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Virus:ALisp/Passdoc.A


Virus:ALisp/Passdoc.A is an AutoLISP script virus that targets installations of Autocad software.


What to do now

To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.

Threat behavior

Virus:ALisp/Passdoc.A is an AutoLISP script virus that targets installations of Autocad software.
 
It arrives on a user's computer with the name "acaddoc.lsp", usually along with infected Autocad projects. It is automatically executed when an Autocad drawing file is opened.
 
When run it performs the following actions:
 
  • copies itself to all .mnl files in the folder containing the "acad.mnl" file
  • copies itself to all .lsp files in the subfolder "support" whose parent folder contains the "acad.exe" file
 
Analysis by Marian Radu

Symptoms

System changes
The following system changes may indicate the presence of this malware:
  • The presence of the following file:
    acaddoc.lsp

Prevention


Alert level: Severe
First detected by definition: 1.45.1352.0
Latest detected by definition: 1.117.2303.0 and higher
First detected on: Nov 03, 2008
This entry was first published on: May 07, 2010
This entry was updated on: Apr 17, 2011

This threat is also detected as:
  • Virus.ALS.Pasdoc.a (Kaspersky)
  • ACAD/Bursted.B (AVG)
  • ACAD/Bursted.B.1 (Avira)
  • ACAD.Pasdoc (Dr.Web)
  • ALS/Pasdoc.A (ESET)
  • Virus.ALS.Pasdoc (Ikarus)
  • ALS/Bursted (McAfee)
  • ACAD/Bursted.I (Panda)
  • AL/Billy-A (Sophos)
  • ALS.Bursted.B (Symantec)
  • ACM_BURSTED.AV (Trend Micro)