Analysis by: Roland Dela Paz
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This worm arrives via removable drives.

It adds registry entries to enable its automatic execution at every system startup.

It drops copies of itself into all the removable drives connected to an affected system. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size: 130,048 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 02 Nov 2010

Arrival Details

This worm arrives via removable drives.

Installation

This worm drops the following non-malicious files:

  • %System Root%\OGa\RD\DesKTop.ini

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

It drops the following copies of itself into the affected system:

  • %System Root%\OGa\RD\GOx.exe

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

It creates the following folders:

  • %System Root%\OGa
  • %System Root%\OGa\RD

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

It injects codes into the following process(es):

  • EXPLORER.EXE

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{RTR67UT6-45YJ-VGTY654Y5-556HRGTSVG55H8}øò€æÕÌÌÙ€òÅÃÏÄÅā
StubPath = %System Root%\OGa\RD\GOx.exe

Other System Modifications

This worm adds the following registry keys as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{RTR67UT6-45YJ-VGTY654Y5-556HRGTSVG55H8}øò€æÕÌÌÙ€òÅÃÏÄÅā

Propagation

This worm creates the following folders in all removable drives:

  • OGa
  • OGa\RD

It drops copies of itself into all the removable drives connected to an affected system.

It drops the following copy(ies) of itself in all removable drives:

  • OGa\RD\GOx.exe

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

[autorun]
open=OGa\RD\GOx.exe
;{garbage}

;Fuck U Motha Fucka I Could have been ur Dad but the man who fucked ur mom had more change than me.
action=Open folder to view files
shell\open=Open
shell\open\command=OGa\RD\GOx.exe
shell\open\default=1

Backdoor Routine

This worm connects to the following websites to send and receive information:

  • {BLOCKED}0.{BLOCKED}tak.eu
  • {BLOCKED}n3.{BLOCKED}o-saur.com
  • {BLOCKED}0.{BLOCKED}eip.net

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.588.10
VSAPI PATTERN Date: 02 Nov 2010
VSAPI PATTERN Date: 11/2/2010 12:00:00 AM

Step 1

For Windows ME and XP 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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\
    • {RTR67UT6-45YJ-VGTY654Y5-556HRGTSVG55H8}øò€æÕÌÌÙ€òÅÃÏÄÅā

Step 4

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.
  • %System Root%\OGa
  • {Removable Drive}:\OGa

    • Step 5

    Search and delete AUTORUN.INF files created by WORM_IRCBOT.ODH that contain these strings

    [ Learn More ]

    [autorun]
    open=OGa\RD\GOx.exe
    ;{garbage}

    ;Fuck U Motha Fucka  I Could have been ur Dad but the man who fucked ur mom had more change than me.
    action=Open folder to view files
    shell\open=Open
    shell\open\command=OGa\RD\GOx.exe
    shell\open\default=1

    Step 6

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


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