Uncouth family
Description Uncouth family
These are harmless memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM files that are executed. The viruses do not manifest themselves in any way.
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MTZ.1907
Description MTZ.1907
This is a benign memory resident parasitic polymorphic and stealth virus. Being executed it checks DOS version and installs itself as memory resident under DOS 5.0 or above. If there is free block of upper memory, this virus copies itself into UMB. This virus infects files on FindFirst/FindNext DOS calls. On opening an infected file the virus disinfects it.
The virus hooks INT 3, 15h, 21h. Interrupt 3 used as decryption routine, INT 15h handler calls trigger routine, INT 21h handler calls infection routine. This virus writes itself to the end of COM files. On warm reset (Alt-Ctrl-Del) it displays the message:
Y.K.K. - (c) M T Z - Italy!
Good Luck Today
MTZ.2624
Description MTZ.2624
This is a benign memory resident parasitic polymorphic and stealth virus. Being executed it checks DOS version and installs itself as memory resident under DOS 5.0 or above. If there is free block of upper memory, this virus copies itself into UMB. This virus infects files on FindFirst/FindNext DOS calls. On opening an infected file the virus disinfects it.
The virus hooks INT 21h and writes itself to the end of EXE files (except SCAN.EXE). Depending on the system timer it displays the message:
Overkill IV Virus - By MTZ - From Italy - <Hit any key to continue>
(Cazzo! Anche oggi un altro 2 di picche, ma si puo' andare avanti cosi' ?)
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