JITR Virus (10-February-1991)
Entry...............: JITR Virus
Alias(es)...........: ---
Virus Strain........: ---
Virus detected when.: AUGUST 1990   (when VTC received virus copy)
              where.: North Germany
Classification......: system virus (bootblock), resident
Length of Virus.....: 1. length on storage medium: 1024 byte
                      2. length in RAM           : 1024 byte
--------------------- Preconditions ----------------------------------
Operating System(s).: AMIGA-DOS
Version/Release.....: 1.2/33.166, 1.2/33.180 and 1.3/34.20
Computer model(s)...: AMIGA 500, AMIGA 1000, AMIGA 2000A, AMIGA 2000B
--------------------- Attributes -------------------------------------
Easy Identification.: typical text: "JITR" at 3rd bootblock longword,
                         and "Copy count :", "I'm a safe virus! Dont
                         kill me! I want to travel! And now a joke :
                         ATARI ST   This virus is a product of JITR"
                         at the end of bootblock
Type of infection...: self-identification method: testing 2nd longword
                         (=>bootblock checksum for matching own one);
                      system infection: RAM resident, reset resident,
                                        bootblock
Infection Trigger...: every access to unprotected disks
Storage media affected: only floppy disks (3.5" and 5.25")
Interrupts hooked...: ---
Damage..............: permanent damage: overwriting bootblock
                      transient damage: ---
Damage Trigger......: permanent damage: every access to unprotected
                                        disks
Particularities.....: a resident program using the CoolCaptureVector
                         is shutdown, DoIO is modified and points to 
                         virus DoIO routine first;
                      JITR seems to be shortest AMIGA virus, occupying
                         only 498 byte of bootblock, though 1024 bytes
                         are allocated in RAM;
                         copy counter at offset $017A
Similarities........: ---
--------------------- Agents -----------------------------------------
Countermeasures.....: Names of tested products of Category 1-6:
                      Category 1: .2 Monitoring System Vectors:
                                     CHECKVECTORS 2.3
                                  .3 Monitoring System Areas:
                                     CHECKVECTORS 2.3, GUARDIAN 1.2,
                                     VIRUS-KILLER 1.1
                      Category 2: Alteration Detection: ---
                      Category 3: Eradication: CHECKVECTORS 2.2,
                                               VIRUS-DETEKTOR 1.1
                      Category 4: Vaccine: ---
                      Category 5: Hardware Methods: ---
                      Category 6: Cryptographic Methods: ---
Countermeasures successful: CHECKVECTORS 2.2, GUARDIAN 1.2,
                            VIRUS-DETEKTOR 1.1
Standard means......: CHECKVECTORS 2.3
--------------------- Acknowledgement --------------------------------
Location............: Virus Test Center, University Hamburg, Germany
Classification by...: Alfred Manthey Rojas
Documentation by....: Alfred Manthey Rojas
Date................: 10-February-1991
Information Source..: ---

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