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WORM_GAMARUE.ITK

March 28, 2013
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

Backdoor.Trojan (Symantec), Troj/Loader-M (Sophos), Win32/Bundpil.J worm (ESET)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This worm 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:

4,096 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

20 Mar 2013

Arrival Details

This worm 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 worm drops and executes the following files:

  • %System Root%\TEMP\TrustedInstaller.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Download Routine

This worm connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}cocklameavindustry.in

It saves the files it downloads using the following names:

  • {malware path}:\Thumbs.db