Threat Description

ColdApe

Details

Category: Malware
Type: Virus
Platform: W97M
Aliases: ColdApe, Happy, AVM

Summary


This is a Word 97 macro virus which drops a Windows script virus.



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


W97M/ColdApe infects documents when they are closed. The virus uses a new method of replicating: instead of using traditional methods of copying it's macros around, it uses a new technique called "AddFromString". This made the virus undetectable by several heuristic scanners.

If the virus is run under Windows 98 or Windows 2000 (NT 5) or under any Windows version running WSH (Windows Scripting Host), the virus can drop these Windows script files:

     A4.VBS to the root directory         Happy.VBS to the root directory         AVM.VBS to the Windows directory  

A4.VBS is not a virus. If this script is executed, it will send an e-mail message using Outlook (if present). The message is directed to a well-known person in the anti-virus industry.

Happy.VBS and AVM.VBS contain the script virus. This appending script virus will infect all .VBS files in these directories:

     C:\         C:\WINDOWS         C:\WINDOWS\DESKTOP         C:\MY DOCUMENTS         C:\STARTUP  

The script virus is independent of the Word Macro virus and will continue to spread even if the macro virus is disinfected.


Variant:ColdApe.B (Love Monkey)

This variant is polymorphic. This is done by prepending the current user's name, the system date and time to the end of the virus macro.

Otherwise this version is very similar to the original one.





Technical Details:Katrin Tocheva & Mikko Hypponen, F-Secure


SUBMIT A SAMPLE

Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Learn More