ALIASES:

Trojan:Win32/Malat (Microsoft); W32/Autorun.worm.bc (McAfee); Trojan Horse (Symantec); Worm.Win32.Small.ag (Kaspersky); Trojan.Win32.Generic!SB.0 (Sunbelt); Worm.Generic.364401 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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: 11,264 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 25 Apr 2012

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 the following copies of itself into the affected system:

  • %Windows%\system234.exe
  • %Temp%\mexica.exe
  • a:\imagenes.exe
  • %System Root%\imagenes.exe
  • d:\imagenes.exe

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

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

Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.AEV. 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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