UpDown.881
Description 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.
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Datacrime.1514.a
Description Datacrime.1514.a
This is a very dangerous nonresident virus. As an infected file is executed, it infects by standard way not more than one COM or EXE file in all current directories of all available disks. Depending on the timer and its own internal counters, the virus displays the text:
DATACRIME II VIRUS
After that it makes an attempt to format some tracks of the hard disk.
DataFire.1080
Description DataFire.1080
It is a dangerous not memory resident parasitic virus. It searches for .COM-files and writes itself to their ends. On Fridays, 13th it erases the disk sectors, displays the message and halts the PC:
DataFire I
The Pyro of The Underground
On December Sundays it leaves the TSR program that hooks INT 1Ch, 21h. By hooking INT 1Ch the virus slows down the computer. The hooking of INT 21h is used for "Are you here?" call before INT 1Ch hooking.
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