Dieg.1586
Description Dieg.1586
This is a relatively harmless memory resident parasitic virus. It hooks INT 21h, and writes itself to the end of .COM and .EXE files that are executed. The virus contains the ID-string: "DIEG". In August, the virus also hooks INT 1Ch and 28h, and within 15 minutes after installing into the memory, the virus "shifts" the screen to the left.
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No25.1744
Description No25.1744
These are not dangerous memory resident parasitic stealth viruses, "No25.1894" is encrypted. They hook INT 21h and write themselves to the end of COM and EXE files that are executed or closed. The viruses use anti-debugging tricks. Depending on their counters they display the message:
Made in No.25 middle school which lived in Beijing China.
No444.474
Description No444.474
It is a harmless dangerous memory resident parasitic virus. It hooks INT 21h, 2Fh and writes itself to the end of .COM files that are executed. The virus contains a code that erases the MBR of the hard drive, but this code is never executed. The virus contains the text:
* SCHOOL No.444,MOSCOW *
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