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ALS_BURSTED.MJTB

July 30, 2014
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Virus.Acad.Bursted.b (Kaspersky), Virus:ALisp/Bursted.DG (Microsoft), ACAD/Bursted.L (AntiVir), Trojan.ACAD.Bursted.N (BitDefender), AL/Bursted-AJ (Sophos)

 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:

  • In the wild: Yes

  OVERVIEW


This Trojan may arrive bundled with malware packages as a malware component. It 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:

56,798 bytes

File Type:

LSP

Initial Samples Received Date:

22 Jul 2014

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

It 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 AutoCAD drawing file (.DWG). Once the drawing file is opened, AutoCAD then loads and executes this malware.

It will saves the opened .DWG file if its name is Drawing1.dwg.

It first searches for the file, BASE.DCL to locate AutoCAD Support directory. It searches for the opened DWG file to locate AutoCADs current working folder.

It replicates by creating copies of itself in AutoCAD Support directory, using the following file name:

  • ACADAPPP.LSP

It modifies the following files if a certain condition is met:

  • ACADAPP.lsp
  • ACAD.mnl

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.940.04

FIRST VSAPI PATTERN DATE:

23 Jul 2014

VSAPI OPR PATTERN File:

10.941.00

VSAPI OPR PATTERN Date:

23 Jul 2014

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

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