Threat Description

Pesan

Details

Category: Malware
Platform: W32
Aliases: Pesan

Summary


WordMacro/Pesan.A is a simple Word Macro virus.

It activates every five minutes and displays one of these messages:

MicroSoft Warning!!!   You are about Formatting Hardisk, Are you sure?   FORMAT WARNING !!!   You have just activate the format.exe trigger,   all command will FORMAT your hardisk   SYSTEM DAMAGE WARNING !!!   System detected 'Bandung.d_t' VIRUS, all system will be   Damage Permanently !!! May God Have Mercy On you ....!!!  

Otherwise Pesan.A only spreads.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.



Technical Details



Variant:Pesan.B

This is a later variant with destructive activation routine. The virus does not display any messages, but it attempts to delete the following files:

c:\dos\chkdsk.exe         c:\dos\format.com         c:\dos\defrag.exe         c:\dos\scandisk.exe         c:\msdos\chkdsk.exe         c:\msdos\format.com         c:\msdos\defrag.exe         c:\msdos\scandisk.exe  

After this Pesan.B creates a BAT file with the same name. When this batch file is executed, it will delete all files from drive C: with the deltree command.

The activation routine failes if there is no c:\dos or c:\msdos directory (most Windows 95 and NT systems do not have such directories).





Description Details: Mikko Hypponen, F-Secure


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