DAG Virus (10-February-1991)
Entry...............: DAG Virus
Alias(es)...........: ---
Virus Strain........: SCA strain
Virus detected when.: MAY 1990      (when VTC received virus code)
              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: "Something wonderful has happened
                         Your AMIGA is alive !!! and, even better... 
                         Some of your disks are infected by a VIRUS !!!
                         Try ANTIVIRUS from DAG The Mega-Mighty SCA !!"
                         and "SCA!SCA!SCA!SCA!SCA!SCA!SCA!"
                      virus feature: pressing left mouse/fire button of
                         port 1 during system reboot causes screen to 
                         become green and the virus to shutdown itself
                         by clearing ColdCapture and CoolCaptureVector
Type of infection...: self-identification method: testing 3rd longword
                         for matching string "CHW!"
                      system infection: RAM resident, reset resident,
                                        bootblock
Infection Trigger...: reset (CONTROL+Left-AMIGA+RIGHT-AMIGA)
Storage media affected: only floppy disks (3.5" and 5.25")
Interrupts hooked...: ---
Damage..............: permanent damage: overwriting bootblock
                      transient damage: screen buffer manipulation:
                         screen becomes black, message (see above) is
                         displayed by fading in and out peaces of it
Damage Trigger......: permanent damage: reset
                      transient damage: 15th infection
Particularities.....: a resident program using the CoolCaptureVector
                         is shutdown, also using the ColdCaptureVector
                         when the virus is shutdown by its suicide
                         function
Similarities........: SCA virus strain
--------------------- 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: SCA-PROTECTOR 1.0,
                                           VIRUS-DETEKTOR 1.1
                      Category 5: Hardware Methods: ---
                      Category 6: Cryptographic Methods: ---
Countermeasures successful: CHECKVECTORS 2.2, GUARDIAN 1.2,
                            VIRUS-DETEKTOR 1.1, SCA-PROTECTOR 1.0;
                            own suicide function
Standard means......: CHECKVECTORS 2.3
--------------------- Acknowledgement --------------------------------
Location............: Virus Test Center, University Hamburg, Germany
Classification by...: Oliver Meng
Documentation by....: Alfred Manthey Rojas
Date................: 10-February-1991
Information Source..: ---

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