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TROJ_LLAC.WLI

April 11, 2014
 ALIASES:

Trojan:Win32/Msposer.A (Microsoft); RDN/PWS-Banker.dldr!g (McAfee); Trojan.Win32.Cossta.abuz (Kaspersky); Mal/VB-YZ (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Banload2.HZO.dropper (AVG)

 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:

44,032 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

11 Apr 2014

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 creates the following folders:

  • %User Profile%\appinf

(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.)

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\appinf\sk1.txt
  • %User Profile%\appinf\sk101.txt
  • %User Profile%\appinf\sk103.txt
  • %User Profile%\appinf\sk104.txt
  • %User Profile%\appinf\sk105.txt
  • %User Profile%\appinf\sk107.txt
  • %User Profile%\appinf\sk108.txt
  • %User Profile%\appinf\sk115.txt
  • %User Profile%\appinf\sk117.txt
  • %User Profile%\appinf\sk119.txt
  • %User Profile%\appinf\sk120.txt
  • %User Profile%\appinf\sk121.txt
  • %User Profile%\appinf\sk123.txt
  • %User Startup%\documento2.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.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

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

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.
  • %User Profile%\appinf\sk1.txt
  • %User Profile%\appinf\sk101.txt
  • %User Profile%\appinf\sk103.txt
  • %User Profile%\appinf\sk104.txt
  • %User Profile%\appinf\sk105.txt
  • %User Profile%\appinf\sk107.txt
  • %User Profile%\appinf\sk108.txt
  • %User Profile%\appinf\sk115.txt
  • %User Profile%\appinf\sk117.txt
  • %User Profile%\appinf\sk119.txt
  • %User Profile%\appinf\sk120.txt
  • %User Profile%\appinf\sk121.txt
  • %User Profile%\appinf\sk123.txt
  • %User Startup%\documento2.exe

Step 3

Search and delete this folder

[ 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.
  • %User Profile%\appinf

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_LLAC.WLI. 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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