Sentinel Family
Description Sentinel Family
These are harmless(?) memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM, EXE and OVL files that are executed, opened or renamed. These infectors were written in Pascal language. They contain the encrypted text:
You won't hear me, but you'll feel meall (c) 1990 by Sentinel. With thanks
to Borland
Check other viruses! Be aware! Use Antiviral Software
Ocean.2571
Description Ocean.2571
It is not a dangerous memory resident polymorphic parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. The virus does not infect files witch names begins with letters:
WIN, TB, COMMAND, NOD, AV
On start from infected file it checks the current time. If current hours number is equal to current minute, the virus decrypts and displays the message:
This is an Atlantic Ocean I Virus (C) 1997 by #13
If quantity of current second below than 10 it also displays the message:
Listen to Radio RAGTIME 106.6 FM! [and use MSDOS 95 to keep #13 alive]
The virus also contains the encrypted text strings:
Dedicated to the one I love
heuristics :-(, string check :-) This is [Atlantic Ocean I] by #13
Ocsana.692
Description Ocsana.692
This is a benign memory resident encrypted parasitic virus. When an infected file is executed, the virus hooks INT 21h and 28h, and stays memory resident. Then it intercepts the ChangeDir DOS call (AH=3Bh), sets its internal flag and upon the next INT 28h call, searches for .COM files, and infects them.
While infecting a file, the virus encrypts a file and shifts it down by 692 bytes, then writes itself to the beginning of the file.
On August 13, the virus decrypts and displays the following message:
Happy birthday, Ocsana!
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