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TROJ_AGENT.ATLA

October 28, 2010
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats. It accesses websites to download files. This action allows this malware to possibly add other malware on the affected computer.



  TECHNICAL DETAILS

File Size:

36864 bytes

Memory Resident:

Yes


Other System Modifications


This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\InterVideo\
Types
International = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\InterVideo\
Types
ver = "0"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = "8a4a1b76-c72a-4bf5-bc32-05fbb09f4ea1.exe"



Download Routine


This Trojan connects to the following malicious URLs:

  • http://{BLOCKED}olbar.net/inetcreative/default/kbmsgver7.ini


It accesses websites to download the following files:

  • %System%\KBMSGVER7.INI

(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.)


  SOLUTION

Minimum Scan Engine:

8.900


Step 1


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_LOCAL_MACHINE\SOFTWARE\InterVideo\Types
    • International = 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\InterVideo\Types
    • ver = 0
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
    • Taskman = 8a4a1b76-c72a-4bf5-bc32-05fbb09f4ea1.exe


Step 2


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. %System%\KBMSGVER7.INI


Step 3


Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.ATLA 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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