Analysis by: Joselyn Canuela
ALIASES:

Trojan.MalPack (Malwarebytes), Trojan:Win32/Lodbak.gen!lnk (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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.

It uses a user interface (UI).

  TECHNICAL DETAILS

File Size: 7,808,654 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 12 Jan 2017
Payload: Drops files

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 files:

  • %Malware Path%\{Blank hidden folder}\desktop.ini
  • %Malware Path%\{Blank hidden folder}\IndexerVolumeGuid
  • %Malware Path%\AHMED (16GB).lnk -> shortcut that executes the dropped DLL
  • %Malware Path%\System Volume Information\IndexerVolumeGuid
  • %Malware Path%\System Volume Information\WPSettings.dat

It drops and executes the following files:

  • %Malware Path%\{Blank hidden folder}\{Random DLL name}.1 -> detected as WORM_GAMARUE.YYJC

It creates the following folders:

  • %Malware Path%\{Blank hidden folder}
  • %Malware Path%\System Volume Information

Other Details

This Trojan uses the following user interface:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.426.05
FIRST VSAPI PATTERN DATE: 24 May 2017
VSAPI OPR PATTERN File: 13.427.00
VSAPI OPR PATTERN Date: 25 May 2017

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove malware/grayware files dropped/downloaded by TROJ_LODBAK.BA. (Note: Please skip this step if the threats listed below have already been removed.)

    • WORM_GAMARUE.YYJC

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.
  • %Malware Path%\{Blank hidden folder}
  • %Malware Path%\System Volume Information

Step 5

Search and delete this file

[ Learn More ]
There may be some 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.  
  • %Malware Path%\AHMED (16GB).lnk

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_LODBAK.BA. 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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