PE_LOOKED.AL

October 10, 2012
 ALIASES:

Virus:Win32/Viking.R, Virus:Win32/Viking.R (Microsoft); W32/HLLP.Philis.ao (McAfee); W32.Looked.O (Symantec); PAK:UPack, Worm.Win32.Viking.r (Kaspersky); Win32.Looked.P (v) (Sunbelt); Win32.Worm.Viking.R (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This file infector 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:

502,976 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Sep 2012

Arrival Details

This file infector 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 file infector drops the following copies of itself into the affected system:

  • \192.168.100.1\admin$\{malware file name}
  • \192.168.100.2\admin$\{malware file name}

Other System Modifications

This file infector modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Windows
load = "%Windows%\rundl132.exe"

Dropping Routine

This file infector drops the following files:

  • %Windows%\rundl132.exe
  • %System Root%\_desktop.ini
  • %Program Files%\_desktop.ini
  • %Program Files%\Adobe\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\Esl\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\Reader\_desktop.ini
  • %System Root%\viDll.dll

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restore this modified 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\Microsoft\Windows NT\CurrentVersion\Windows
    • load = "%Windows%\rundl132.exe"

Step 3

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.
  • %Windows%\rundl132.exe
  • %System Root%\_desktop.ini
  • %Program Files%\_desktop.ini
  • %Program Files%\Adobe\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\Esl\_desktop.ini
  • %Program Files%\Adobe\Reader 10.0\Reader\_desktop.ini
  • %System Root%\viDll.dll

Step 4

Scan your computer with your Trend Micro product to clean files detected as PE_LOOKED.AL. 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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