HT_MOONLIGHT_BK082F91.TOMC

September 07, 2013
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

169,984 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

07 Sep 2013

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Profile%\O86068Z\service.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It creates the following folders:

  • %Windows%\M81151
  • %User Profile%\Templates\O86068Z
  • %System%\X73557go

(Note: %Windows% is the Windows folder, which is usually C:\Windows.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu\version

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang

It adds the following registry entries:

HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
untukmu\version
me = "4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
1 = "M81151"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
2 = "O86068Z"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\Path
3 = "X73557go"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
1 = "5321e"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
2 = "12e62"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
3 = "d3bd5"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
4 = "2b7df"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
TUX\biang
5 = "51315"

Dropping Routine

This Trojan drops the following files:

  • \msvbvm60.dll
  • %System%\msvbvm60.dll
  • %User Profile%\O86068Z\winlogon.exe
  • %Windows%\M81151\EmangEloh.exe
  • %Windows%\M81151\smss.exe
  • %System%\X73557go\Z340510cie.cmd
  • %Windows%\sa-077410.exe
  • %Windows%\Ti867285ta.exe
  • %Windows%\M81151\Ja178143bLay.com
  • %System%\340510867285l.exe
  • %User Startup%\sql.cmd
  • %User Profile%\O86068Z\TuxO86068Z.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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_CURRENT_USER\Software\VB and VBA Program Settings\untukmu
    • version
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX
    • Path
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX
    • biang

Step 3

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\VB and VBA Program Settings\untukmu\version
    • me = "4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
    • 1 = "M81151"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
    • 2 = "O86068Z"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\Path
    • 3 = "X73557go"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
    • 1 = "5321e"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
    • 2 = "12e62"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
    • 3 = "d3bd5"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
    • 4 = "2b7df"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TUX\biang
    • 5 = "51315"

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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.
  • \msvbvm60.dll
  • %System%\msvbvm60.dll
  • %User Profile%\O86068Z\winlogon.exe
  • %Windows%\M81151\EmangEloh.exe
  • %Windows%\M81151\smss.exe
  • %System%\X73557go\Z340510cie.cmd
  • %Windows%\sa-077410.exe
  • %Windows%\Ti867285ta.exe
  • %Windows%\M81151\Ja178143bLay.com
  • %System%\340510867285l.exe
  • %User Startup%\sql.cmd
  • %User Profile%\O86068Z\TuxO86068Z.exe

Step 5

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.
  • %Windows%\M81151
  • %User Profile%\Templates\O86068Z
  • %System%\X73557go

Step 6

Scan your computer with your Trend Micro product to delete files detected as HT_MOONLIGHT_BK082F91.TOMC. 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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