Threat Description

HPS

Details

Category: Malware
Type: Virus
Platform: W32
Aliases: HPS, Hanta

Summary


HPS is a polymorphic Windows 95 virus which contains this text:

Hantavirus Pulmonary Syndrome (HPS) Virus BioCoded by GriYo / 29A 


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


HPS stays active in memory and infects Win32 EXE files as they are accessed, encrypting its own code with variable polymorphic encryption layer.

HPS activates on Saturdays. If a non-compressed Windows bitmap (BMP) file has been opened, the virus horizontally flips the picture. HPS patches the value DEADBABE (in hex) to the end of the bitmap header area to avoid flipping the same image again. Since non-compressed bitmap files are frequently used by Windows 95 and 98, this causes all kinds of weird effects - such as the start-up and power-down screen of Windows being "mirrorized".

See also: Marburg





Technical Details:Peter Szor, F-Secure, 1997


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