Virus Database

Havoc (Stealth_Boot) Family

Description Havoc (Stealth_Boot) Family

These are memory resident stealth boot viruses. On loading from infected floppy they write themselves into MBR of hard drive. Then they hook INT 13h and hit floppy disks on reading from them. They infect floppies by "Brain" algorithm.
Depending on the system timer "Havoc.a,b" erase the disk sectors. "Havoc.Amse" is the harmless virus, it does not manifest itself. "Havoc.Alfredo" decrypts the text strings and outputs them to the printer:
LIMA - PERU
(c) Laboratorio Luz de Luna
ANGEL X TE SALUDA

The viruses contain the internal text strings:
"Havoc.a": The HAVOC Virus
"Havoc.b": The Havoc ][ Virus
"Havoc.Alfredo": ALFREDO
"Havoc.Amse": AMSESLIFVASRORIMESAEP

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Indonga.2125

Description Indonga.2125

This is a very dangerous memory resident encrypted parasitic virus. It hooks INT 21h, and writes itself to the end of COM and EXE files. Depending on the system date, the virus corrupts the CMOS, or plays some data by a sound blaster, or returns to DOS instead of the host program.
This virus infects all files that are executed except COMMAND.COM. On September 22 and 24, it erases the disk sectors and displays the following message:
PINDONGA Virus. (Hecho en ARGENTINA)
Programado por: OTTO (16/9/77)
Saludos a: MAQ-MARIANO-SERGIO-ERNESTRO-COSTRA
PD: Alguien mate a Bill Gates (El WINDOWS SE CUELGA)

Indonga.3652

Description Indonga.3652

This virus also hooks INT 20h and 2Fh and infects COMMAND.COM as well as COM and EXE files that are accessed.
On September 16, February 25, March 21, and August 27, it erases the disk sectors and displays:
PINDONGA Virus V5.6. (Hecho en ARGENTINA)
Programado por Otto (16977)
Saludos a MAQ-MARIANO-SERGIO-ERNESTRO-COSTRA-PABLIN
PD: Alguien mate a Bill Gates (El WINDOWS SE CUELGA)
PINDONGA Virus (Programado por OTTO en ARGENTINA) 16977.
Depending on the system conditions, "Indonga.4010" erases the hard drive sectors and displays:
+-----+
|SARIN|
|VIRUS|
+-----+
|HECHO|
| POR |
|-NOP-|
+-----+

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