Micro 128 Virus

Virus Name: Micro 128 Aliases: Tiny-128, M-128 V Status: Rare Discovered: August, 1991 Symptoms: .COM file growth; file date/time changes Origin: Unknown Eff Length: 128 Bytes Type Code: PRCK - Parasitic Resident .COM Infector Detection Method: ViruScan, F-Prot, Sweep, AVTK, ChAV, NAV, IBMAV, NAVDX, VAlert, PCScan, NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, NAV/N, IBMAV/N Removal Instructions: Delete infected files General Comments: The Micro 128 Virus was received in August, 1991. Its origin is unknown. Micro 128 is a memory resident infector of .COM files, including COMMAND.COM. It uses memory resident techniques similar to the Tiny Family of viruses from Bulgaria. The first time a program infected with Micro 128 is executed, this virus will install itself memory resident in a "hole in memory" located in the interrupt area. Interrupt 21 will be hooked by the virus. There will be no change in total system and available free memory. Once memory resident, Micro 128 will infect .COM files, including COMMAND.COM, when they are executed. Infected .COM files will have increased in size by 128 bytes. The virus will be located at the end of the infected program. Infected files will have their file date and time in the disk directory updated to the system date and time when infection occurred. Micro 128 does not do anything besides replicate. See: Tiny Family