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Details
UpDown.881
It is not a dangerous memory resident encrypted parasitic virus. It hooks INT 15h, 21h and writes itself to the end of EXE files that are executed. While infecting a file the virus appends a data of random length to the end of file.
By hooking INT 15h the virus intercepts the keyboard input, and depending on Enter keys entered manifests itself by a video effect. The code of effect is corrupted, but it seems that virus turns the fonts upside down. |
