ALS_BURSTED.EP

August 29, 2013
 Analysis by: Alvin Bacani
 ALIASES:

Virus.Acad.Bursted.b (Kasperksy); ALS/Bursted (McAfee)

 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:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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:

8,318 bytes

File Type:

LSP

Memory Resident:

No

Initial Samples Received Date:

12 Oct 2012

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.

NOTES:
This malware arrives in the system as an AutoLISP script bundled with a drawing file (DWG).

It searches for the file base.dcl and acad.lsp in the AutoCAD search path to locate AutoCAD's current working folder.

It drops a copy of itself in AutoCAD's current working folder as acad.LSP. Once a new drawing file is opened, the dropped copy is automatically loaded and executed.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.164.03

FIRST VSAPI PATTERN DATE:

17 Jul 2013

VSAPI OPR PATTERN File:

10.165.00

VSAPI OPR PATTERN Date:

17 Jul 2013

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

Scan your computer with your Trend Micro product to delete files detected as ALS_BURSTED.EP. 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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