512}

HKEY_CLASSES_ROOT\TypeLib\{7B0F8D4E-2C8D-4F2A-805B-0E35BF90B713}

HKEY_CLASSES_ROOT\TypeLib\{8A6847C0-D132-4FDC-A667-7751C0075A0E}

HKEY_CLASSES_ROOT\TypeLib\{8DB3A21B-4F5A-4D45-AE1A-0F03E72A6E8F}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\App Paths\
jisutv.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
¼«ËÙµçÊÓ

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer
NoInternetIcon = 1

Dropping Routine

This Trojan drops the following files:

  • %Program Files%\NetMeeting\360se.knl
  • %Program Files%\NetMeeting\tao.ico
  • %Desktop%\ÔÚÏßµçÓ°µçÊÓ.lnk

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.)

Other Details

Based on analysis of the codes, it has the following capabilities:

  • It searches for *.lnk files and replaces them with {filename}.qa

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.388.10

VSAPI PATTERN Date:

16 Aug 2010

VSAPI PATTERN Date:

8/16/2010 12:00:00 AM

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

Restart in Safe Mode

[ Learn More ]

Step 3

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_CLASSES_ROOT
    • .knl
  • In HKEY_CLASSES_ROOT
    • .qa
  • In HKEY_CLASSES_ROOT
    • .rrls
  • In HKEY_CLASSES_ROOT
    • qafile
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers
    • .rrls
  • In HKEY_CLASSES_ROOT
    • ATLDownLoadProgressBar.DownLoadProgressBar
  • In HKEY_CLASSES_ROOT
    • ATLDownLoadProgressBar.DownLoadProgressBar.1
  • In HKEY_CLASSES_ROOT
    • Downloader.DLoader
  • In HKEY_CLASSES_ROOT
    • Downloader.DLoader.1
  • In HKEY_CLASSES_ROOT
    • KOOPLAYER.CCTVPlayerCtrl.1
  • In HKEY_CLASSES_ROOT
    • SOPOCX.SopCoreCtrl.1
  • In HKEY_CLASSES_ROOT
    • ULIVECTRL.ULiveCtrlCtrl.1
  • In HKEY_CLASSES_ROOT
    • UPLAYER.UPlayerCtrl.1
  • In HKEY_CLASSES_ROOT\CLSID
    • {070CA17A-4BD2-4612-83B4-32B1B9159B48}
  • In HKEY_CLASSES_ROOT\CLSID
    • {38943A5A-33BB-4D28-909A-BF52B994D26A}
  • In HKEY_CLASSES_ROOT\CLSID
    • {78ABDC59-D8E7-44D3-9A76-9A0918C52B4A}
  • In HKEY_CLASSES_ROOT\CLSID
    • {8E2D6F68-E69E-426E-8F5E-A14D7BF3C3CD}
  • In HKEY_CLASSES_ROOT\CLSID
    • {8FEFF364-6A5F-4966-A917-A3AC28411659}
  • In HKEY_CLASSES_ROOT\CLSID
    • {945E37E3-156F-4757-AA1F-CBA338DDFBE9}
  • In HKEY_CLASSES_ROOT\CLSID
    • {AC414988-E5BB-4C2C-873B-EA53D2F3D23A}
  • In HKEY_CLASSES_ROOT\CLSID
    • {C728DAB8-FDF5-4CD7-89DD-879D25794C77}
  • In HKEY_CLASSES_ROOT\CLSID
    • {EAB7A1CC-C77B-45E5-9AC2-AD037D047BCC}
  • In HKEY_CLASSES_ROOT\Interface
    • {042C7AAC-BD4A-4450-AA0C-AAC3A30CA19E}
  • In HKEY_CLASSES_ROOT\Interface
    • {3D593BD9-ADCB-4E50-B1D3-9B8B413148FF}
  • In HKEY_CLASSES_ROOT\Interface
    • {6B1C04D4-FE66-4828-92E0-EEBCC8959BF3}
  • In HKEY_CLASSES_ROOT\Interface
    • {770B88B4-DCD8-4857-8E82-62C650F58545}
  • In HKEY_CLASSES_ROOT\Interface
    • {7AA7A8C8-6BA1-4F68-BB44-CA01D82830FB}
  • In HKEY_CLASSES_ROOT\Interface
    • {80F1D1E4-9D20-4501-B0F1-196A6B302060}
  • In HKEY_CLASSES_ROOT\Interface
    • {BE61BB61-0E51-4080-8B6D-8F1FE00ABE38}
  • In HKEY_CLASSES_ROOT\Interface
    • {C55E048A-B88B-4B9E-974F-0777AAAB4C48}
  • In HKEY_CLASSES_ROOT\Interface
    • {E9536BC6-75F4-4CC7-A0AC-56A366BB9D12}
  • In HKEY_CLASSES_ROOT\Interface
    • {EC161D49-0007-47E2-8741-2C0BB6CF3893}
  • In HKEY_CLASSES_ROOT\Interface
    • {EC28B75D-96D9-4C94-AF51-097924C54C99}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {0179B775-DF94-4BF5-8EF6-63BE876D1845}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {18F64ED3-F6C9-456D-B642-7B5D7142781E}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {754EFA30-C752-4F45-8890-6250A53FD512}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {7B0F8D4E-2C8D-4F2A-805B-0E35BF90B713}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {8A6847C0-D132-4FDC-A667-7751C0075A0E}
  • In HKEY_CLASSES_ROOT\TypeLib
    • {8DB3A21B-4F5A-4D45-AE1A-0F03E72A6E8F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths
    • jisutv.exe
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • ¼«ËÙµçÊÓ

Step 4

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\Policies\Explorer
    • NoInternetIcon=1

Step 5

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. DATA_GENERIC
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
  • Once located, select the file then press SHIFT+DELETE to permanently delete the file.
  • Repeat the said steps for all files listed.

    • Step 6

    Search and delete these folders

    [ Learn More ]
    Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

    • %Start Menu%\¼«EUµÇEO
    • %Program Files%\¼«EUµÇEO

    Step 7

    Scan your computer with your Trend Micro product to delete files detected as TROJ_ZLOB.FNA. 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.


    Did this description help? Tell us how we did.