Niknat is a simple Word Macro virus. It creates a hidden directory called C:\EvaHzg2 and writes a batch file into it. This batch creates a bitmap file (Evah.bmp) by using debug.exe from DOS.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Niknat activates on 23rd of October. Then the virus manipulates the registry in order to change the active Wallpaper to a new one. This new Wallpaper is the previously creates Evah.bmp which contains a picture of a naked girl.
Niknat contains the 6 macros:
Evahzg AutoClose ToolsMacro FileTemplates TCloseAN DCloseAN
Any attempt to use Tools/Macro or File/Templates menu causes the computer's speaker beep while a message box with this text appears on the screen:
Windows Protection Error
The virus body contains the following text which is never displayed:
by NAENBGOURSG SO.HT.AI.KS 231076-GREECE Thanks to NEURO VRD 19-4-1997 VRP A.U.A
Technical Details: Katrin Tocheva, Peter Szor and Urmas Rahu, F-Secure, 1997