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ACM_BURSTED.BF

October 09, 2012
 ALIASES:

ALS.Bursted.B (Symantec); Virus.Acad.Bursted.b (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This malware infects by way of the user opening a certain infected file. It searches for a legitimate file in the affected system and modifies it.

This Trojan does not have any propagation routine.

It does not have any backdoor routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size:

6,595 bytes

File Type:

LSP

Memory Resident:

No

Initial Samples Received Date:

08 Mar 2011

Payload:

Modifies files

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:
It arrives by opening an infected acad.lsp file. Upon execution, it searches and reads the file acad.lsp and looks for the string "ddcopy.lsp" in it. If it did not find the said string, it adds the following line to acad.lsp:

  • load "ddcopy.lsp"

It will then overwrite the contents of the file ddcopy.lsp with the contents of the modified acad.lsp file.

It also checks if the file name of the opened drawing file is "Drawing.dwg". If it is not, it overwrites the contents of the file acad.lsp with the contents of ddcopy.lsp.

This malware does not have rootkit capabilities.

This malware does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.886.07

FIRST VSAPI PATTERN DATE:

08 Mar 2011

VSAPI OPR PATTERN File:

8.197.00

VSAPI OPR PATTERN Date:

02 Jun 2011

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 ACM_BURSTED.BF. 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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